Relevant bibliographies by topics / Pulsed light modulation

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Pulsed light modulation'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Pulsed light modulation"

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Wojtkowski, Wojciech, and Rafał Kociszewski. "Pulse-Width Modulation Approaches for Efficient Harmonic Suppression." Electronics 14, no. 13 (2025): 2651. https://doi.org/10.3390/electronics14132651.

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Pulse-width modulation (PWM) and pulse-density modulation (PDM) are widely used in applications where electrical energy is delivered in a pulsed manner. Typical examples include LED (light-emitting diode) control, DC motor control, switched-mode power supplies (SMPS), and electric heating control. However, the pulsed operation of power switches is often associated with significant electromagnetic interference (EMI). As an alternative, stochastic pulse-density modulation (SPDM), also referred to as stochastic signal density modulation (SSDM), can be considered. This technique distributes the en
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Fan, S., X. Zhang, X. Gu, H. Shen, and M. Liu. "Influence of pulse width on luminous efficiency for a two-degree field." Lighting Research & Technology 49, no. 3 (2016): 357–69. http://dx.doi.org/10.1177/1477153515626772.

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A two-degree bipartite field was used to investigate the influence of pulse width on human luminous perception. The frequency of the pulsed light was 100 Hz and the duty ratio was set to 1, 2, 5, 10, 20, 30, 50 and 70%. The results show that pulsed light has a brightness enhancement effect and that the enhancement effect changes when the wavelength and duty ratio are different. The maximum enhancement effect appears at 430 nm and the minimum at 460 nm. Then, a theoretical spectral luminous function for pulsed light as a function of wavelength and duty ratio was calculated using cone fundamenta
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Zhao, Lina, Wenyu Zhang, Ye Yuan та ін. "Mo:BiVO4 Nanoparticles-Based Optical Modulator and Its Application in a 2-μm Pulsed Laser". Nanomaterials 11, № 12 (2021): 3243. http://dx.doi.org/10.3390/nano11123243.

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Mo:BiVO4 nanoparticles were employed as an optical modulator in a Q-switched all-solid-state Tm:YAP laser for the first time. The nonlinear optical parameters of Mo:BiVO4 nanoparticles in the 2-μm region were characterized by measuring nonlinear transmission. Saturation intensity was 718 MW/cm2, and the modulation depth was 12.3%. A stable pulse sequence was acquired with a 70.08 kHz maximum repetition rate and an 821 ns pulse width. The maximum output average power was 153 mW, corresponding to 2.18 μJ single pulse energy and 2.67 W peak power. Although the response wavelength of Mo:BiVO4 is i
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Lin, Shangfei, Hui Jiang, Qiqi Fu, et al. "Effects of Pulsed Light on Mycelium Growth and Conidiation in Aspergillus oryzae." Fermentation 9, no. 7 (2023): 674. http://dx.doi.org/10.3390/fermentation9070674.

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Understanding how Aspergillus oryzae responds to light is critical for developing efficient light regulation strategies in the brewing and waste treatment industries. Although continuous light is known to restrict A. oryzae, little is known about A. oryzae’s sensitivity to light with photoperiod. In this study, we used pulse wave modulation (PWM) to generate nine pulsed blue light (PBL) treatments with varying peak light intensities and frequencies. The effect of PBL on A. oryzae was then compared to that of continuous blue light (CBL). Our findings showed that A. oryzae GDMCC 3.31 mycelium de
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Wu, Jianhua, Xiaofeng Zhang, and Liang Chen. "Research on the Dual Modulation of All-Fiber Optic Current Sensor." Sensors 22, no. 2 (2022): 430. http://dx.doi.org/10.3390/s22020430.

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Acousto-optic modulator (AOM) and electro-optical modulator (EOM) are applied to realize the all-fiber current sensor with a pulsed light source. The pulsed light is realized by amplitude modulation with AOM. The reflected interferometer current sensor is constructed by the mirror and phase modulation with EOM to improve the anti-interference ability. A correlation demodulation algorithm is applied for data processing. The influence of the modulation frequency and duty cycle of AOM on the optical system is determined by modeling and experiment. The duty cycle is the main factor affecting the n
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Wu, Xinyang, Dongdong Wang, Di Song, et al. "Influence of Opening Time Interval of Gate Signals on Suppression of Horizontally Polarized Signal of Infrared Pulsed Laser." Materials 17, no. 21 (2024): 5276. http://dx.doi.org/10.3390/ma17215276.

