Results 11 to 20 of about 1,033,909 (189)

Few-cycle fiber pulse compression and evolution of negative resonant radiation [PDF]

open access: yesNew Journal of Physics, 2014
We present experimental observations of the spectral expansion of fs-pulses compressing in optical fibers. Using the input pulse frequency chirp we are able to scan through the pulse compression spectra and observe in detail the emergence of negative ...
J McLenaghan, F König
doaj   +2 more sources

Microwave pulse compression using a helically corrugated waveguide [PDF]

open access: yes, 2005
There has been a drive in recent years to produce ultrahigh power short microwave pulses for a range of applications. These high-power pulses can be produced by microwave pulse compression.
Denisov, G.G.   +27 more
core   +4 more sources

Generation, amplification, and nonlinear self-compression of powerful superradiance pulses [PDF]

open access: yes, 2012
Superradiance (SR) of electron bunches can be considered an effective method of production of ultrashort electromagnetic pulses. Different types of SR associated with different mechanisms (cyclotron, Cherenkov, and bremsstrahlung) of stimulated emission ...
Phelps, A.D.R.   +23 more
core   +4 more sources

Chirped pulse Raman amplification in plasma [PDF]

open access: yes, 2011
Raman amplification in plasma has been proposed to be a promising method of amplifying short radiation pulses. Here, we investigate chirped pulse Raman amplification (CPRA) where the pump pulse is chirped and leads to spatiotemporal distributed gain ...
Vieux, Gregory   +10 more
core   +4 more sources

Designing dispersion- and mode-area-decreasing holey fibers for soliton compression [PDF]

open access: yes, 2007
We investigate numerically the adiabatic compression of solitons at 1.55 µm in holey fibers which exhibit simultaneously decreasing dispersion and effective mode area.
Tse, M.L.V.   +3 more
core   +2 more sources

Wavelength and duration tunable 10 GHz 1.3ps pulse source using dispersion decreasing fiber based distributed Raman amplification [PDF]

open access: yes, 2004
We experimentally demonstrate a novel pulse compression scheme using dispersion decreasing fiber (DDF) based distributed Raman amplification. We adiabatically compress 10GHz, 13ps seed pulses generated using a commercially available electro-absorption ...
Richardson, D.J., Kogure, T., Lee, J.H.
core   +1 more source

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 ...
Barry, Liam P.   +3 more
core   +2 more sources

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

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

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