High-precision phase shift of optic fiber sensor applied to laser dynamic-fixed distance measurement

Yongjun Qi; Zeying Chi

doi:10.1117/12.385529

9 May 2000 High-precision phase shift of optic fiber sensor applied to laser dynamic-fixed distance measurement

Yongjun Qi, Zeying Chi

Proceedings Volume 4077, International Conference on Sensors and Control Techniques (ICSC 2000); (2000) https://doi.org/10.1117/12.385529
Event: International Conference on Sensors and Control Techniques (ICSC2000), 2000, Wuhan, China

Abstract

A method about optic fiber sensor technology applied to laser dynamic-fixed distance ranging system was introduced in this paper. The laser diode was modulated by continual sine signal in the system. According to the instinctive characteristic of optic fiber that the fiber can produce high precision phase shift, the system measured the predetermined ranging distance by means of measuring the phase difference between the measuring light signal and the reference light signal caused by their different light courses. Based on the phase demodulation theory, the function of optic fiber sensor in the system was described in this paper, an important reformation of the phase demodulation system was introduced, and the evaluation of the application and development prospect of the research was given as well.

Citation Download Citation

Yongjun Qi and Zeying Chi "High-precision phase shift of optic fiber sensor applied to laser dynamic-fixed distance measurement", Proc. SPIE 4077, International Conference on Sensors and Control Techniques (ICSC 2000), (9 May 2000); https://doi.org/10.1117/12.385529

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