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Journal articles on the topic 'Infrared pulses'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Wei, Xianqi, Xiaoli Wang, Xin Li, and Weihua Liu. "Electronic Pulses from Pulsed Field Emission of CNT Cathodes." Journal of Nanomaterials 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/4396430.

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We presented a demonstration of infrared laser irradiated field emission electronic pulse based on carbon nanotube (CNT) cathodes. Electronic pulses greatly depended on pulsed infrared laser and were almost synchronous with laser pulses. We have designed a pulsed field emission cathode based on CNTs and investigated correlation between electronic pulse and laser pulse, acquiring the shortest width of electronic pulses about 50 ms and turn-on field less than 0.14 V/μm. Besides, we have studied the thermal effect on the pulsed field emission of CNT cathodes caused by laser heating. Interestingly

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2

Wang, Fuyong, Zhipeng Qin, Jing Luo, Xiudong Zhou, and Bo Li. "Duration-controllable mid-infrared pulse from bias-pumped Er:ZBLAN fiber laser." Laser Physics 32, no. 1 (2021): 015102. http://dx.doi.org/10.1088/1555-6611/ac3d0f.

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Abstract We experimentally demonstrate the generation of duration-controllable pulses at 2.8 µm based on bias-pump technique for the first time. Bias-pumped by a 976 nm continuous-wave (CW)-pulsed combined laser, duration-controllable pulses are produced from an Er:ZBLAN fiber laser and the duration is entirely determined by the duration of pump pulse. Numerical simulations agree with experimental results well, and further predict that the temporal profile of output pulse from bias-pumped Er:ZBLAN fiber laser can also be identical with that of pump pulse under certain conditions. The pump-cont

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3

RAKHIMOV, R. KH. "A POSSIBLE MECHANISM OF THE OPTICAL QUANTUM TUNNELING EFFECT IN PHOTOCATALYSTS BASED ON NANOSTRUCTURED FUNCTIONAL CERAMICS." Computational nanotechnology 10, no. 3 (2023): 26–34. http://dx.doi.org/10.33693/2313-223x-2023-10-3-26-34.

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The article examines the proposed mechanism of optical tunneling effect, which explains the property of functional ceramics to convert solar energy into pulses in the infrared range. It is suggested that the incident radiation is absorbed by ceramic particles, exciting lattice vibrations known as phonons. As phonons accumulate, they transition to a higher energy state, generating infrared photons. The key role is played by the presence of a rising edge of the radiation pulse, which determines the wavelength of the pulses regardless of the wavelength of the infrared energy carrier. As a result,

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4

Li, Zhaoli, Yanlei Zuo, Xiaoming Zeng, et al. "Ultraintense few-cycle infrared laser generation by fast-extending plasma grating." Matter and Radiation at Extremes 8, no. 1 (2023): 014401. http://dx.doi.org/10.1063/5.0119868.

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Ultraintense short-period infrared laser pulses play an important role in frontier scientific research, but their power is quite low when generated using current technology. This paper demonstrates a scheme for generating an ultraintense few-cycle infrared pulse by directly compressing a long infrared pulse. In this scheme, an infrared picosecond-to-nanosecond laser pulse counterpropagates with a rapidly extending plasma grating that is created by ionizing an undulated gas by a short laser pulse, and the infrared laser pulse is reflected by the rapidly extending plasma grating. Because of the

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5

Fourcade-Dutin, Coralie, Olivia Zurita-Miranda, Patrick Mounaix, and Damien Bigourd. "Mid-Infrared Ultra-Short Pulse Generation in a Gas-Filled Hollow-Core Photonic Crystal Fiber Pumped by Two-Color Pulses." Fibers 9, no. 4 (2021): 21. http://dx.doi.org/10.3390/fib9040021.

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We show numerically that ultra-short pulses can be generated in the mid-infrared when a gas filled hollow-core fiber is pumped by a fundamental pulse and its second harmonic. The generation process originates from a cascaded nonlinear phenomenon starting from a spectral broadening of the two pulses followed by an induced phase-matched four wave-mixing lying in the mid-infrared combined with a dispersive wave. By selecting this mid-infrared band with a spectral filter, we demonstrate the generation of ultra-short 60 fs pulses at a 3–4 µm band and a pulse duration of 20 fs can be reached with an

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6

SHI, LING-FENG, AI-QIN ZENG, QIN-QIN LI, LI-YE CHENG, and XIN-QUAN LAI. "DYNAMIC PULSE INTEGRATING CIRCUIT FOR INFRARED RECEIVERS." Journal of Circuits, Systems and Computers 22, no. 07 (2013): 1350055. http://dx.doi.org/10.1142/s0218126613500552.

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In this paper, a frequency-tunable dynamic pulse integrating circuit for infrared receivers is presented. The proposed circuits possess many advantages, such as high sensitivity, high immunity against disturbances, simple structure, and so on. This integrator not only defines a minimum time for the burst length and a minimum time between the bursts, but also achieves the same minimum number of pulses in different frequencies. The frequency-tunable dynamic pulse integrator is a combined structure of the center frequency modulation and a new type of pulse integrator. The center frequency modulat

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7

Wang, Juntao, Yuanyuan Qi, Junchao Lu, Xiaodong Li, and Junfei Wang. "Optimization of high-power Er/Yb co-doped fiber amplifiers for dual-band pulse amplification." Modern Physics Letters B 32, no. 22 (2018): 1850263. http://dx.doi.org/10.1142/s0217984918502639.

