Articles

Real-time vibration measurement using a feedback type of laser diode interferometer with an optical fiber

[+] Author Affiliations
Takamasa Suzuki, Takao Okada, Osami Sasaki, Takeo Maruyama

Niigata University, Faculty of Engineering, 8050 Ikarashi 2, Niigata 950-21, Japan

Opt. Eng. 36(9), 2496-2502 (Sep 01, 1997). doi:10.1117/1.601475
History: Received Dec. 10, 1996; Revised Apr. 1, 1997; Accepted Apr. 1, 1997
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Abstract

A laser diode interferometer that uses an optical fiber is proposed. The laser diode simultaneously functions as a light source, a phase modulator, and a phase compensator. Detection of the vibration and reduction of external disturbance are carried out using a feedback control for the injection current of the laser diode. Thus it can measure vibration accurately in real time with a simple signal processing circuit. The optical fiber not only functions as a flexible probe, enabling us to measure the vibration of an object that cannot be moved onto the optical bench, it also acts as a reference mirror, thereby simplifying the unit construction. The principle of the feedback control in laser diode interferometer is also described in detail. © 1997 Society of Photo-Optical Instrumentation Engineers.

© 1997 Society of Photo-Optical Instrumentation Engineers

Citation

Takamasa Suzuki ; Takao Okada ; Osami Sasaki and Takeo Maruyama
"Real-time vibration measurement using a feedback type of laser diode interferometer with an optical fiber", Opt. Eng. 36(9), 2496-2502 (Sep 01, 1997). ; http://dx.doi.org/10.1117/1.601475


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