Open AccessNarrow-linewidth fiber amplifier for gravitational-wave detectors
Author(s) -
A. Buikema,
Franklin José,
Steven J. Augst,
P. Fritschel,
N. Mavalvala
Publication year - 2019
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.003833
Subject(s) - optics , laser linewidth , fiber amplifier , detector , physics , gravitational wave , amplifier , optical fiber , fiber laser , materials science , optoelectronics , laser , cmos , astrophysics
We report on the design and noise performance of a narrow-linewidth Yb-doped fiber amplifier emitting up to 178 W at 1064 nm for possible use in gravitational-wave (GW) interferometric detectors. The novel design utilizes a specialty large-mode-area gain fiber with confined-core doping and depressed cladding, followed by a smaller-core passive fiber to improve output beam quality. We show that the free-running noise of the system is equal to or better than current Advanced LIGO noise requirements. Finally, we discuss potential improvements for long-term use in GW detectors.