4.6 Article

Stable optical phase modulation with micromirrors

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OPTICS EXPRESS
卷 20, 期 3, 页码 3261-3267

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OPTICAL SOC AMER
DOI: 10.1364/OE.20.003261

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  1. ARO, office of the Director of National Intelligence
  2. Intelligence Advanced Research

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We measure the motional fluctuations of a micromechanical mirror using a Michelson interferometer, and demonstrate its interferometric stability. The position stability of the micromirror is dominated by the thermal mechanical noise of the structure. With this level of stability, we utilize the micromirror to realize an optical phase modulator by simply reflecting light off the mirror and modulating its position. The resonant frequency of the modulator can be tuned by applying a voltage between the mirror and an underlying electrode. Full modulation depth of +/-pi is achieved when the mirror resonantly excited with a sinusoidal voltage at an amplitude of 11V. (C) 2012 Optical Society of America

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