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Since the beginning of the 21st century, infrared Nd:YVO4 pulsed lasers have been widely applied, especially in some actual industrial processes. In the working process of a laser-aided etching device, the “match-head” effect must be effectively controlled by suppressing the first giant pulse for a solid-state Q-switched laser. In the process of optimizing the infrared Nd:YVO4 pulsed laser by adjusting the slope parameters of the radio frequency (RF) modulation to suppress the first giant pulse, it has been found that an abnormal horizontally polarized emission with a very short time appears b
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Palato, Samuel, Philipp Schwendke, Nicolai B. Grosse, and Julia Stähler. "Pseudoheterodyne near-field imaging at kHz repetition rates via quadrature-assisted discrete demodulation." Applied Physics Letters 120, no. 13 (2022): 131601. http://dx.doi.org/10.1063/5.0087187.

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Scattering-type scanning near-field optical microscopy enables the measurement of optical constants of a surface beyond the diffraction limit. Its compatibility with pulsed sources is hampered by the requirement of a high-repetition rate imposed by lock-in detection. We describe a sampling method, called quadrature-assisted discrete (quad) demodulation, which circumvents this constraint. Quad demodulation operates by measuring the optical signal and the modulation phases for each individual light pulse. This method retrieves the near-field signal in the pseudoheterodyne mode, as proven by retr
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González, Ernesto, Juan Casanova-Chafer, Aanchal Alagh, et al. "On the Use of Pulsed UV or Visible Light Activated Gas Sensing of Reducing and Oxidising Species with WO3 and WS2 Nanomaterials." Sensors 21, no. 11 (2021): 3736. http://dx.doi.org/10.3390/s21113736.

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This paper presents a methodology to quantify oxidizing and reducing gases using n-type and p-type chemiresistive sensors, respectively. Low temperature sensor heating with pulsed UV or visible light modulation is used together with the application of the fast Fourier transform (FFT) to extract sensor response features. These features are further processed via principal component analysis (PCA) and principal component regression (PCR) for achieving gas discrimination and building concentration prediction models with R2 values up to 98% and RMSE values as low as 5% for the total gas concentrati
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Pesonen, Henri, Kimmo Saastamoinen, Matias Koivurova, Tero Setälä, and Jari Turunen. "Temporal coherence modulation of pulsed, scalar light with a Fabry–Pérot interferometer." Journal of the Optical Society of America A 36, no. 7 (2019): 1137. http://dx.doi.org/10.1364/josaa.36.001137.

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Berndt, Klaus W., Ignacy Gryczynski, and Joseph R. Lakowicz. "Phase‐modulation fluorometry using a frequency‐doubled pulsed laser diode light source." Review of Scientific Instruments 61, no. 7 (1990): 1816–20. http://dx.doi.org/10.1063/1.1141099.

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Dissertations / Theses on the topic "Pulsed light modulation"

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González, Fernández Ernesto. "Low-power techniques for wireless gas sensing network applications: pulsed light excitation with data extraction strategies." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/672792.

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Aquesta tesi està enfocada en dues línies d'investigació. La primera aborda el desenvolupament d'una metodologia basada en llum polsada per modulació de sensors químic-resistius per a l'extracció d'informació del senyal transitòri, i la segona planteja la implementació d'una xarxa sense fils de sensors (WSN) basada en tecnologia LoRa per al monitoratge de la qualitat de l'aire (AQM) i la detecció d'esdeveniments de fuita de gasos. Aquest document està estructurat en quatre capítols organitzats de la següent manera: el Capítol 1 presenta l'estat de l'art, una introducció als mecanismes de
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Mbanda, Nsoungui Gaelle Carine. "Spectral and temporal modulation and characterization of femtosecond ultra-short laser pulses." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71883.

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Thesis (MSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Ultra-short laser pulses are useful in materials processing like melting and cutting metals, and medical applications such as surgery and many other fields. In this study, we characterize and control the temporal shape of the ultra-short pulses generated from a Ti:Sapphire femtosecond laser. It operates in the near infra-red spectral region, with a centre wavelength of 800 nm. The 4f pulse shaper is the main setup used to modulate spectral shape and characterize the laser pulse. The shaper consists of two diffraction gratin
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Buhafa, Adel Mohamed. "Investigation and implementation of dicode pulse position modulation over indoor visible light communication system." Thesis, University of Huddersfield, 2015. http://eprints.hud.ac.uk/id/eprint/26166/.

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A visible light communication (VLC) system with green technology is available and enables users to use white LEDs for illumination as well as for high data rate transmission over wireless optical links. In addition, LEDs have advantages of low power consumption, high speed with power efficiency and low cost. Therefore, a great deal of research is considered for indoor VLC, as it offers huge bandwidth whilst using a significant modulation technique. This thesis is concerned with the investigation and implementation of the dicode pulse position modulation (DiPPM) scheme over a VLC link using whi
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Břoušek, Adam. "Řízení světelných zdrojů s LED." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-433273.

