Feedback type of laser diode interferometer with an optical fiber

Takamasa Suzuki; Takao Okada; Osami Sasaki; Takeo Maruyama

doi:10.1117/12.276309

17 July 1996 Feedback type of laser diode interferometer with an optical fiber

Takamasa Suzuki, Takao Okada, Osami Sasaki, Takeo Maruyama

Proceedings Volume 2860, Laser Interferometry VIII: Techniques and Analysis; (1996) https://doi.org/10.1117/12.276309
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

A laser diode interferometer which uses an optical fiber is proposed. The laser diode simultaneously functions as a light source, a phase modulator, and a phase compensator. The detection of the vibration and the reduction of external disturbance are carried out, by using a feedback control for the injection current of the laser diode. So it can measure the 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 the object that cannot be moved onto the vibration absorption board, it also acts as a reference mirror, thereby simplifying the unit construction.

Citation Download Citation

Takamasa Suzuki, Takao Okada, Osami Sasaki, and Takeo Maruyama "Feedback type of laser diode interferometer with an optical fiber", Proc. SPIE 2860, Laser Interferometry VIII: Techniques and Analysis, (17 July 1996); https://doi.org/10.1117/12.276309

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