Measuring of object vibration using sinusoidal-modulation laser-diode active interferometer

Yong Ai; Qinfeng Cao; Su Lu

doi:10.1117/12.251914

24 September 1996 Measuring of object vibration using sinusoidal-modulation laser-diode active interferometer

Yong Ai, Qinfeng Cao, Su Lu

Proceedings Volume 2886, Semiconductor Lasers II; (1996) https://doi.org/10.1117/12.251914
Event: Photonics China '96, 1996, Beijing, China

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.

Citation Download Citation

Yong Ai, Qinfeng Cao, and Su Lu "Measuring of object vibration using sinusoidal-modulation laser-diode active interferometer", Proc. SPIE 2886, Semiconductor Lasers II, (24 September 1996); https://doi.org/10.1117/12.251914

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