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This thesis deals with design of devices for control and regulation of LEDs. The document summarizes basic information about light, its origin and variety. This work discusses the effects of light on humans. There are also discussed the possibilities of lighting control with LEDs. The work includes a diagram that describes a device for controlling and controlling light for daylight and night light.
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Yeago, Taylor Craig. "A Two-Phase Buck Converter with Optimum Phase Selection for Low Power Applications." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51230.

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Power consumption of smart cameras varies significantly between sleep mode and active mode, and a smart camera operates in sleep mode for 80 — 90% of time for typical use. To prolong the battery life of smart cameras, it is essential to increase the power converter efficiency for light load, while being able to manage heavy load. The power stage of traditional buck converter is optimized for maximum load, at the cost of light-load efficiency. Wei proposed a multiphase buck converter incorporating the baby-buck concept and optimum number of phases (ONP) control. This thesis research investigate
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Rudhall, Andrew Peter. "Ultrashort laser pulse shaping for novel light fields and experimental biophysics." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3682.

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Broadband spectral content is required to support ultrashort pulses. However this broadband content is subject to dispersion and hence the pulse duration of corresponding ultrashort pulses may be stretched accordingly. I used a commercially-available adaptive ultrashort pulse shaper featuring multiphoton intrapulse interference phase scan technology to characterise and compensate for the dispersion of the optical system in situ and conducted experimental and theoretical studies in various inter-linked topics relating to the light-matter interaction. Firstly, I examined the role of broadband ul
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Alsolami, Ibrahim. "Visible light communications with single-photon avalanche diodes." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:744eeb47-8bb6-4776-8b8f-f7b6374d89bd.

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This thesis explores the use of single-photon avalanche diodes (SPADs) for visible light communications (VLC). The high sensitivity of SPADs can potentially enhance the performance of VLC receivers. However, a SPAD-based system has challenges that need to be addressed before it can be considered as a viable option for VLC. The first challenge is the susceptibility of SPAD-based receivers to variations in ambient light. The high sensitivity of SPADs is advantageous for signal detection, but also makes SPADs vulnerable to variations in ambient light. In this thesis, the performance of a SPAD-bas
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Cassidy, Brian Michael. "A Constant ON-Time 3-Level Buck Converter for Low Power Applications." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/73211.

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Smart cameras operate mostly in sleep mode, which is light load for power supplies. Typical buck converter applications have low efficiency under the light load condition, primarily from their power stage and control being optimized for heavy load. The battery life of a smart camera can be extended through improvement of the light load efficiency of the buck converter. This thesis research investigated the first stage converter of a car black box to provide power to a microprocessor, camera, and several other peripherals. The input voltage of the converter is 12 V, and the output voltage is 5
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Бондарець, Олександр Васильович, та Oleksandr Bondarets. "Кінетика післясвічення світлодіодів". Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, 2019. http://elartu.tntu.edu.ua/handle/lib/29572.

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The master's thesis describes the method of studying the kinetics of the afterglow of LEDs. The block diagram of the experimental setup is considered. The results of measurements of the afterglow of LEDs of different spectral composition and the LED matrix on their basis are presented. Based on the obtained results, the pulse repetition rate of 400 kHz with different degree of filling of the periodic pulse signal was selected. The dependence of the light flux at pulsed power on the PWM parameters of the supply voltage is investigated. The feasibility study of the transition from incandescent a
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Martins, Renato Juliano. "Estudo das propriedades ópticas não-lineares de semicondutores através da formatação de pulsos." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-24052017-142249/.

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Técnicas de formatação de pulsos permitem o controle das propriedades espectrais e temporais de um feixe laser criando novas possibilidades de estudo da interação luz-matéria. Neste trabalho estudamos as propriedades ópticas não-lineares via formatação de pulsos ultracurtos de três semicondutores: Óxido de Zinco, Silício e Nitreto de Gálio; em três abordagens diferentes. Discutimos também as consequências da distorção de fase em processos não lineares devido à natureza discreta do dispositivo modulador. Primeiramente, investigamos a otimização da emissão excitônica em um cristal de Óxido de Zi
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Books on the topic "Pulsed light modulation"

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Salgals, Toms. Development and Assessment of a Spectrally Efficient Hybrid Optical Communication Systems. RTU Press, 2022. http://dx.doi.org/10.7250/9789934228056.

