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3 January 1996 Optic fiber interferometric system for absolute distance measurement
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An optic fiber interferometric system for measuring absolute distance up to 1 meter is presented. Two interferometers are employed in this system. A fiber Mach-Zehnder structured interferometer using a laser diode as source is set up to position the target and tuning the optic paths. Another fiber Mach-Zehnder structured interferometer with He-Ne laser source is used to measure the displacement. To expend the dynamic range of the system, the method of multiplexing the optic path by introducing accurately calibrated optic fibers into the system is illustrated. In addition, the signal processing methods used in the system are also discussed in the paper.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shenghua Ye, Hai Xiao, Haitao Hong, and Chunhe Wang "Optic fiber interferometric system for absolute distance measurement", Proc. SPIE 2594, Self-Calibrated Intelligent Optical Sensors and Systems, (3 January 1996);

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