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In this paper, high-power pulse-pumped erbium–ytterbium co-doped fiber amplifiers (EYDFAs) for simultaneous amplification of low-repetition rate pulses in the 1.0 [Formula: see text]m and 1.5 [Formula: see text]m bands are numerically investigated. The influences of the peak power and pulse-width of the pump and time delay between the pump and signal pulses on the performance of the amplifier are systematically analyzed. The results show that a pulse-pumped EYDFA is capable of simultaneously amplifying dual-band pulses. The optimal pulse-width of the pump is mainly determined by the allowable

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8

Grafenstein, Lorenz von, Martin Bock, Dennis Ueberschaer та ін. "5 μm few-cycle pulses with multi-gigawatt peak power at a 1 kHz repetition rate". Optics Letters 42, № 19 (2017): 3796–99. https://doi.org/10.1364/OL.42.003796.

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A mid-infrared (mid-IR) optical parametric chirped pulse amplification (OPCPA) system generating few-cycle pulses with multi-gigawatt peak power at a 1 kHz repetition rate is reported. The system is pumped by a highly stable 2 μm picosecond chirped pulse amplifier based on Ho:YLF gain media to exploit the high nonlinearity of ZnGeP<sub>2</sub> (ZGP) crystals for parametric amplification. The ZGP optical parametric amplification (OPA) is characterized by a high conversion efficiency of >10 %, resulting in 1.3 mJ idler pulses at a center wavelength of 5.1 μm.

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9

Fadhel, Mahmoud Muhanad, Norazida Ali, Haroon Rashid, et al. "A Review on Rhenium Disulfide: Synthesis Approaches, Optical Properties, and Applications in Pulsed Lasers." Nanomaterials 11, no. 9 (2021): 2367. http://dx.doi.org/10.3390/nano11092367.

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Rhenium Disulfide (ReS2) has evolved as a novel 2D transition-metal dichalcogenide (TMD) material which has promising applications in optoelectronics and photonics because of its distinctive anisotropic optical properties. Saturable absorption property of ReS2 has been utilized to fabricate saturable absorber (SA) devices to generate short pulses in lasers systems. The results were outstanding, including high-repetition-rate pulses, large modulation depth, multi-wavelength pulses, broadband operation and low saturation intensity. In this review, we emphasize on formulating SAs based on ReS2 to

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10

Bai, Yeran, Delong Zhang, Lu Lan, et al. "Ultrafast chemical imaging by widefield photothermal sensing of infrared absorption." Science Advances 5, no. 7 (2019): eaav7127. http://dx.doi.org/10.1126/sciadv.aav7127.

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Infrared (IR) imaging has become a viable tool for visualizing various chemical bonds in a specimen. The performance, however, is limited in terms of spatial resolution and imaging speed. Here, instead of measuring the loss of the IR beam, we use a pulsed visible light for high-throughput, widefield sensing of the transient photothermal effect induced by absorption of single mid-IR pulses. To extract these transient signals, we built a virtual lock-in camera synchronized to the visible probe and IR light pulses with precisely controlled delays, allowing submicrosecond temporal resolution deter

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11

ABDULRAHMAN, Hayder J., and Suzan B. MOHAMMED. "DEVELOPMENT OF ULTRA-SHORT HIGH INTENSITY LASERS FOR THE VISIBLE SPECTRA RANGE." Periódico Tchê Química 17, no. 35 (2020): 739–52. http://dx.doi.org/10.52571/ptq.v17.n35.2020.63_abdulrahman_pgs_739_752.pdf.

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Ultra-short laser pulses are particularly suitable for processing micro tools made of ultra-hard and dielectric materials. Ultra-short laser pulses provide a contact-free and precise fabrication of heat-sensitive materials such as visible spectra range. Visible spectra range has unique properties, which makes it an essential material in the tool, jewelry, and semiconductor industries. The processing of visible spectra range by ultra-short laser pulses is complex, as visible and near-infrared light is generally not absorbed. However, the intensity of ultra-short laser pulses is extremely high,

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12

Peiyu, Xia, Lu Faming, Ishii Nobuhisa, Kanai Teruto та Itatani Jiro. "Generation of sub-two-cycle CEP-stable optical pulses at 3.5 μm by multiple-plate pulse compression for high-harmonic generation in crystals". EPJ Web of Conferences 205 (2019): 01006. http://dx.doi.org/10.1051/epjconf/201920501006.

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Multiple-plate pulse compression of femtosecond mid-infrared pulses is demonstrated using YAG and Si windows. With this robust compression scheme, we produce sub-two-cycle, CEP-stable optical pulses and observe CEP-dependent high harmonic generation in crystals.