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Thesis describes the wavelength division multiplexed fiber optic communication systems, i.e., assessment of the development of PON and DCI. Experimentally evaluate the application of spectrally efficient multi-level pulse amplitude modulation formats to increase the performance of PON, DCI and RoF solutions for 5G and beyond implementation. Application of SDM technology for the implementation of a spectrally and spatial efficient wavelength division multiplexed FOTS is evaluated. Spectrally efficient next-generation optical system for the transmission of millimeter-wave radio signals over fibe
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Book chapters on the topic "Pulsed light modulation"

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Iga, Kenichi. "Modulation and Light Pulse Generation." In Fundamentals of Laser Optics. Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2482-3_12.

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Gaynor, James D., Ashley P. Fidler, Yen-Cheng Lin, Nicolette G. Puskar, Daniel M. Neumark, and Stephen R. Leone. "Dynamics via Attosecond Four-Wave Mixing." In Springer Proceedings in Physics. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-47938-0_5.

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AbstractAttosecond four-wave mixing spectroscopy is a relatively new technique for studying ultrafast dynamics of highly excited states with exquisite temporal precision and spectral resolution. The attosecond four-wave mixing technique, as described in this paper, uses non-collinear beam geometries of one attosecond pulse together with two optical pulses to obtain background-free, spatially isolated emission signals in the extreme ultraviolet range that directly resolve coherent dynamics in the time domain. This method is advantageous by avoiding the strong spectral modulations that often com
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Jyothi and Ponnambalam Pathipooranam. "Hybrid Variable Length Partial Pulse Modulation for Visible Light Communication." In Advances in Intelligent Systems and Computing. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-15-0035-0_44.

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Das, Sandip, and Soumitra Kumar Mandal. "Multi-header Pulse Interval Modulation (MH-PIM) for Visible Light Communication System." In Advances in Intelligent Systems and Computing. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0224-4_26.

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Yoshiyama, H., Y. Shio, A. Imaizumi, et al. "A Method of Evaluation of Ultrashort Light Pulses Based on Self-Phase Modulation." In Ultrafast Phenomena VI. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83644-2_44.

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Stankov, K. A., and V. P. Tzolov. "Self-Phase Modulation of Ultrashort Light Pulses in the Second-Harmonic Nonlinear Mirror." In Laser in der Technik / Laser in Engineering. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-662-08251-5_180.

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Li, Xiujian, Xiaoguang Hou, Yongming Nie, Wenhua Hu, Jiankun Yang, and Junbo Yang. "Analyze the Discrete Photo-Induced Current Pulses of the Photorefractive Spatial Light Modulator." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10442-8_14.

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Binjrajka, V., C. C. Chang, A. W. R. Emanuel, D. E. Leaird, and A. M. Weiner. "“Pulse Shaping” of Incoherent Light by Use of a Liquid Crystal Modulator Array." In Springer Series in Chemical Physics. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80314-7_11.

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Brinkløv, Signe M. M., Lasse Jakobsen, and Lee A. Miller. "Echolocation in Bats, Odontocetes, Birds, and Insectivores." In Exploring Animal Behavior Through Sound: Volume 1. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-97540-1_12.

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AbstractIn this chapter, the authors review basic concepts about echolocation, the variety of animals known to echolocate, the production of echolocation signals, the different types of echolocation signals, the hearing anatomy, and how echolocating animals use echolocation. The differences between echolocation signals in air versus water are discussed. Echolocation abilities have been studied intensively in bats and toothed whales, the two groups with the most sophisticated echolocation systems in terms of physiological specializations and performance. Echolocation has also been documented in
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Hazu, K., T. Tanigawa, N. Nakagawa, et al. "Two Dimension Spatial Light Modulator with an Over-Two-Octave Bandwidth for High-Powered Monocycle Optical Pulses." In Springer Series in Chemical Physics. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-95946-5_291.

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Conference papers on the topic "Pulsed light modulation"

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Krakowski, M., A. Kwaśny, and G. Soboń. "Femtosecond pulse amplification assisted with spectral phase modulation." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jw2a.50.

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This experiment aimed to improve the pulse shape and the pulse duration, with phase modulation of the seed laser pulse with spatial light modulator before amplifier stage and the employment of Artificial Intelligence algorithms.
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Rezaei, Tahereh, Chitra Vadlamani, Amir Kalev, and Jonathan L. Habif. "Quantum Pulse Position Modulation using Entangled States for Communication Security." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jw2a.86.

