Influence of femtosecond pulse duration on shift of central frequency of wave packet

2000 ◽  
Author(s):  
Dmitry K. Skripov ◽  
Vyacheslav A. Trofimov
Keyword(s):  
Wave Packet ◽  
Pulse Duration ◽  
Femtosecond Pulse ◽  
Central Frequency

Femtosecond pulse duration as a tool for controlling high fluence of laser filament in air

2009 ◽  
Author(s):  
Elena P. Silaeva ◽  
Oleg V. Tverskoy ◽  
Valerii P. Kandidov
Keyword(s):  
Pulse Duration ◽  
Femtosecond Pulse ◽  
High Fluence

Femtosecond pulse duration measurements utilizing an ultrafast nonlinearity of nickel

1998 ◽  
Vol 147 (1-3) ◽  
pp. 148-152 ◽  
Author(s):  
P.J. Bennett ◽  
A. Malinowski ◽  
B.D. Rainford ◽  
I.R. Shatwell ◽  
Yu.P. Svirko ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Femtosecond Pulse

Description of an electronic controller used with an autocorrelator to measure a femtosecond pulse duration in real time

1982 ◽  
Vol 53 (7) ◽  
pp. 960-962 ◽  
Author(s):  
A. Kalpaxis ◽  
A. G. Doukas ◽  
Y. Budansky ◽  
D. L. Rosen ◽  
A. Katz ◽  
...  
Keyword(s):  
Real Time ◽  
Pulse Duration ◽  
Femtosecond Pulse ◽  
Electronic Controller

Wave Packet as a Model of Localised Disturbances Propagating along the Cables

2013 ◽  
Vol 208 ◽  
pp. 20-28
Author(s):  
Jacek Snamina
Keyword(s):  
Wave Packet ◽  
Equilibrium State ◽  
Wave Packets ◽  
Linear Equations ◽  
Frequency Range ◽  
Central Frequency

In the paper localised disturbances propagating along the cables are modelled by wave packets. The motion of the cable was described in relation to its equilibrium state. The linear equations were used. Typically disturbances associated with sudden gust of wind are modelled by kinematic generator exciting oscillations in the specified frequency range, concentrated around the central frequency. The packet of binormal waves and coupled packets of normal and tangent waves were considered. The description of the evolution of the wave packets during their motion was presented analytically and numerically in the form of plots.

scholarly journals Photo-elastic Effect Features Used for Measuring Laser Radiation Parameters

2020 ◽  
pp. 17-29
Author(s):  
A. R. Hasanov ◽  
R. A. Hasanov ◽  
A. Q. Huseynov ◽  
E. A. Agayev ◽  
R. A. Ahmadov
Keyword(s):  
Wave Packet ◽  
Elastic Wave ◽  
Pulse Duration ◽  
Direct Detection ◽  
Input Pulse ◽  
Experimental Studies ◽  
Elastic Interaction ◽  
Optical Beam ◽  
Practical Applications ◽  
Elastic Effect

The article discusses the photo-elastic effect features in acousto-optic processors for processing pulse signals on the time axis. The photo-elastic interaction in these devices is divided into two areas. In the first area, the input pulse duration is longer than the time of intersecting the optical beam by the elastic wave packet. This particular area is widely used in the practical applications of these processors, where it is a priori assumed that the input pulse duration is longer than the time for the elastic wave packet to intersect the optical beam.In the second area, the input pulse duration is less than the time for the optical beam to be intersected by the elastic wave packet. The objective of this work is to study the photo-elastic effect features in this area. It was established that in this area the pulse duration at the processor output is equal to the time for the optical beam to be intersected by the elastic wave packet and does not depend on the input pulse duration, which is permissible in some cases (for example, in radar pulse existence rather than its duration is recorded). It is shown that in the second area, the output pulse is formed as the sum of three terms. The first term corresponds to the elastic wave packet entering the optical beam. The second term corresponds to the elastic wave packet advancement in the optical beam aperture, and the third one keeps with the elastic wave packet leaving the aperture of the optical beam. The corresponding equations for calculating the pulse at the device output are obtained. The numerical calculations have proved the provisions and patterns established. The numerical modeling results were tested experimentally using a prototype of an acousto-optic processor with direct detection. The analysed results of theoretical and experimental studies unequivocally confirmed that the obtained formulas, formulated statements, and established provisions can be used to expand the functionality of acousto-optic processors, both with direct detection and of heterodyne type. It is shown that with a significant decrease in the input pulse duration relative to the time during which the optical beam is intersected by the elastic wave packet, the latter is converted into a scanning line and can be used to measure the geometric and energy characteristics of the quasi-coherent light.

Effect of nanosecond and femtosecond pulse duration of laser processing of thin biodegradable polymeric film

2004 ◽  
Author(s):  
K. S. Tiaw ◽  
P. S. Tan ◽  
Ming Hui Hong ◽  
Z. B. Wang ◽  
Swee H. Teoh
Keyword(s):  
Pulse Duration ◽  
Laser Processing ◽  
Femtosecond Pulse ◽  
Polymeric Film

Microchannels Fabricated by Laser: From the Nanosecond to the Femtosecond Pulse Duration

2020 ◽  
Author(s):  
María Aymerich ◽  
Javier Vázquez de Aldana ◽  
David Canteli ◽  
Carlos Molpeceres ◽  
M. Flores-Arias
Keyword(s):  
Pulse Duration ◽  
Femtosecond Pulse

Mode-locked Nd:LGS laser with femtosecond pulse duration

2013 ◽  
Author(s):  
Qing Wang ◽  
Zhiyi Wei ◽  
Jiaxing Liu ◽  
Zhaohua Wang ◽  
Zhiguo Zhang ◽  
...  
Keyword(s):  
Pulse Duration ◽  
Femtosecond Pulse
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