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13

Towrie, Michael, David C. Grills, Joanne Dyer, et al. "Development of a Broadband Picosecond Infrared Spectrometer and its Incorporation into an Existing Ultrafast Time-Resolved Resonance Raman, UV/Visible, and Fluorescence Spectroscopic Apparatus." Applied Spectroscopy 57, no. 4 (2003): 367–80. http://dx.doi.org/10.1366/00037020360625899.

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We have constructed a broadband ultrafast time-resolved infrared (TRIR) spectrometer and incorporated it into our existing time-resolved spectroscopy apparatus, thus creating a single instrument capable of performing the complementary techniques of femto-/picosecond time-resolved resonance Raman (TR3), fluorescence, and UV/visible/infrared transient absorption spectroscopy. The TRIR spectrometer employs broadband (150 fs, ∼150 cm−1 FWHM) mid-infrared probe and reference pulses (generated by difference frequency mixing of near-infrared pulses in type I AgGaS2), which are dispersed over two 64-e

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14

Wang, Zefeng, Daping Luo, Gehui Xie, Zejiang Deng, Chenglin Gu, and Wenxue Li. "Tunable Ultraviolet Pulse Generation from a High-Power Self-Similar-Amplification Yb-Fiber Laser." Photonics 12, no. 1 (2025): 50. https://doi.org/10.3390/photonics12010050.

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A tunable high-power 60 MHz ultraviolet pulse laser directly produced by the extra-cavity fourth-order harmonic generation of a self-similar amplification infrared pulse laser is reported in this study. Utilizing the self-similar pulse evolution and the self-phase modulation in a self-similar amplifier, the system generates a 58.9 W pulse train with a spectral half-width of 85.4 nm, corresponding to a pulse duration of 36 fs. To obtain the ultraviolet pulses from the infrared pulses, a single-pass frequency quadrupling system comprising two cascaded β-BBOs was used. The ultraviolet spectra can

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15

Han, Lize, and Xiaohui Gao. "Control of Spatiotemporal Localization of Infrared Pulses in Gas-Filled Capillaries Using Weak Ultraviolet Pulses." Photonics 10, no. 10 (2023): 1130. http://dx.doi.org/10.3390/photonics10101130.

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Manipulation of intense pulse propagation in gas-filled capillaries is desirable for various high-field applications. Tuning the parameters of the driving laser pulse and the working gas is the conventional approach, and it provides limited capability of control. Here we demonstrate through numerical simulations a practical scheme to control the propagation of intense pulses. A weak ultraviolet pulse is launched into a capillary with a negative delay with respect to a main infrared pulse. The pulses begin to temporally overlap due to dispersion. As the main pulse self-compresses, the control p

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16

Treffer, A., D. Kühn, F. Wyrowski, and R. Grunwald. "Symmetric spatio-temporal focusing of ultrashort pulses." EPJ Web of Conferences 238 (2020): 02002. http://dx.doi.org/10.1051/epjconf/202023802002.

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Simultaneous spatio-temporal focusing of few-cycle pulses is usually performed by stretcher-compressor configurations causing pulse-front tilt. By shaping and superimposing two reciprocal sub-beams, opposite tilts can compensate each other. Pulse propagation for asymmetric and symmetric focusing of near infrared 5-fs-pulses is studied by numerical simulations and proof-of-principle experiments.

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17

Gradauskas, Jonas, and Steponas Ašmontas. "Hot Carrier Photocurrent through MOS Structure." Applied Sciences 11, no. 16 (2021): 7211. http://dx.doi.org/10.3390/app11167211.

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Flow of photocurrent through the metal-oxide-semiconductor structure induced by the pulsed infrared CO2 laser is investigated experimentally. In the case of a perfect insulator, the photocurrent has a photocapacitive character. Its rise is based on the hot carrier phenomenon; no carrier generation is present, only redistribution of laser-heated carriers takes place at the semiconductor surface. The magnitude of this displacement current is related to the capacitance of the structure and is dependent on the rate of the laser pulse change as well as on the laser light intensity. This effect can

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18

Duda, Martin, Grafenstein Lorenz von, Martin Bock та ін. "10 μJ few-cycle 12μm source based on difference-frequency generation driven by a 1 kHz mid-wave infrared OPCPA". Opt. Lett. 47 (31 травня 2022): 2891–94. https://doi.org/10.1364/OL.456971.

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We report on high-energy, few-cycle pulse generation in the long-wave infrared spectral region via difference-frequency generation (DFG) in GaSe and AgGaSe2nonlinear crystals. The DFG is driven by the signal at 3.5 μm and idler at 5 μm of a high-power mid-wave infrared optical parametric chirped pulse amplification (OPCPA) system operating at a 1-kHz repetition rate. The DFG pulses contain up to 17 μJ of energy and cover a spectrum from 8.5 μm to 14.5 μm. They are generated with a conversion efficiency of 2.1 %. Compression results in 10.2-μJ pulses with sub-150-fs duration, corresponding to l

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19

Chen, Gao. "Isolated attosecond pulse generation from helium atom irradiated by a three-color laser pulse." Acta Physica Sinica 71, no. 5 (2022): 054204. http://dx.doi.org/10.7498/aps.71.20211502.

