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Journal articles on the topic 'Pulse chirp'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Walker, Sean E., and William H. Cade. "The effects of temperature and age on calling song in a field cricket with a complex calling song, Teleogryllus oceanicus (Orthoptera: Gryllidae)." Canadian Journal of Zoology 81, no. 8 (2003): 1414–20. http://dx.doi.org/10.1139/z03-106.

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We examined the effects of temperature and age on calling song in the field cricket Teleogryllus oceanicus. Teleogryllus oceanicus has a complex calling song made up of two different kinds of chirp, long and short. The long chirp is made up of three to eight single pulses of sound and the short chirp consists of several paired pulses. The properties of T. oceanicus calling song did not vary with age, but almost every property of the song varied with temperature. Pulse duration, interpulse interval, and pulse rate in both the long and the short chirp varied with temperature. The number of pulse

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2

Jacob, Pedro F., and Berthold Hedwig. "Modular timer networks: abdominal interneurons controlling the chirp and pulse pattern in a cricket calling song." Journal of Comparative Physiology A 206, no. 6 (2020): 921–38. http://dx.doi.org/10.1007/s00359-020-01448-0.

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Abstract Chirping male crickets combine a 30 Hz pulse pattern with a 3 Hz chirp pattern to drive the rhythmic opening-closing movements of the front wings for sound production. Lesion experiments suggest two coupled modular timer-networks located along the chain of abdominal ganglia, a network in A3 and A4 generating the pulse pattern, and a network organized along with ganglia A4–A6 controlling the generation of the chirp rhythm. We analyzed neurons of the timer-networks and their synaptic connections by intracellular recordings and staining. We identified neurons spiking in phase with the ch

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3

Wang, Wen Bin, Dao Yuan Liu, and Yu Qin Yao. "Study of Transmission Characteristics of Optical Pulse in the Dispersive Fiber." Applied Mechanics and Materials 513-517 (February 2014): 2775–77. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.2775.

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Chromatic dispersion and nonlinearity effect are the two important factors affecting the optical pulse which propagates in the optical fiber. The former makes the pulse broaden, the latter mainly broaden pulse spectrum. Therefore, the linear and nonlinear dispersive propagation and control of optical pulses in the fiber has always been an important research topic of concern. In this paper, Starting from the nonlinear Schrodinger equation of the optical pulse and neglecting the chromatic dispersion, under the situation of chirp and chirp-free Gaussian pulse, we analytical analyzed, calculated a

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4

Zhong, Zhicheng, Wenqi Gong, Hao Jiang, Honggang Gu, Xiuguo Chen, and Shiyuan Liu. "Investigation of Spatial Chirp Induced by Misalignments in a Parallel Grating Pair Pulse Stretcher." Applied Sciences 10, no. 5 (2020): 1584. http://dx.doi.org/10.3390/app10051584.

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Spatial chirp induced by the misaligned gratings and mirrors in a parallel grating pair pulse stretcher can significantly affect the performance of the output pulses. Firstly, a detailed analysis about the spatial chirp of the stretched pulses caused by the misalignments has been carried out using the ray tracing simulation method. According to the simulation results, an adjustment procedure has been summarized to accurately calibrate these misalignments. The proposed method has been successfully applied in a home-made chirped pulse stretcher. By measuring the output pulse with an imaging spec

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5

Liu, Hui, Hang Liu, and Liqiang Feng. "Isolated attosecond pulse generation from different frequency-chirping combined fields." International Journal of Modern Physics B 33, no. 21 (2019): 1950241. http://dx.doi.org/10.1142/s0217979219502412.

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Generation of high-order harmonic spectrum and isolated attosecond pulse (IAP) from frequency-chirping combined field has been investigated. It is found that by adding the middle-chirp form of the laser field, the extension of the harmonic cutoff comes from the middle region of the laser field. However, the intensity of the higher-order spectral continuum is very low. By adding the asymmetric negative chirp form of the laser field, the extension of the harmonic cutoff is attributed to the falling region of the laser field. Moreover, the intensity of the higher-order spectral continuum presents

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6

Nie, Yong Ming, Ya Kun Guo, Feng Lei TAN, and Fuan Sun. "Both Spatial and Temporal Distortions Caused by Spatial Chirp in Vortex Femtosecond Pulse Beams." Advanced Materials Research 986-987 (July 2014): 1763–66. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.1763.

