High-sensitivity adaptive vibration measurements with nonsteady-state photo-EMF-based photodetectors

Nikolai A. Korneev; Ponciano Rodriguez-Montero; B. Sanchez; Serguei I. Stepanov; Igor A. Sokolov

doi:10.1117/12.188873

4 October 1994 High-sensitivity adaptive vibration measurements with nonsteady-state photo-EMF-based photodetectors

Nikolai A. Korneev, Ponciano Rodriguez-Montero, B. Sanchez, Serguei I. Stepanov, Igor A. Sokolov

Proceedings Volume 2264, Vibration Monitoring and Control; (1994) https://doi.org/10.1117/12.188873
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

We present results of detailed experimental study of threshold sensitivity of GaAs adaptive photodetector at 632.8 nm. The minimal experimentally detected sinusoidal phase modulation was approximately equals 1.6 X 10^-6 rad(root)mW/Hz that approached the theoretical limit for these devices (approximately equals 2 X 10^-7 rad(root)mW/Hz) and allowed detection of approximately equals 1.6 X 10^-7 micrometers vibration amplitudes with 1 mW laser power in 1 Hz bandwidth.

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Nikolai A. Korneev, Ponciano Rodriguez-Montero, B. Sanchez, Serguei I. Stepanov, and Igor A. Sokolov "High-sensitivity adaptive vibration measurements with nonsteady-state photo-EMF-based photodetectors", Proc. SPIE 2264, Vibration Monitoring and Control, (4 October 1994); https://doi.org/10.1117/12.188873

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