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Isolated attosecond pulses enables the studying and controlling of ultrafast electron processes in atoms and molecules. High-order harmonic generation (HHG) is the most promising way to generate such pulses, benefiting from the broad plateau structure of the typical HHG spectrum. We theoretically investigate high-order harmonic and attosecond pulse generation from helium atom in a three-color laser field, which is synthesized by 16 fs/1600 nm, 15 fs/1100 nm and 5 fs/800 nm pulse laser. Compared with harmonic spectrum generated by a two-color laser field synthesized by 16 fs/1600 nm and 15 fs/1

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20

Janssen, T., C. S. Davies, M. Gidding, V. Chernyy, J. M. Bakker, and A. Kirilyuk. "Cavity-dumping a single infrared pulse from a free-electron laser for two-color pump–probe experiments." Review of Scientific Instruments 93, no. 4 (2022): 043007. http://dx.doi.org/10.1063/5.0081862.

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Electromagnetic radiation in the mid- to far-infrared spectral range represents an indispensable tool for the study of numerous types of collective excitations in solids and molecules. Short and intense pulses in this terahertz spectral range are, however, difficult to obtain. While wide wavelength-tunability is easily provided by free-electron lasers, the energies of individual pulses are relatively moderate, on the order of microjoules. Here, we demonstrate a setup that uses cavity-dumping of a free-electron laser to provide single, picosecond-long pulses in the mid- to far-infrared frequenc

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21

Janssen, T., C. S. Davies, M. Gidding, V. Chernyy, J. M. Bakker, and A. Kirilyuk. "Cavity-dumping a single infrared pulse from a free-electron laser for two-color pump–probe experiments." Review of Scientific Instruments 93, no. 4 (2022): 043007. http://dx.doi.org/10.1063/5.0081862.

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Electromagnetic radiation in the mid- to far-infrared spectral range represents an indispensable tool for the study of numerous types of collective excitations in solids and molecules. Short and intense pulses in this terahertz spectral range are, however, difficult to obtain. While wide wavelength-tunability is easily provided by free-electron lasers, the energies of individual pulses are relatively moderate, on the order of microjoules. Here, we demonstrate a setup that uses cavity-dumping of a free-electron laser to provide single, picosecond-long pulses in the mid- to far-infrared frequenc

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22

Janssen, T., C. S. Davies, M. Gidding, V. Chernyy, J. M. Bakker, and A. Kirilyuk. "Cavity-dumping a single infrared pulse from a free-electron laser for two-color pump–probe experiments." Review of Scientific Instruments 93, no. 4 (2022): 043007. http://dx.doi.org/10.1063/5.0081862.

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Electromagnetic radiation in the mid- to far-infrared spectral range represents an indispensable tool for the study of numerous types of collective excitations in solids and molecules. Short and intense pulses in this terahertz spectral range are, however, difficult to obtain. While wide wavelength-tunability is easily provided by free-electron lasers, the energies of individual pulses are relatively moderate, on the order of microjoules. Here, we demonstrate a setup that uses cavity-dumping of a free-electron laser to provide single, picosecond-long pulses in the mid- to far-infrared frequenc

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23

Tomasevic, I. "The effect of intense light pulses on the sensory quality and instrumental color of meat from different animal breeds." Biotehnologija u stocarstvu 31, no. 2 (2015): 273–81. http://dx.doi.org/10.2298/bah1502273t.

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Intense light pulses (ILP) are an emerging processing technology, which has a potential to decontaminate food products. The light generated by ILP lamps consists of a continuum broadband spectrum from deep UV to the infrared, especially rich in UV range below 400 nm, which is germicidal. Evaluation of the effect of intense light pulses (ILP) on sensory quality of meat, game and poultry was performed using two kinds of red meat (beef and pork), two kinds of poultry (chicken and turkey) and three game meat samples (deer, rabbit and kangaroo). All the samples were treated with 1 and 5 light pulse

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24

Balachninaitė, O., J. Skruibis, A. Matijošius, and V. Vaičaitis. "Temporal and spatial properties of plasma induced by infrared femtosecond laser pulses in air." Plasma Sources Science and Technology 31, no. 4 (2022): 045001. http://dx.doi.org/10.1088/1361-6595/ac5c62.

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Abstract Space and time-resolved electron density and temperature of the plasma, created in air by focused femtosecond laser pulses have been investigated as a function of the pump pulse energy and duration. For the air ionization the infrared (1030 nm) femtosecond (190–500 fs) Yb:KGW laser pulses of up to 1 mJ energy were used. Based on the Stark broadening of the oxygen-I 777.19 nm line we have found that after establishing a local equilibrium the density of laser-created plasma could exceed 1017 cm−3 with the electron temperature of over 5000 °C. Obtained results agree well with the results

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25

Hussein, Jasim Mohamad, Saif Khalel Jasim, Tariq Faraj Abdullah, and Awatif Saber Jasim. "Study and Characterization ZnO Nanoparticles Prepared by Switched Laser Nd:YAG." Indonesian Journal of Material Research 2, no. 3 (2024): 73–78. http://dx.doi.org/10.26554/ijmr.20242340.