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Spatial chirp will cause temporal width broadening and wave front aberration with the femtosecond pulse beam. So effectively controlling and utilizing the spatial chirp has great significance. In this manuscript, the properties of the spatial chirp are theoretically investigated. An experimental setup which can easily control the spatial chirp of the femtosecond laser pulse beam and generate vortex femtosecond pulse beam with different spatial chirp parameters is proposed. The relationships between the spatial chirp and the temporal and spatial properties including the cross section intensity

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7

Hedwig, Berthold, and Edith Julieta Sarmiento-Ponce. "Song pattern recognition in crickets based on a delay-line and coincidence-detector mechanism." Proceedings of the Royal Society B: Biological Sciences 284, no. 1855 (2017): 20170745. http://dx.doi.org/10.1098/rspb.2017.0745.

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Acoustic communication requires filter mechanisms to process and recognize key features of the perceived signals. We analysed such a filter mechanism in field crickets ( Gryllus bimaculatus ), which communicate with species-specific repetitive patterns of sound pulses and chirps. A delay-line and coincidence-detection mechanism, in which each sound pulse has an impact on the processing of the following pulse, is implicated to underlie the recognition of the species-specific pulse pattern. Based on this concept, we hypothesized that altering the duration of a single pulse or inter-pulse interva

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8

Munaweera, P. C. T., and K. A. I. L. Wijewardena Gamalath. "Simulation of Pulse Propagation in Optical Fibers." International Letters of Chemistry, Physics and Astronomy 64 (February 2016): 159–70. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.64.159.

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A theoretical model was developed for light pulses propagating in optical fibers by considering the nonlinear effects, the self-phase modulation and group velocity dispersion effects. The split step Fourier method was used to generate soliton pulses in a fiber composed of a glass core surrounded by a cladding layer. Gaussian and hyperbolic secant input pulses were used for the simulation. By varying the initial chirp, input power and nonlinear coefficient for an input Gaussian pulse at wavelength of λ =1.55μm with initial pulse width 125ps for second order dispersion β2=−20 ps2km-1, nonlinear

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9

Köck, Matthias, Rainer Kerssebaum, and Wolfgang Bermel. "A broadband ADEQUATE pulse sequence using chirp pulses." Magnetic Resonance in Chemistry 41, no. 1 (2002): 65–69. http://dx.doi.org/10.1002/mrc.1097.

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10

Liu, Hang, Henry M. Schafer, R. L. Q. Feng, and A. Yuanzi Feng. "Generation of water window single attosecond pulse from multi-cycle mid-infrared laser field with chirp gating modulation." Modern Physics Letters B 33, no. 06 (2019): 1950064. http://dx.doi.org/10.1142/s0217984919500647.

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A potential scheme to produce the water window single attosecond pulses (SAPs) from the multi-cycle mid-infrared (MIR) laser field has been investigated with the help of the chirp gating modulation. It is found that with the introduction of the laser chirp (i.e. up-chirp or down-chirp modulation), the extension of the harmonic cutoff can be achieved and the single harmonic radiation peak (HRP) can be selected during the harmonic emission process. Moreover, the chirp gating modulation on the high-order harmonic generation (HHG) is sensitive to the few-cycle pulse duration, but it is not very se

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11

Bender, Daniel A., Michael P. Hasselbeck, and Mansoor Sheik-Bahae. "Sensitive ultrashort pulse chirp measurement." Optics Letters 31, no. 1 (2006): 122. http://dx.doi.org/10.1364/ol.31.000122.

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12

Chen, Runzhi, Zhuo Shi, and Guoqing Chang. "Pre-Chirp-Managed Adiabatic Soliton Compression in Pressure-Gradient Hollow-Core Fibers." Photonics 8, no. 9 (2021): 357. http://dx.doi.org/10.3390/photonics8090357.

