Pulsed laser diode optical fiber interferometer for absolute distance measurement

Chunhe Wang; Hai Xiao; Haitao Hong; Shenghua Ye

doi:10.1117/12.255370

25 October 1996 Pulsed laser diode optical fiber interferometer for absolute distance measurement

Chunhe Wang, Hai Xiao, Haitao Hong, Shenghua Ye

Proceedings Volume 2839, Fiber Optic and Laser Sensors XIV; (1996) https://doi.org/10.1117/12.255370
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

An interferometry system for absolute distance measurement is described. In the system, an optical fiber Mach-Zehnder interferometer with a chirped laser diode is employed to position the measured object. Another interferometer with He-Ne laser is used to measure the optical path difference. The coherence-length of the pulsed multimode laser diode is studied. In the experiments, the system measured the absolute distance up to 1 meter with the accuracy of 2 micrometer.

Citation Download Citation

Chunhe Wang, Hai Xiao, Haitao Hong, and Shenghua Ye "Pulsed laser diode optical fiber interferometer for absolute distance measurement", Proc. SPIE 2839, Fiber Optic and Laser Sensors XIV, (25 October 1996); https://doi.org/10.1117/12.255370

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