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In this research, zinc nanoparticles were prepared using pulsed laser ablation in liquids. A pulsed Nd+:YAG laser with wavelength (532 nm) was applied to a pure zinc target immersed in deionized water, and the structural and optical properties of the prepared zinc nanoparticles were studied. The behavior of the UV absorption spectra of zinc nanoparticles was studied as a function of pulse number and ablation energy. The UV-vis absorption spectra showed absorption peaks in the ultraviolet region and in the visible region, the latter being responsible for the formation of zinc nanoparticles, and

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26

Okuhata, Hiroyuki, Hiroshi Uno, Keiji Kumatani, Isao Shirakawa, and Toru Chiba. "A Low Power Receiver Architecture for 4 Mbps Infrared Wireless Communication." Journal of Circuits, Systems and Computers 07, no. 05 (1997): 483–94. http://dx.doi.org/10.1142/s021812669700036x.

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A high performance and low power architecture is devised for a 4 Mbps infrared wireless communication system dedicated to mobile computing. In this architecture, 4PPM (4-Pulse Position Modulation) infrared signals detected by an infrared receiver are digitized into TTL interface level pulses, and the digitized pulses are demodulated by a 1-bit digital demodulator. To extend the range of the link length, a 4PPM demodulator is synthesized to implement a demodulation algorithm which is constructed so as to accommodate the output tolerance of the infrared receiver. A part of the experimental resul

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Wang, Min, Jie Chen, Niu Liu, and Ya Wang. "Inter-Pulse Spectroscopy Based on Room-Temperature Pulsed Quantum-Cascade Laser for N₂O Detection." Applied Mechanics and Materials 128-129 (October 2011): 607–10. http://dx.doi.org/10.4028/www.scientific.net/amm.128-129.607.

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Mid-infrared lasers are very suitable for high-sensitive trace-gases detection for their wavelengths cover the fundamental absorption lines of most gases. Quantum-cascade (QC) lasers have been demonstrated to be ideal light sources with its special power, tuning and capability of operating in room-temperature. All these merits make it appropriate for the high resolution spectrum analysis. The absorption spectrum monitoring technology based on the QC laser pulsed operating in the room temperature, combining with the strong absorption of the gas molecule in the basic frequency, has become an eff

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Asayonak, M. A., A. O. Zenevich, Ya V. Novikau, and S. A. Saroca. "Influence of optical radiation parameters on the amplitude characteristics of silicon photoelectron multipliers." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 1 (2020): 104–9. http://dx.doi.org/10.29235/1561-8358-2020-65-1-104-109.

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At present, silicon photoelectronic multipliers with a low voltage, high sensitivity in the visible and near infrared spectral regions, and large amplification factors are often used to record optical radiation in a wide range of intensities of the visible and near infrared spectral regions. The purpose of this article is to determine the dependence of the type of amplitude distribution of pulses, created by silicon photoelectronic multipliers, on the intensity of the recorded optical radiation. As research objects, commercially available Ketek PM 3325 and ON Semi FC 30035 silicon photomultipl

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Pathiraje, Darshika, Janelle Carlin, Tanya Der, Janitha P. D. Wanasundara, and Phyllis J. Shand. "Generating Multi-Functional Pulse Ingredients for Processed Meat Products—Scientific Evaluation of Infrared-Treated Lentils." Foods 12, no. 8 (2023): 1722. http://dx.doi.org/10.3390/foods12081722.

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In the last decade, various foods have been reformulated with plant protein ingredients to enhance plant-based food intake in our diet. Pulses are in the forefront as protein-rich sources to aid in providing sufficient daily protein intake and may be used as binders to reduce meat protein in product formulations. Pulses are seen as clean-label ingredients that bring benefits to meat products beyond protein content. Pulse flours may need pre-treatments because their endogenous bioactive components may not always be beneficial to meat products. Infrared (IR) treatment is a highly energy-efficien

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Xu, Hui, Shuai Yuan, Zhengru Guo, et al. "Femtosecond Red and Near-Infrared Lasers Due to Cascaded-Raman-Assisted Four-Wave Mixing in a Nonlinear Yb-Doped Fiber Amplifier." Applied Sciences 10, no. 2 (2020): 669. http://dx.doi.org/10.3390/app10020669.

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We demonstrated a straightforward approach to generate red and near-infrared laser emissions by a Raman-assisted four wave mixing (FWM) process in a nonlinear Yb-doped fiber amplifier, delivering 342 fs pulses of 241 nJ at 864 nm, 834 fs pulses of 21 nJ at 751 nm, and 1.9 ps pulses of 3.8 μJ at 1030 nm. A pair of gratings was employed as the pre-compressor to promote the intensity of the fundamental wave in the main amplifier. Multiple wavelengths from 751 to 1273 nm resulted due to cascaded-Raman-assisted FWM. The pre-compression also underlay the achievement of 25.1, 701, and 2000 kW peak po

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Flender, Roland, Adam Borzsonyi, and Viktor Chikan. "The role of asymmetry in few-cycle, mid-IR pulses during THz pulse generation." Journal of Optics 24, no. 4 (2022): 045502. http://dx.doi.org/10.1088/2040-8986/ac5289.

