Buikema Aaron, Jose Franklin, Augst Steven J, Fritschel Peter, Mavalvala Nergis
Opt Lett. 2019 Aug 1;44(15):3833-3836. doi: 10.1364/OL.44.003833.
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.
我们报告了一种窄线宽掺镱光纤放大器的设计及其噪声性能，该放大器在1064nm波长处输出功率高达178W，可用于引力波（GW）干涉探测器。这种新颖的设计采用了一种特殊的大模面积增益光纤，其纤芯掺杂受限且包层凹陷，随后接一根纤芯较小的无源光纤以改善输出光束质量。我们表明，该系统的自由运转噪声等于或优于当前先进LIGO的噪声要求。最后，我们讨论了在引力波探测器中长期使用的潜在改进措施。
