Multiple filamentation induced by input-beam ellipticity
نویسندگان
چکیده
منابع مشابه
Multiple filamentation induced by input-beam ellipticity.
We provide what is to our knowledge the first experimental evidence that multiple filamentation (MF) of ultra-short pulses can be induced by input beam ellipticity. Unlike noise-induced MF, which results in complete beam breakup, the MF pattern induced by small input beam ellipticity appears as a result of nucleation of annular rings surrounding the central filament. Moreover, our experiments s...
متن کاملStatistical analysis of noise-induced multiple filamentation.
The propagation of high-power large-aperture laser beams in a Kerr medium is considered. A statistical approach is developed for the growth of filaments from small-amplitude small-scale initial modulations. Closed-form expressions are derived for the intensity distribution, contrast, and maximal beam intensity, which are valid up to the blowup of the most intense filament. Numerical experiments...
متن کاملBeam Distribution Function after Filamentation
In this paper, we calculate the beam distribution function after filamentation (phase-mixing) of a focusing mismatch. This distribution is relevant when interpreting beam measurements and sources of emittance dilution in linear colliders. It is also important when considering methods of diluting the phase space density, which may be required for the machine protection system in future linear co...
متن کاملVacuum-field-induced filamentation in laser-beam propagation
As a laser beam passes through a material medium, it is often observed to break up into a large number of filaments @1#. This filamentation process is initiated by the presence of weak perturbations on the laser wave front @2,3#, which can grow by means of four-wave-mixing processes @4# and become large enough to disturb the overall propagation of the beam. Laser-beam filamentation can be suppr...
متن کاملEffect of beam ellipticity on self-mode locking in lasers.
Self-mode-locking is a common way of generating very short laser pulses.12 It occurs when a beam self-focuses and narrows as it passes through a nonlinear intracavity material, thus expanding or contracting at other locations of the laser cavity.3 Since self-focusing is an intensity-dependent process, at any point in the cavity an intense (mode-locked) laser beam has a different size from a wea...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Optics Letters
سال: 2004
ISSN: 0146-9592,1539-4794
DOI: 10.1364/ol.29.001126