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Abstract The efficiency of terahertz (THz) pulse generation improves at longer driving wavelengths. For this reason, the use of mid-infrared (MIR) sources is more advantageous compared to visible or near-infrared systems. In this work, we investigate how single-color and two-color schemes of MIR pulses with few-cycle pulse durations compare in producing THz pulses. The results reveal that as the duration of the driving pulses decreases, the second harmonic generation crystal can be omitted from the system. Our numerical study pinpointed three regions where the optimal pulse parameters are fund

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HEKMAT, BAKTASH, VAHID AHMADI, and ELHAM DARABI. "TEMPORAL AND SPECTRAL ANALYSIS FOR MID-INFRARED FOUR-WAVE MIXING IN QUANTUM INTERSUBBAND STRUCTURE." Modern Physics Letters B 27, no. 21 (2013): 1350149. http://dx.doi.org/10.1142/s0217984913501492.

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We design a quantum cascade (QC) intersubband structure for four-wave mixing (FWM) generation from In 0.53 Ga 0.47 As / In 0.52 Al 0.48 As in the mid-infrared spectral region which can be described by third-order nonlinear optical susceptibility. In this structure, increasing FWM is accomplished by band engineering which modify energy of subbands. To analyze FWM characteristics in a QC structure, the evolution in time and spectral domain of pump and probe input optical pulses with different frequencies during propagation is calculated and simulated by using finite-difference beam propagation m

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Dem'yanenko M. A. and Startsev V. V. "Application of uncooled microbolometers for detecting pulsed terahertz and infrared radiation." Technical Physics 92, no. 3 (2022): 359. http://dx.doi.org/10.21883/tp.2022.03.53266.190-21.

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Analytical relations for temperature response of the bolometer to periodic radiation pulses are obtained. It is theoretically shown and experimentally confirmed by the example of infrared bolometers that when detecting short radiation pulses, in contrast to the case of constant radiation, increasing the thermal conductivity of the bolometer and, accordingly, decreasing its thermal relaxation time, it is possible to significantly increase the response rate of the receiver, practically without reducing its sensitivity. The possibility of effective registration of pulsed terahertz radiation by mi

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Cudney, Roger Sean, and Citlali Minor. "Sub-nanosecond, megawatt compact diode-pumped Nd:YLF laser." Revista Mexicana de Física 64, no. 5 (2018): 512. http://dx.doi.org/10.31349/revmexfis.64.512.

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We present a compact source of sub-nanosecond infrared laser pulses. The system is a diode-pumped, passively Q-switched Nd:YLF laser that emits 1.047µm pulses with a FWHM duration of 750 ps, an energy of 2.3 mJ per pulse at a repetition rate of over 40 Hz. We also provide a simple rate-equation model that adequately describes the experimental results. This laser is ideal for several applications that require energetic sub-nanosecond pulses that cannot be obtained easily with actively Q-switched lasers or mode-locked lasers.

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Schenkel, Thomas, Walid Redjem, Arun Persaud, et al. "Exploration of Defect Dynamics and Color Center Qubit Synthesis with Pulsed Ion Beams." Quantum Beam Science 6, no. 1 (2022): 13. http://dx.doi.org/10.3390/qubs6010013.

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Short-pulse ion beams have been developed in recent years and now enable applications in materials science. A tunable flux of selected ions delivered in pulses of a few nanoseconds can affect the balance of defect formation and dynamic annealing in materials. We report results from color center formation in silicon with pulses of 900 keV protons. G-centers in silicon are near-infrared photon emitters with emerging applications as single-photon sources and for spin-photon qubit integration. G-centers consist of a pair of substitutional carbon atoms and one silicon interstitial atom and are ofte

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Folpini, Giulia, Klaus Reimann, Michael Woerner та ін. "Millijoule few-cycle 5 μm source at 1 kHz repetition rate for generating broadband pulses from the mid- to far-infrared". EPJ Web of Conferences 205 (2019): 01014. http://dx.doi.org/10.1051/epjconf/201920501014.

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M., Ludwig, Rybka T., Ritzkowsky F., et al. "Single-Cycle Autocorrelation in Attosecond Coherent Nanotransport." EPJ Web of Conferences 205 (2019): 08001. http://dx.doi.org/10.1051/epjconf/201920508001.

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We employ a pair of single-cycle near-infrared pulses to control coherent transfer of single electrons between the contacts of a plasmonic nanocircuit. As a result, attosecond and highly nonlinear phenomena occur at pJ pulse energies.

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38

Rezvani, Seyed Ali, Yutaka Nomura, and Takao Fuji. "Generation and Characterization of Mid-Infrared Supercontinuum in Bulk YAG Pumped by Femtosecond 1937 nm Pulses from a Regenerative Amplifier." Applied Sciences 9, no. 16 (2019): 3399. http://dx.doi.org/10.3390/app9163399.

