Open AccessBeam cleaning effects in multimode GRIN-fiber Raman lasers and amplifiers
Author(s) -
А. П. Кузнецов,
Ilya N. Nemov,
Alexey A. Wolf,
S. I. Kablukov,
Sergey A. Babin,
Yizhu Chen,
Tianfu Yao,
Jinyong Leng,
Pu Zhang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1508/1/012009
Subject(s) - optics , materials science , multi mode optical fiber , laser beam quality , optical fiber , optoelectronics , laser , raman spectroscopy , amplifier , beam (structure) , laser beams , physics , cmos
Raman conversion in multimode GRIN fibers is accompanied by sufficient improvement of the output beam quality in comparison with that for pump radiation, which offers opportunities to create amplifiers and lasers of new type based on directly 9xx-nm diode pumped passive GRIN fibers, which may operate at almost any wavelength in transmission window (0.95-2 micron) of silica fibers. Here we review experimental results and physical mechanisms leading to the beam quality improvement (beam cleaning) in multimode Raman lasers and amplifiers, including effects of Raman gain, fiber Bragg gratings and Rayleigh backscattering feedback in GRIN fibers.