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Post-pulse-compression is demanded to produce energetic few-cycle pulses. We propose pre-chirp-managed adiabatic soliton compression (ASC) in gas-filled pressure-gradient hollow-core fibers to suppress the detrimental pedestals and therefore significantly improve the compressed pulse quality. We show that two-stage ASC can compress 125 μJ, 130 fs pulses at 2 μm to a nearly two-cycle pulse 15 fs in duration. Our analytical analysis suggests that ASC is in favor of compressing pulses centered at a longer wavelength. As an example, a 280 μJ, 220 fs Gaussian pulse at 4 μm is compressed to 60 fs wi

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13

Buhaiov, M. V., and S. P. Samoilyk. "RANGE AND RADIAL VELOCITY MEASUREMENT AMBIGUITY ELIMINATION WITH TRAINS OF MULTICOMPONENT SIGNALS." Проблеми створення, випробування, застосування та експлуатації складних інформаційних систем, no. 18 (December 30, 2020): 91–100. http://dx.doi.org/10.46972/2076-1546.2020.18.09.

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When designing pulse-Doppler radar, one of the key points is the choice of the pulse repetition period, which determines the boundaries of unambiguous measurement of range and radial velocity and creates contradictions in the measurement of these values. This contradiction is especially acute in the analysis of signals reflected from the propellers and turbines of aircraft. The main approaches to solving the problem of expanding the boundaries of unambiguous measurement of range and radial velocity is the use of variable pulse repetition period and the creation of signal ensembles to separate

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14

ABOBAKER, ABDOSLLAM M., A. B. MOUBISSI, TH B. EKOGO, and K. NAKKEERAN. "ANALYTICAL SOLUTIONS FOR THE VARIATIONAL EQUATIONS DERIVED FOR THE NONLINEAR SCHRÖDINGER EQUATION: DISPERSION-MANAGED FIBER SYSTEM." Journal of Nonlinear Optical Physics & Materials 17, no. 03 (2008): 285–97. http://dx.doi.org/10.1142/s0218863508004226.

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We consider the nonlinear Schrödinger equation which governs the pulse propagation in dispersion-managed (DM) optical fiber transmission systems. Using a generalized form of ansatz function for the shape of the pulse, we derive the variational equations. For a particular case of DM fiber systems when the Hamiltonian is zero, we solve the variational equations analytically and obtain the expressions for the pulse energy, amplitude, width and chirp. Finally for Gaussian and hyperbolic secant shaped pulses, we show through numerical simulations that the analytically calculated energy (for the giv

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15

Kien, Bui Xuan, Tran Hai Hung, and Trinh Dinh Chien. "Influence of the Frequency-chirp Gaussian Pulse on the Pulse Broadening in %the Dispersive Fibers." Communications in Physics 23, no. 1 (2013): 85. http://dx.doi.org/10.15625/0868-3166/23/1/2897.

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A signal optical pulse propagating in the fiber is affected by many factors, one of the most important among them is dispersion. Under the dispersive influence, the optical pulse is reshaped, particulally, its duration is changed. Especially, the pulse duration change of the optical short pulse with the frequency-chirp is unregular. It influences to the propagating distance in the fiber optic network.In this paper, the expression of the signal optical pulse with the frequency-chirp propagated through the dispersive fiber is derived. This expression described the broadening of the pulse in prop

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16

Kien, Bui Xuan, Tran Hai Hung, and Trinh Dinh Chien. "Influence of the Frequency-chirp Gaussian Pulse on the Pulse Broadening in %the Dispersive Fibers." Communications in Physics 23, no. 1 (2013): 85. http://dx.doi.org/10.15625/0868-3166/23/1/2898.

