Abstract

We report here on the development of an optical transducer for mechanical vibration, making use of an ultrashort Fabry–Perot cavity. The noise level measured by a cavity 150 μm long is ~1.3 × 10⁻¹⁶ m/√Hz at ~1 kHz, which was obtained without a frequency-stabilization system. It was, however, large compared with the shot noise.

© 1995 Optical Society of America

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