1 September 1997 Real-time vibration measurement using a feedback type of laser diode interferometer with an optical fiber
Author Affiliations +
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.
Takamasa Suzuki, Takao Okada, Osami Sasaki, Takeo Maruyama, "Real-time vibration measurement using a feedback type of laser diode interferometer with an optical fiber," Optical Engineering 36(9), (1 September 1997). https://doi.org/10.1117/1.601475
JOURNAL ARTICLE
7 PAGES


SHARE
Back to Top