The stabilization of a multiplexed optical fiber interferometer system for on-line displacement precision measurement with a simple electric feedback loop is presented. Based on the characteristics of fiber Bragg gratings, a multiplexed optical fiber interferometer system includes two independent optical fiber Michelson interferometers, of which the optical path is almost overlapped. One interferometer is used for stabilization while other interferometer is used for measurement. A feed back signal from the feedback loop drives tube PZT, on which one arm of the fiber interferometer is wounded. The phase-shift in two arms of the interferometer resulting from the temperature fluctuations and other types of environmental disturbances is compensated. The bandwidth of the feedback loop is 5kHz. This makes the multiplexed fiber interferometer system stable enough for on-line precision measurement.

Date Published: 20 May 2009
PDF: 5 pages
Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72830D (20 May 2009); doi: 10.1117/12.828595

Published in SPIE Proceedings Vol. 7283:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; James C. Wyant; Robert A. Smythe; Hexin Wang, Editor(s)