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A signal optical pulse propagating in the fiber is affected by many factors, one of the most important among them is dispersion. Under the dispersive influence, the optical pulse is reshaped, particulally, its duration is changed. Especially, the pulse duration change of the optical short pulse with the frequency-chirp is unregular. It influences to the propagating distance in the fiber optic network.In this paper, the expression of the signal optical pulse with the frequency-chirp propagated through the dispersive fiber is derived. This expression described the broadening of the pulse in prop

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17

Chen, H. Y., S. J. Huang, Q. Song, and P. X. Wang. "Investigation on a field description of the chirped laser pulse." Modern Physics Letters B 30, no. 06 (2016): 1650052. http://dx.doi.org/10.1142/s0217984916500524.

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Starting from a first-order approximate field description function for laser pulses, the method currently used to approximate chirped laser pulse (CLP) substitutes frequency and wave vector related variables with spatiotemporally varying functions. We investigated the error involved by calculating the relative deviation from Maxwell equations. Errors for the electric and magnetic fields are analyzed separately, and behaviors related to parameter changes (that is, in laser width, pulse duration and chirp parameter) were studied. Results show that aberration associated with currently used field-

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18

Liu, H., L. Q. Feng, and R. M. Sani. "Effects of inhomogeneous laser field in time and space on the generation of broad spectral continuum and ultrashort attosecond pulse." Modern Physics Letters B 34, no. 13 (2020): 2050131. http://dx.doi.org/10.1142/s0217984920501316.

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The inhomogeneous effects of laser field in time and space on the generations of high-order harmonic spectra and attosecond pulses from He atom have been investigated with the assistance of the frequency-chirping technique and the metallic nanostructure. We find that in different combinations of chirps and spatial inhomogeneous effects, not only can the harmonic cutoff be extended, but the single harmonic emission peak (HEP) can also be selected to contribute to the spectral continuum. In detail, with the combinations of (i) symmetric chirp in frequency and positive inhomogeneous effect in spa

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19

Masoud Mohebbi, Masoud Mohebbi, and Saeed Batebi Saeed Batebi. "Generation of 40-as few-cycle pulse through chirp manipulation." Chinese Optics Letters 10, no. 8 (2012): 081901–81903. http://dx.doi.org/10.3788/col201210.081901.

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20

Sun, Tie Ju, Xin Lou, Fang Zhen Duan, and Cheng Li Li. "Both Theoretical and Experimental Analysis of Temporal and Spatial Chirp of Femtosecond Pulse Beam in a Prism Pair." Applied Mechanics and Materials 556-562 (May 2014): 4514–17. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.4514.

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Spatial and temporal chirp will effects a pulse both in space and in time domains. So effectively controlling and utilizing the spatial and temporal chirp has great significance. In this manuscript, firstly the dispersion properties of the prism pair is theoretical analyzed, and the phase delay second derivative expression of the thin prism is obtained. Then a setup is demonstrated to experimentally investigate the spatial and temporal properties of the femtosecond pulse beam. The spatial chirp and temporal chirp effects on the femtosecond pulse beam are experimentally obtained. Both theoretic

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21

Feng, Li-Qiang, and Li Liu. "Control of the half-cycle harmonic emission process for generating the intense and ultrashort single attosecond pulses (SAPs)." Zeitschrift für Naturforschung A 75, no. 11 (2020): 903–11. http://dx.doi.org/10.1515/zna-2020-0170.

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AbstractIn this paper, the half-cycle harmonic generation process has been controlled by using the asymmetric inhomogeneous chirped pulse combined with the ultraviolet (UV) pulse. It is found that by properly optimizing the chirps and chirp delays of the fundamental two-color pulse, the optimal negative and positive half-cycle laser profiles for the harmonic cutoff extension can be obtained. Further, with the introduction of the negative and positive inhomogeneous effect, respectively, the harmonic cutoff from the negative and positive half-cycle laser profiles can be further improved. Next, w

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22

Ouellette, François, Zhonghua Ou, and Jianfeng Li. "Dual Wavelength Differential Detection of Fiber Bragg Grating Sensors with a Pulsed DFB Laser." Sensors 20, no. 17 (2020): 4766. http://dx.doi.org/10.3390/s20174766.

