Open AccessLow-noise Raman fiber amplifier pumped by semiconductor disk laser
Author(s) -
Alexander Chamorovskiy,
J. Rautiainen,
Antti Rantamäki,
Oleg G. Okhotnikov
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.006414
Subject(s) - optics , disk laser , materials science , optical amplifier , relative intensity noise , amplifier , laser , fiber laser , noise (video) , semiconductor laser theory , optoelectronics , laser power scaling , physics , cmos , artificial intelligence , computer science , image (mathematics)
A 1.3 µm Raman fiber amplifier pumped by 1.22 µm semiconductor disk laser in co-propagation geometry is demonstrated. Measured relative intensity noise of -148 dB/Hz over frequency range up to 3.5 GHz was measured at 900 mW of pump power. 9 dB gain was achieved with co-propagating pumping geometry with less than 2 dB additional noise induced by amplifier to the signal. Nearly shot-noise-limited operation of semiconductor disk laser combined with the diffraction-limited beam allows for efficient core-pumping of the single-mode fiber Raman amplifiers and represents a highly practical approach which takes full advantage of co-propagating pumping.