Design of comb-like profiled fiber for efficient pulse compression based on stationary rescaled-pulse propagation

2005 ◽  
Author(s):  
T. Inoue ◽  
H. Tobioka ◽  
K. Igarashi ◽  
S. Namiki
Keyword(s):  
Pulse Compression ◽  
Pulse Propagation ◽  
Profiled Fiber

Modeling of Pulse Propagation Factor Changes in Type II Second Harmonic Generation

2001 ◽  
Vol 6 (2) ◽  
pp. 51-69 ◽  
Author(s):  
A. Kurtinaitis ◽  
A. Dementjev ◽  
F. Ivanauskas
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Pulse Compression ◽  
Pulse Propagation ◽  
Second Harmonic ◽  
Spline Approximation ◽  
Laser Pulses ◽  
Ultrashort Laser Pulses ◽  
Step Method ◽  
High Degree

We describe the simulations of the second harmonic generation of ultrashort laser pulses by numerically solving a system of wave propagation equations. The equations are solved by using a split-step method in twodimensional cyllindrically symmetric space and time coordinates. The diffraction part of a solution uses the Hopscotch type finite-difference scheme on a regular grid. The transport part is solved by using the cubic spline approximation. The obtained numerical results satisfactorily respect energy conservation constraints. The algorithm and program developed make it possible to optimize the process of the second harmonics generation and to identify the conditions where sufficiently high degree of the pulse compression with a relatively low degradation of their quality is achieved.

OPTIMUM DISPERSION PROFILE AND PEDESTAL-FREE SOLITON PULSE COMPRESSION IN DISPERSION-DECREASING FIBER

2003 ◽  
Vol 12 (03) ◽  
pp. 291-305 ◽  
Author(s):  
M. N. VINOJ ◽  
A. U. SEEMA ◽  
V. C. KURIAKOSE
Keyword(s):  
Pulse Compression ◽  
Adiabatic Approximation ◽  
Pulse Propagation ◽  
Integrable Case ◽  
Dispersion Profile ◽  
Gaussian Profile ◽  
Soliton Pulse ◽  
Compression Mechanism ◽  
Optimum Dispersion

We propose soliton pulse compression mechanism in a dispersion decreasing fiber for the integrable case. We have studied the pulse propagation through various dispersion-decreasing profiles in the adiabatic approximation limit. Out of the different profiles studied, Gaussian profile is found to be the best choice for achieving maximum pulse compression and is found that compressed pulse is completely free from pedestals.

Nonlinear phase shifts in the design of comb-like dispersion-profiled fiber for pulse compression

2003 ◽  
Vol 39 (5) ◽  
pp. 401-404 ◽  
Author(s):  
Jianping Wang ◽  
Yue Wu ◽  
Caiyun Lou ◽  
Yizhi Gao
Keyword(s):  
Pulse Compression ◽  
Phase Shifts ◽  
Nonlinear Phase ◽  
Profiled Fiber

Possibility of pulse compression of a short-pulse laser in a plasma

1998 ◽  
Vol 59 (1) ◽  
pp. 91-96 ◽  
Author(s):  
S. SHIBU ◽  
JETENDRA PARASHAR ◽  
H. D. PANDEY
Keyword(s):  
Pulse Compression ◽  
Pulse Propagation ◽  
Short Pulse ◽  
Nonlinear Refraction ◽  
Mass Effect ◽  
Electron Velocity ◽  
Intense Laser ◽  
Short Pulse Laser ◽  
Relativistic Mass ◽  
Self Focusing

On account of nonlinear refraction, arising through the relativistic mass effect, a short intense laser pulse tends to accumulate its energy around the intensity maximum, leading to pulse compression over a length Zc≈ τ0c2ω2/ ω2pv, where τ0 and ω are the pulse duration and frequency of the laser, v is the oscillatory electron velocity and ωp is the plasma frequency. When the transverse extent of the laser is finite, nonlinear self-focusing interferes strongly with this process. The self-focusing occurs in a periodic manner on a shorter scale length. However, over long lengths of pulse propagation, pulse compression could be significant.

Stationary rescaled pulse in dispersion-managed comblike profiled fiber for highly efficient and high-quality optical pulse compression

2007 ◽  
Vol 32 (18) ◽  
pp. 2695 ◽  
Author(s):  
Takashi Inoue ◽  
Yuki Taniguchi ◽  
Jiro Hiroishi ◽  
Takeshi Yagi ◽  
Yu Mimura
Keyword(s):  
Optical Pulse ◽  
Pulse Compression ◽  
High Quality ◽  
Optical Pulse Compression ◽  
Highly Efficient ◽  
Profiled Fiber

scholarly journals Jitter-free 40-fs 375-keV electron pulses directly accelerated by an intense laser beam and their application to direct observation of laser pulse propagation in a vacuum

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Shunsuke Inoue ◽  
Shuji Sakabe ◽  
Yoshihide Nakamiya ◽  
Masaki Hashida
Keyword(s):  
Laser Pulse ◽  
Electric Fields ◽  
Pulse Compression ◽  
Permanent Magnets ◽  
Pulse Propagation ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Intense Laser ◽  
Electron Pulse ◽  
Electron Pulses

AbstractWe report the generation of ultrashort bright electron pulses directly driven by irradiating a solid target with intense femtosecond laser pulses. The duration of electron pulses after compression by a phase rotator composed of permanent magnets was measured as 89 fs via the ponderomotive scattering of electron and laser pulses, which were almost at the compression limit due to the dispersion of the electron optics. The electron pulse compression system consisting of permanent magnets enabled extremely high timing stability between the laser pulse and electron pulse. The long-term RMS arrival time drift was below 14 fs in 4 h, which was limited by the resolution of the current setup. Because there was no time-varying field to generate jitter, the timing jitter was essentially reduced to zero. To demonstrate the capability of the ultrafast electron pulses, we used them to directly visualize laser pulse propagation in a vacuum and perform 2D mapping of the electric fields generated by low-density plasma in real time.

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