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We have demonstrated the generation of supercontinuum (SC) pulses in bulk, using femtosecond pulses directly derived from a Tm:YAP regenerative amplifier. The SC spans from 380 nm–4 μ m. Such an SC combined with the applied 1937-nm pump pulse can be used in a mid-infrared optical parametric amplifier (MIR-OPA). A full characterization of the phase and stability of the SC provides important insight into the performance of such MIR-OPA systems. Using cross-correlation frequency-resolved optical gating (XFROG), we characterized the properties of the MIR section of the SC that can be used as a see

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39

Bekhtin, Yu S., Yu A. Filatov, A. A. Ilyin, and T. A. Shirabakina. "Mathematical model of scanning infrared sensor reaction to point object in telecommunication systems." Telecommunications, no. 6 (2021): 2–9. http://dx.doi.org/10.31044/1684-2588-2021-0-6-2-9.

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The problem of constructing a «correct» mathematical model of the bell-shaped reaction of a scanning infrared sensor to a point object is considered. The suggested model takes into account changes in amplitude, duration and a shape of channel pulses in different situations when a light spot hits photosensitive areas. The results of computer modeling have shown low efficiency of traditional matched filtering in estimating amplitude of pulses from point objects when the sin2 function is used as a pulse model.

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Laskovnev, A. P., M. I. Markevich, A. N. Malyshko, V. I. Zhuravleva, and A. M. Chaplanov. "Formation of colloidal solutions of silicon nanoparticles in ethyl alcohol with ultra-short laser pulses." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 66, no. 1 (2021): 7–11. http://dx.doi.org/10.29235/1561-8358-2021-66-1-7-11.

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The study of surface morphology of a silicon target after laser exposure, the formation and study of nanoparticles, obtained by laser ablation by ultrashort infrared pulses, were conducted. The material was processed using a yttrium aluminum garnet laser (LS-2134D) with a wavelength of 1064 nm, generating in a two-pulse mode (pulses are separated by a time interval of 3 μs, pulse duration is 10 ns, pulse repetition rate is 10 Hz, single pulse energy ~ 0.05 J). Alcohol solutions of silicon nanoparticles were obtained by laser ablation. It is shown that an ensemble of particles of different size

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Stepanov, E. A., A. N. Zhdanov, I. V. Savitskii, et al. "Broadband two-dimensional spectrochronography with ultrashort pulses in the mid-infrared." Quantum Electronics 52, no. 3 (2022): 227–32. http://dx.doi.org/10.1070/qel18004.

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Abstract A novel, 2.6-to-10-μm wavelength-tunable laser source of sub-70-fs pulses is combined with mid-IR heterodyne detection to provide a versatile laser platform for broadband two-dimensional Fourier-transform infrared spectrochronography. The mid-infrared laser output serves as both a short-pulse driver and a broadband probe for time-resolved studies of ultrafast molecular coherence, population dynamics, and multimodal energy transfer in a vast class of complex molecular systems.

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Dvuzhilov, Ilya, Yulia Dvuzhilova, and Mikhail Belonenko. "Extremely Short Optical Pulses in a Medium of Oriented Carbon Nanotubes with Nonlinearities of Orders 3 and 5." NBI Technologies, no. 2 (September 2023): 11–17. http://dx.doi.org/10.15688/nbit.jvolsu.2023.2.2.

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In the work, a theoretical study was carried out as well as numerical simulation of the interaction of three-dimensional extremely short pulses with an inhomogeneous array of oriented semiconductor carbon nanotubes, with polarization nonlinearities of 3 and 5 orders. The results of the temporal evolution of such pulses and the dependence of the pulse strength on the parameters of the inhomogeneity of an array of oriented nanotubes are shown. Extremely short pulses (ESP), in this case, mean optical pulses of high intensity, containing one to five periods of the electromagnetic field, with a dur

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Babich, Ekaterina, Vladimir Kaasik, Alexey Redkov, Thomas Maurer, and Andrey Lipovskii. "SERS-Active Pattern in Silver-Ion-Exchanged Glass Drawn by Infrared Nanosecond Laser." Nanomaterials 10, no. 9 (2020): 1849. http://dx.doi.org/10.3390/nano10091849.

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The irradiation of silver-to-sodium ion-exchanged glass with 1.06-μm nanosecond laser pulses of mJ-range energy results in the formation of silver nanoparticles under the glass surface. Following chemical removal of ~25-nm glass layer reveals a pattern of nanoparticles capable of surface enhancement of Raman scattering (SERS). The pattern formed when laser pulses are more than half-overlapped provides up to ~105 enhancement and uniform SERS signal distribution, while the decrease of the pulse overlap results in an order of magnitude higher but less uniform enhancement.

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Sato, Takahiro, James M. Glownia, Matthiew R. Ware, Matthieu Chollet, Silke Nelson, and Diling Zhu. "A simple instrument to find spatiotemporal overlap of optical/X-ray light at free-electron lasers." Journal of Synchrotron Radiation 26, no. 3 (2019): 647–52. http://dx.doi.org/10.1107/s1600577519002248.