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We show how dual wavelength differential detection can be used to measure fiber Bragg grating sensors using nanosecond pulses from a single DFB laser diode, by taking advantage of its dynamic chirp. This can be performed in two ways: by measuring the reflected power from two separate pulses driven by two different currents, or by taking two delayed digitized samples within a single pulse. A prototype instrument using fast digitizing and processing with an FPGA is used to characterize the chirp, from which the performance can be optimized for both measurement schemes.

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23

Feng, Liqiang, Wenliang Li, and Hang Liu. "Intensity enhancement of attosecond XUV pulse by using asymmetric inhomogeneous mid-infrared down-chirped field." International Journal of Modern Physics B 31, no. 26 (2017): 1750185. http://dx.doi.org/10.1142/s0217979217501855.

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Intensity enhancement of the attosecond pulse generation from the high-order harmonic spectra has been theoretically investigated through solving the three-dimensional time-dependent Schrödinger equation. It is found that with the introduction of the down-chirped pulse, the temporal frequency of the down-chirp region is decreased. As a result, the ionized electrons can receive much more energy during its acceleration in this region, showing the extension of the harmonic cutoff. Moreover, due to the multi-harmonic emission events contribute to the higher harmonics, the intensity of the harmonic

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Ivanov Spassov, Sevdalin. "CHIRP FILTER JAMMING IMMUNITY RESEARCH." International Journal of Advanced Research 9, no. 01 (2021): 966–71. http://dx.doi.org/10.21474/ijar01/12377.

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The pulse compression technique uses a matched filter to extract an echo signal in the radars receiver. A model of a matched filter for a chirp signal was synthesized using the Simulink Tool of the MATLAB software. Pulse jamming and chirp jamming signals were feed to the input of the matched filter. The output signals were measured. The matched filters degree of suppression of these jamming signals was assessed. Conclusions were made about the jamming immunity of a radar operating with a Chirp matched filter.

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25

Kabelka, Vidmantas. "Simple ultrashort light pulse chirp measurement device." Lithuanian Journal of Physics 45, no. 5 (2005): 369–72. http://dx.doi.org/10.3952/lithjphys.45513.

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26

Hernández-García, C., and L. Plaja. "Off-axis compensation of attosecond pulse chirp." Journal of Physics B: Atomic, Molecular and Optical Physics 45, no. 7 (2012): 074021. http://dx.doi.org/10.1088/0953-4075/45/7/074021.

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27

Kaschke, M., B. Wilhelmi, V. D. Egorov, H. X. Nguyen, and R. Zimmermann. "Pump-pulse induced chirp production in semiconductors." Applied Physics B Photophysics and Laser Chemistry 45, no. 2 (1988): 71–75. http://dx.doi.org/10.1007/bf00694318.

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Sarkar, Sambeda, Rudra N. Purusottam, Ashutosh Kumar та Navin Khaneja. "Chirp pulse sequences for broadband π rotation". Journal of Magnetic Resonance 328 (липень 2021): 107002. http://dx.doi.org/10.1016/j.jmr.2021.107002.

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29

Rajan, M. S. Mani. "Unexpected Behavior on Nonlinear Tunneling of Chirped Ultrashort Soliton Pulse in Non-Kerr Media with Raman Effect." Zeitschrift für Naturforschung A 71, no. 8 (2016): 751–58. http://dx.doi.org/10.1515/zna-2016-0187.

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AbstractIn this manuscript, the ultrashort soliton pulse propagation through nonlinear tunneling in cubic quintic media is investigated. The effect of chirping on propagation characteristics of the soliton pulse is analytically investigated using similarity transformation. In particular, we investigate the propagation dynamics of ultrashort soliton pulse through dispersion barrier for both chirp and chirp-free soliton. By investigating the obtained soliton solution, we found that chirping has strong influence on soliton dynamics such as pulse compression with amplification. These two important

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SHARABY, Y. A., A. JOSHI, and S. S. HASSAN. "COHERENT POPULATION TRANSFER IN V-TYPE ATOMIC SYSTEM." Journal of Nonlinear Optical Physics & Materials 22, no. 04 (2013): 1350044. http://dx.doi.org/10.1142/s0218863513500446.