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Introducing Quantum Pulse Position Modulation (QPPM): an entanglement-based, secure pulse position modulation approach using two-mode entangled light and ther-mal noise for stealthy data transmission. Quantum bounds ensure secure symbol decoding, baffling eavesdroppers.
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Pereira, João Manoel Barbosa, Daniel Spegel-Lexne, Alvaro Alarcón, et al. "All-fiber Optical Pulse Storage Using Poled Fiber Modulators." In CLEO: Science and Innovations. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_si.2024.sm1b.1.

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An all-fiber setup to store and retrieve light pulses using electric control is presented. The experiment is based on a Sagnac interferometer with a phase modulator fabricated using a poled fiber with internal electrodes.
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Zheludev, N. I., I. S. Ruddock, and R. Illingworth. "Light by light modulation and subharmonic generation in semiconductor-doped glass." In Optical Bistability. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/obi.1988.we.3.

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Semiconductor-doped glasses (SDG) are materials with large third order susceptibilities and have been the subject of intensive investigation during the past few years. Data on their nonlinear optical properties and relaxation parameters have previously been obtained by means of pulsed nano-, pico- and femto-second lasers. For this reason some relatively slow optical nonlinearities of SDG have not been examined. This paper presents the results of an experimental study of a CdSxSe1-x SDG light by light modulator using a pump-probe technique. Laser induced darkening and clearing with a millisecon
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Ruddock, I. S., R. Illingworth, and N. I. Zheludev. "Darkening and clearing and light by light modulation in semiconductor-doped glass." In Nonlinear Optical Properties of Materials. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/nlopm.1988.mf10.

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Semiconductor-doped glasses (SDGs), consisting of small (~100Å) inclusions of CdSxSel-x in silicate glass and commercially available as sharp cut-off filters, are the subject of intensive investigation. They are materials with large effective third order susceptibilities at wavelengths near the band-edge and are suitable for optical phase conjugation and four wave mixing [1]. Data on their nonlinear optical properties and relaxation parameters have previously been obtained by means of pulsed nano-, pico- and femto-second lasers [2,3,4]. For this reason relatively slow optical nonlinearities of
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Chen, Yijiang, and Javid Atai. "Dark Optical Bullets in Light Self Trapping." In Nonlinear Guided Waves and Their Applications. Optica Publishing Group, 1995. http://dx.doi.org/10.1364/nlgw.1995.nfa8.

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Propagation of a light beam in a nonlinear medium has been a subject of great interest over the last three decades. In a uniform medium, the nonlinearity has been shown to have such an effect to offset the diffraction of a beam, leading to the stationary propagation of a CW wave.1-6 In an optical fiber where a light beam is bounded by the linear guiding structure, the nonlinearity can produce a balancing effect to the dispersion of a pulsed beam to yield the stationary propagation of the pulse.7,8 In most experimental situations of light self trapping, pulsed lasers are used as sources for exc
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Sakadzic, Sava, and Lihong V. Wang. "Analytical model for modulation of diffuse light by pulsed ultrasonic waves." In Biomedical Optics 2005, edited by Alexander A. Oraevsky and Lihong V. Wang. SPIE, 2005. http://dx.doi.org/10.1117/12.589432.

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Berndt, Klaus W., Ignacy Gryczynski, and Joseph R. Lakowicz. "Phase-modulation fluorometry using a frequency-doubled pulsed laser diode light source." In OE/LASE '90, 14-19 Jan., Los Angeles, CA, edited by Joseph R. Lakowicz. SPIE, 1990. http://dx.doi.org/10.1117/12.17758.

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Yarrison-Rice, Jan M., Gregory J. Salamo, William W. Clark, Edward J. Sharp, Gary L. Wood, and Ratnakar R. Neurgaonkar. "Measurements of photorefractive response times with low-irradiance picosecond and cw light sources." In OSA Annual Meeting. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/oam.1991.mu2.

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Following Valley’s work,1 the theoretical expression for the space-charge field’s (Esc) buildup is derived for both cw and picosecond-pulsed low-irradiance excitation, I ≫ Isat, where Isat is the intensity at which the number of excited charges saturates. The cw and picosecond-pulsed expressions for the time-dependent Esc both reduce to where m is the modulation index of the grating and τdi is the dielectric relaxation time. An explanation of how saturation affects the growth of the space-charge field for cw vs picosecond- pulsed excitation is presented. The differential equation for the space
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Kamanina, N. V., and V. V. Danilov. "Investigation on Relaxation of Light-Induced Holographic Grating in Resonant Liquid-Crystal Medium." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.cwf34.

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On interaction of laser pulsed irradiation with a liquid-crystal (LC), a number of phenomena associated with nonlinear orientation effects, thermal modulation of refractive index, and conformational photo-conversion of molecules can arise.
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