We present results on the power stabilization of a Nd:YAG laser in the frequency band from 1 Hz to 100 kHz. High-power, low-noise photodetectors are used in a dc-coupled control loop to achieve relative power fluctuations down to 5 X 10(-9)Hz(-1/2) at 10 Hz and 3.5 X 10(-9) Hz-(1/2) up to several kHz, which is very close to the shot-noise limit for 80 mA of detected photocurrent on each detector. We investigated and eliminated several noise sources such as ground loops and beam pointing. The achieved stability level is close to the requirements for the Advanced LIGO gravitational wave detector. (c) 2006 Optical Society of America.
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机译：我们介绍了Nd：YAG激光器在1 Hz至100 kHz频带内的功率稳定度的结果。在直流耦合控制环路中使用大功率，低噪声光电探测器，以实现在10 Hz和3.5 X 10（-9）Hz时低至5 X 10（-9）Hz（-1/2）的相对功率波动-（1/2）高达几个kHz，非常接近每个探测器上检测到的80 mA光电流的散粒噪声极限。我们调查并消除了一些噪声源，例如接地回路和波束指向。达到的稳定性水平接近高级LIGO重力波探测器的要求。 （c）2006年美国眼镜学会。
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