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In this paper, we investigate numerically the modeled density matrix equations for the interaction of a three-level atomic system in V-configuration with a train of chirped optical n-pulses (up to n = 10) within and without the rotating wave approximation. For adopted data of Rb 87, maximal population transfer to either of the upper levels is achieved with n > 1 pulse via variation of chirp parameter/frequency mismatch of the closely lying upper levels. Optimal steady population transfer and maximum atomic coherence of the upper levels are predicted for non-zero chirp parameter and train of

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31

Zolotovskii, I. O., D. I. Sementsov, A. A. Sysolyatin, A. S. Belanov, and M. S. Yavtushenko. "Amplification of Frequency-Modulated Similariton Pulses in Length-Inhomogeneous Active Fibers." International Journal of Optics 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/979632.

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The possibility of an effective gain of the self-similar frequency-modulated (FM) wave packets is studied in the length-inhomogeneous active fibers. The dynamics of parabolic pulses with the constant chirp has been considered. The optimal profile for the change of the group-velocity dispersion corresponding to the optimal similariton pulse amplification has been obtained. It is shown that the use of FM pulses in the active (gain) and length-inhomogeneous optical fibers with the normal group-velocity dispersion can provide subpicosecond optical pulse amplification up to the energies higher than

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Corkeron, Peter J., and Sofie M. Van Parijs. "Vocalizations of eastern Australian Risso's dolphins, Grampus griseus." Canadian Journal of Zoology 79, no. 1 (2001): 160–64. http://dx.doi.org/10.1139/z00-180.

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Recordings were made from a group of Risso's dolphins (Grampus griseus) off the coast of Newcastle, Australia, between 30 Hz and 22 kHz. Risso's dolphins exhibited seven separate vocalisation types: broadband clicks, barks, buzzes, grunts, chirps, whistles, and simultaneous whistle + burst-pulse sounds. Broadband clicks were highly variable in duration, with a frequency range of 6 to >22 kHz. Bark vocalisations consisted of highly variable burst pulses, with durations ranging from 0.2 to 7.4 s and a frequency range of 2-20 kHz. Buzz vocalisations were clearly stereotyped, consisting of a sh

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Klitis, Charalambos, Marc Sorel, and Michael J. Strain. "Active On-Chip Dispersion Control Using a Tunable Silicon Bragg Grating." Micromachines 10, no. 9 (2019): 569. http://dx.doi.org/10.3390/mi10090569.

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Actively controllable dispersion in on-chip photonic devices is challenging to implement compared with free space optical components where mechanical degrees of freedom can be employed. Here, we present a method by which continuously tunable group delay control is achieved by modulating the refractive index profile of a silicon Bragg grating using thermo-optic effects. A simple thermal heater element is used to create tunable thermal gradients along the grating length, inducing chirped group delay profiles. Both effective blue and red chirp are realised using a single on-chip device over nanom

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Fadini, Alisia, Sven Reiche, Karol Nass, and Jasper J. van Thor. "Applications and Limits of Time-to-Energy Mapping of Protein Crystal Diffraction Using Energy-Chirped Polychromatic XFEL Pulses." Applied Sciences 10, no. 7 (2020): 2599. http://dx.doi.org/10.3390/app10072599.

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A broadband energy-chirped hard X-ray pulse has been demonstrated at the SwissFEL (free electron laser) with up to 4% bandwidth. We consider the characteristic parameters for analyzing the time dependence of stationary protein diffraction with energy-chirped pulses. Depending on crystal mosaic spread, convergence, and recordable resolution, individual reflections are expected to spend at least ≈ 50 attoseconds and up to ≈ 8 femtoseconds in reflecting condition. Using parameters for a chirped XFEL pulse obtained from simulations of 4% bandwidth conditions, ray-tracing simulations have been carr

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Al_Dujaili, Mohammed Jawad, and Aws Majeed Al_Awadi. "Chirplet signal design by FPGA." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 3 (2021): 2120. http://dx.doi.org/10.11591/ijece.v11i3.pp2120-2127.

