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Proceedings Paper

Measuring of object vibration using sinusoidal-modulation laser-diode active interferometer
Author(s): Yong Ai; Qinfeng Cao; Su Lu
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Paper Abstract

Using the character that the emitting optical frequency of the laser diode is controlled by the injected current, the ability of eliminating environmental disturbance of the sinusoidal modulation laser diode active interferometer will be raised by more than one hundred times through putting the disturbed interference signal produced by the environment into the interferometer. When vibrating frequency of objects is different from that of the sinusoidol modulation, 'beat- frequency' will be produced in the interfere signal, which can be analyzed to get the vibrating frequency of objects. This paper described the operation principle and theoretical delusion of the 'beat-frequency' method.

Paper Details

Date Published: 24 September 1996
PDF: 4 pages
Proc. SPIE 2886, Semiconductor Lasers II, (24 September 1996); doi: 10.1117/12.251914
Show Author Affiliations
Yong Ai, Wuhan Univ. (China)
Qinfeng Cao, Wuhan Univ. (China)
Su Lu, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 2886:
Semiconductor Lasers II
Siamak Forouhar; Qiming Wang, Editor(s)

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