Abstract
An active stabilization system for a bulk optics Mach–Zhender interferometer has been assembled, with which it is possible to reduce low-frequency thermally and seismically induced optomechanical component drift. Reductions from greater than 10 dB/min variation in interferometer photodetector output signal (referenced to 1.0 μV) to less than 1 dB/min have been achieved. The active stabilization feedback loop effectively ‘‘locks the interferometer in’’ near its maximum point of sensitivity. The resulting highly stable output signal allows the interferometer to be used for applications such as micromechanical displacement measurement.
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