30 September 1996 Stabilize cw laser power by successive approximation method
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The successive approximation method was used to stabilize cw laser power. Silicon photodiode is used to monitor the laser output power, and elector-optical modulator is used to control the power. The feedback loop could work in both linear and non-linear states. Thus the time to reach stabilization is shorten and the stability is improved. We experiment with an external He-Ne laser whose own output power is 8 mW and stability is 3%, and obtained stable output power 5.5 mW with stability 0.002%/hour. This kind of laser power stabilizer can also be used in other visible to near infrared laser.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hejun Yao, Zai-Qing Li, Renyu Zhang, "Stabilize cw laser power by successive approximation method", Proc. SPIE 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers, (30 September 1996); doi: 10.1117/12.253288; https://doi.org/10.1117/12.253288

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