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A compact and robust diagnostic to determine spatial and temporal overlap between X-ray free-electron laser and optical laser pulses was developed and evaluated using monochromatic X-rays from the Linac Coherent Light Source. It was used to determine temporal overlap with a resolution of ∼10 fs, despite the large pulse energy fluctuations of the monochromatic X-ray pulses, and covers a wide optical wavelength range from ultraviolet to near-infrared with a single configuration.

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Ščajev, Patrik, Saulius Miasojedovas, Algirdas Mekys, Pavels Onufrijevs, and Hung-Hsiang Cheng. "Time-Resolved Photoluminescence in GeSn Film by New Infrared Streak Camera Attachment Based on a Broadband Light Upconversion." Coatings 13, no. 1 (2023): 111. http://dx.doi.org/10.3390/coatings13010111.

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GeSn coatings on commercial Si substrates have gained increased interest for application in infrared detectors and lasers. The characterization of these materials is crucial for their quality assessment and in describing device performance for commercialization. The time-resolved photoluminescence is an efficient method for contactless, time-resolved characterization of GeSn optoelectronic properties. For this purpose, in this work, we developed an infrared streak camera attachment based on the broadband upconversion of infrared photoluminescence by using powerful nanosecond 1064 nm pulses. Th

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Koller, Florian O., Karin Haiser, Markus Huber, et al. "Generation of narrowband subpicosecond mid-infrared pulses via difference frequency mixing of chirped near-infrared pulses." Optics Letters 32, no. 22 (2007): 3339. http://dx.doi.org/10.1364/ol.32.003339.

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Haris, Hazlihan, Malathy Batumalay, Tan Sin Jin, et al. "All-Fiber High-Energy Mode-Locked Ytterbium-Doped Fiber Laser with Bismuth Telluride Nanosheet Saturable Absorber." Crystals 12, no. 11 (2022): 1507. http://dx.doi.org/10.3390/cryst12111507.

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Utilizing bismuth telluride (Bi2Te3) nanosheet saturable absorbers (SA), a remarkable source of continuous-wave infrared radiation known for its high efficiency and wide range of accessible wavelengths, has been successfully developed. The mode-locking bright pulses have a repetition frequency of 9.5 MHz and a pulse width of 0.6 ps at a power level of 203.5 mW. The optical spectrum has its center at 1050.23 nm and delivers pulse energies of 2.13 nJ and output power of 20.3 mW. Using a straightforward 18 m long ring design and a laser cavity with a −19.9 ps2/km dispersion, a 44 dB signal-to-noi

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48

Owada, Shigeki, Mizuho Fushitani, Akitaka Matsuda, et al. "Characterization of soft X-ray FEL pulse duration with two-color photoelectron spectroscopy." Journal of Synchrotron Radiation 27, no. 5 (2020): 1362–65. http://dx.doi.org/10.1107/s1600577520008516.

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The pulse duration of soft X-ray free-electron laser (FEL) pulses of SACLA BL1 (0.2–0.3 nC per bunch, 0.5–0.8 MeV) were characterized by photoelectron sideband measurements. The intensity of the He 1 s−1 photoelectron sidebands generated by a near-infrared femtosecond laser was measured as a function of the time delay between the two pulses using an arrival time monitor. From the width of the cross-correlation trace thus derived, the FEL pulse duration was evaluated to be 28 ± 5 fs full width at half-maximum in the photon energy range between 40 eV and 120 eV.

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Feng, Xiaoyue, Yanyan Xue, Jingjing Liu, et al. "High-peak-power narrow-pulsed linearly polarized laser at ∼3 µm." Optics Express 32, no. 23 (2024): 42165. http://dx.doi.org/10.1364/oe.542304.

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A hundred-watt-level peak-power linearly polarized Ho,Pr:GdScO3 laser with narrow pulses was first realized at ∼3 µm through a combination of theoretical simulation and experiment. This is the narrowest pulse width, and the highest peak power has been achieved in a passively pulsed Ho,Pr co-doped laser to date. We realized a linearly polarized narrow-pulsed laser at ∼3 µm, with a maximum peak power of 185 W and shortest pulse width of 42 ns. A further theoretical model was built by simulating the dynamic process of the mid-infrared (MIR) pulsed Ho,Pr:GdScO3 laser using coupled rate equations.

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Jafarzadeh, Hossein, Elnaz Ahmadi Sangachin, and Seyyed Hossein Asadpour. "Infrared control of slow light in a slab doped by InGaN/GaN quantum dot nanostructure." Modern Physics Letters B 29, no. 05 (2015): 1550012. http://dx.doi.org/10.1142/s0217984915500128.

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In this paper, we proposed a model for controlling the group velocity of the transmitted and reflected pulses in a slab medium doped by four-level quantum dot nanostructure. Here, an infrared signal field interacted by quantum dot nanostructure can affect the behavior of reflected and transmitted pulses. We show that in the presence and absence of infrared pulses, the other controllable parameters have essential roles for controlling the slow and fast light propagation through the medium. Moreover, we found that the simultaneous slow and fast light can be obtained for the transmitted and refle

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