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The ever-expanding growth of the electronics and communications industries present new challenges for researchers. One of these challenges is the generation of the required bandwidth signal over a specific time frame that is used in a variety of contexts, particularly radar systems. To improve the range resolution in the radar along with better SNR, it is necessary to reduce the signal bandwidth and increase the peak power. There are some restrictions for narrowband signals like power limitation, pulse shaping, and the production of unwanted harmonics. So as a solution pulse compression techni

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SOHBATZADEH, F., and S. P. HOSSEINI. "CONTROLLING THE REMOTE IONIZATION DISTANCE BY A LINEARLY CHIRPED FEMTOSECOND LASER PULSE IN AIR." Journal of Nonlinear Optical Physics & Materials 21, no. 04 (2012): 1250046. http://dx.doi.org/10.1142/s0218863512500464.

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In this paper, propagation of a linearly chirped laser pulse in air was investigated to control the remote ionization distance, numerically. Laser spot size and pulse length will be obtained versus effective initial parameters such as positive and negative initial chirp. It is seen that the initial chirp parameter and primary curvature of wave front have important role in focal distance variation and remote ionization. It was also shown that the group velocity dispersion (GVD) could alter and split the positively chirped laser pulse profile after nonlinear self-focusing.

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Smith, Cynthia J., and William H. Cade. "Relative fertility in hybridization experiments using three song types of the held crickets Gryllus integer and Gryllus rubens." Canadian Journal of Zoology 65, no. 10 (1987): 2390–94. http://dx.doi.org/10.1139/z87-359.

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Species-specific calling songs of male field crickets attract conspecific females. Each wing closure results in a pulse of sound, and the song is composed of pulses arranged in species-specific patterns of short chirps, long continuous trills, or intermediates between chirps and trills. California Gryllus integer has a song with pulses of sound delivered in groups of two or three to produce a chirp, but in central Texas, the G. integer song has a variable number of pulses delivered in long continuous trills. Gryllus rubens occurs from eastern Texas to Florida and has a trilling song with a slo

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Prandolini, Mark J., Thomas Gaumnitz, Alexander Kothe, et al. "Minimizing attosecond CEP jitter by carrier envelope phase tuning." EPJ Web of Conferences 205 (2019): 02011. http://dx.doi.org/10.1051/epjconf/201920502011.

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Minimizing the CEP jitter of isolated attosecond pulses (IAP) will be important for future applications. This jitter is experimentally and theoretically investigated and can be minimized when the driving pulse is near its Fourier limit but with slightly negative chirp. Thus, understanding and characterization of the CEP jitter of IAPs is a first step towards exact control of the electric field of IAP pulses.

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Zeng Shuguang, 曾曙光, 张彬 Zhang Bin, 孙年春 Sun Nianchun, and 隋展 Sui Zhan. "Chirp-matching OPCPA scheme for eliminating pre-pulse of ultrashort laser pulse." High Power Laser and Particle Beams 24, no. 2 (2012): 394–98. http://dx.doi.org/10.3788/hplpb20122402.0394.

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Kühlke, D., T. Bonkhofer, and D. von der Linde. "Pulse fluctuations and chirp compensation in colliding-pulse mode-locked dye lasers." Optics Communications 59, no. 3 (1986): 208–12. http://dx.doi.org/10.1016/0030-4018(86)90286-5.

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Zhao, Quan, Ling Tong, and Bo Gao. "Advanced Chirp Transform Spectrometer with Novel Digital Pulse Compression Method for Spectrum Detection." Applied Sciences 11, no. 3 (2021): 960. http://dx.doi.org/10.3390/app11030960.

