Open AccessBeam intensity reshaping by pump modification in a laser amplifier
Author(s) -
Igor A. Litvin,
Oliver J. P. Collet,
Gary King,
H. J. Strauss
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.030165
Subject(s) - optics , laser beam quality , materials science , m squared , beam (structure) , amplifier , laser , beam parameter product , intensity (physics) , beam diameter , laser power scaling , optoelectronics , laser beams , physics , cmos
We propose a new technique for laser beam shaping into a desirable beam profile by using a laser amplifier with a pump beam that has a modified intensity profile. We developed the analytical formula, which describes the transformation of the seed beam into the desired beam profile in a four level amplifiers small signal regime. We propose a numerically method to obtain the required pump intensity profile in the case where high pump power saturated the laser crystal or for three level materials. The theory was experimentally verified by one dimensionally shaping a Gaussian shaped seed into a Flat-Top beam in a Ho:YLF amplifier pumped by a Tm:YLF laser with a HG(01) intensity profile.