Results 11 to 20 of about 201,828 (293)

Optical Pulse Compression [PDF]

open access: yesTopical Meeting on Ultrafast Phenomena, 1974
The utilization of single-mode optical fibers as the nonlinear element in a pulse compression system has overcome several technical difficulties which have prevented the general use of pulse compression as a laboratory technique. The optical fiber based pulse compressor is particularly well matched to c.w. mode-locked lasers.
  +5 more sources

Optimised design of fibre-based pulse compressor for gain-switched DFB laser pulses at 1.5 µm [PDF]

open access: yes, 1999
An optical-fibre based pulse compressor for gain-switched DFB laser pulses has been optimised using a systematic procedure based on the initial complete characterisation of the laser pulses, followed by numerical simulations of the pulse propagation in ...
B.C. Thomsen   +10 more
core   +1 more source

80 W, up to 2 mJ Yb-based laser multi-pass-cell post-compression down to sub-20 fs: Experimental and numerical results [PDF]

open access: yesEPJ Web of Conferences
In the last years, different methods of laser pulse post-compression have proven their efficiency. Nonlinear spectral broadening achieved when coupling an ultrafast pulse in a gas-filled multi-pass-cell (MPC) provides common pulse compression factors of ...
Hergott Jean-François   +12 more
doaj   +1 more source

Simple, stable and efficient nonlinear pulse compression through cascaded filamentation in air

open access: yesHigh Power Laser Science and Engineering, 2023
Nonlinear compression has become an obligatory technique along with the development of ultrafast lasers in generating ultrashort pulses with narrow pulse widths and high peak power.
Tao Pu   +9 more
doaj   +1 more source

Comparative analysis on pulse compression with classical orthogonal polynomials for optimized time-bandwidth product

open access: yesAin Shams Engineering Journal, 2018
The theme of this paper is to analyze and compare the pulse compression with classical orthogonal polynomials (Chebyshev, Laguerre, Legendre and Hermite polynomials) of different orders.
Ankur Thakur, Salman Raju Talluri
doaj   +1 more source

Compression of Few-Microjoule Femtosecond Pulses in a Hollow-Core Revolver Fiber

open access: yesFibers, 2023
Gas-filled hollow-core fibers are a convenient tool for laser pulse compression down to a few-cycle duration. The development of compact, efficient and high quality compression schemes for laser pulses of relatively low μJ-level energies is of particular
Leonid Losev   +5 more
doaj   +1 more source

Sub two-cycle soliton-effect pulse compression at 800 nm in Photonic Crystal Fibers [PDF]

open access: yes, 2006
The possibility of soliton self-compression of ultrashort laser pulses down to the few-cycle regime in photonic crystal fibers is numerically investigated.
Ahmed   +27 more
core   +2 more sources

Dispersion Caused by the Penetration Effect in X-ray Compressors

open access: yesPhotonics, 2023
Chirped X-ray pulse compression is a promising approach for generating ultra-short X-ray free electron laser (XFEL) pulses. The design of X-ray pulse compressors requires the careful control of group delay dispersion (GDD), which plays a critical role in
Chuan Yang   +7 more
doaj   +1 more source

Experimental optimization of compact double-cell stimulated Brillouin scattering pulse compressor

open access: yesFrontiers in Physics, 2023
To optimize the output of SBS sub-nanosecond pulse compression, two kinds of compact double-cell structures are carried out and compared experimentally. The beam parameters of the compact double-cell structure are calculated theoretically, which provides
Hongli Wang   +3 more
doaj   +1 more source

Harmonic chirp imaging method for ultrasound contrast agent [PDF]

open access: yes, 2005
Coded excitation is currently used in medical ultrasound to increase signal-to-noise ratio (SNR) and penetration depth. We propose a chirp excitation method\ud for contrast agents using the second harmonic component of the response.
Associate Member   +5 more
core   +5 more sources

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