Signal processing of fiber-displacement sensor with linear-frequency-modulation laser diode

Yang Zhao; Dacheng Li

doi:10.1117/12.156384

22 September 1993 Signal processing of fiber displacement sensor with linear frequency modulation laser diode

Yang Zhao, Dacheng Li

Proceedings Volume 2101, Measurement Technology and Intelligent Instruments; (1993) https://doi.org/10.1117/12.156384
Event: Measurement Technology and Intelligent Instruments, 1993, Wuhan, China

Abstract

A fiber displacement sensor with a Linear Frequency Modulation (LFM) laser diode and its optical electric signal processing method are described in the paper. It operates on the principle of a non-balance optical fiber Michelson interferometer to realize heterodyne detecting. During processing the heterodyne signal, phase locked loops (PLL) are used to extend the resolution. The resolution of the sensor can reach to π/40. In the paper the experiment result is being showed also.

Citation Download Citation

Yang Zhao and Dacheng Li "Signal processing of fiber displacement sensor with linear frequency modulation laser diode", Proc. SPIE 2101, Measurement Technology and Intelligent Instruments, (22 September 1993); https://doi.org/10.1117/12.156384

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