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Based on chirp transform and pulse compression technology, chirp transform spectrometers (CTSs) can be used to perform high-resolution and real-time spectrum measurements. Nowadays, they are widely applied for weather and astronomical observations. The surface acoustic wave (SAW) filter is a key device for pulse compression. The system performance is significantly affected by the dispersion characteristics match and the large insertion loss of the SAW filters. In this paper, a linear phase sampling and accumulating (LPSA) algorithm was developed to replace the matched filter for fast pulse com

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Liang, A. H., H. K. Tsang, and L. Y. Chan. "Laplacian pulse width, rms chirp, and their applications." Journal of the Optical Society of America B 13, no. 11 (1996): 2464. http://dx.doi.org/10.1364/josab.13.002464.

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Escoto, Esmerando, Rana Jafari, Günter Steinmeyer, and Rick Trebino. "Linear chirp instability analysis for ultrafast pulse metrology." Journal of the Optical Society of America B 37, no. 1 (2019): 74. http://dx.doi.org/10.1364/josab.37.000074.

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Renninger, William H., Andy Chong, and Frank W. Wise. "Giant-chirp oscillators for short-pulse fiber amplifiers." Optics Letters 33, no. 24 (2008): 3025. http://dx.doi.org/10.1364/ol.33.003025.

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El-Shennawy, Khamies M., Onsy Abdel Alim, and Mohamed A. Ezz-El-Arab. "Linear FM chirp filters in pulse compression radars." IEEE Transactions on Instrumentation and Measurement IM-36, no. 3 (1987): 783–88. http://dx.doi.org/10.1109/tim.1987.6312789.

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Teng, Jian, Zong-Qing Zhao, Bin Zhu, et al. "Time-Resolved Radiography using Chirp-Pulse Proton Beams." Chinese Physics Letters 28, no. 3 (2011): 035203. http://dx.doi.org/10.1088/0256-307x/28/3/035203.

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Naganuma, K., K. Mogi, and H. Yamada. "General method for ultrashort light pulse chirp measurement." IEEE Journal of Quantum Electronics 25, no. 6 (1989): 1225–33. http://dx.doi.org/10.1109/3.29252.

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WEISSMAN, DAVID B., DAVID H. FUNK, and THOMAS J. WALKER. "Gryllus mandevillus (Orthoptera: Gryllidae) is a valid field cricket species." Zootaxa 3202, no. 1 (2012): 65. http://dx.doi.org/10.11646/zootaxa.3202.1.5.

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Walker (in Weissman, Walker, & Gray 2009) described a new species of Gryllus, G. jamaicensis, a second species recorded from Jamaica to the widespread G. assimilis (Fabricius 1775). The two taxa are apparent sister species and are morphologically indistinguishable. They can be separated by three calling song characteristics: pulses per chirp, average pulse rate, and dominant frequency.

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Herrera, Rodrigo Acuna, and Carlos A. Rodriguez. "Dependence of the shape of fiber tapers on the nonlinear pulse propagation." Journal of Nonlinear Optical Physics & Materials 25, no. 01 (2016): 1650002. http://dx.doi.org/10.1142/s0218863516500028.

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Using a model for the shape of tapered fiber optics, we numerically study the effect of the taper shape profile on nonlinear optical pulse propagation. We show that super-Gaussian pulses can be generated and controlled and that they are independent of higher-order nonlinearities, which makes them a good candidate for optical communications. We see that it is possible to compensate for the [Formula: see text] variation of the dispersion with the nonlinear parameter and obtain the solutions of the homogeneous nonlinear Schrödinger equation. In addition, pulse collisions can be produced using chi

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Luo, Xiulian, Yunkai Deng, Robert Wang, Lei Guo, and Mingjiang Wang. "Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps." International Journal of Antennas and Propagation 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/161294.

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To simultaneously achieve two-dimensional high resolution and wide swath in synthetic aperture radar (SAR), azimuth MIMO structure combined with stepped-frequency chirp signals was developed via splitting the antenna intoNsubapertures. During transmitting each subaperture transmits a chirp pulse at a different carrier frequency, while during receiving every subaperture receives theNscattered pulses at the same time. Separating theNscattered pulses received by each subaperture and downlinking them to the ground yieldN2different signal paths. Due to the dedicated network in the SAR system, the c

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