Performance study of a high power single-frequencyfiber amplifier architecture for gravitational wavedetectors
2020
The next generation of interferometric gravitational wave detectors
will use low-noise single-frequency laser sources at 1064 nm. Fiber
amplifiers are a promising design option because of high efficiency,
compact design, and superior optical beam properties compared to the
current generation of laser sources for gravitational wave detectors. We
developed a reliable 200 W single-frequency fiber amplifier architecture
to meet the application requirements regarding relative power noise,
relative pointing noise, frequency noise, linear polarization, and beam
quality. We characterized several of these amplifiers and discuss
performance variations resulting from manufacturing tolerances and
variations in amplifier architecture. This study serves as a baseline for
further power scaling via e.g., coherent beam combining
experiments.
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