1 December 2005 Reflectometric fiber optic frequency-modulated continuous-wave interferometric displacement sensor
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Abstract
A practical reflectometric fiber optic displacement sensor is reported. The sensor is based on the principle of optical frequency-modulated continuous-wave (FMCW) interference and primarily consists of a single-mode laser diode, a Y-type fiber optic directional coupler, and a quarter-pitch gradient-index lens. The displacement of the target is determined by measuring the phase shift of the beat signal with a special signal-processing method. An accuracy of 0.02 µm in a measurement range of 1000 µm has been achieved.
© (2005) Society of Photo-Optical Instrumentation Engineers (SPIE)
Jesse Zheng, Jesse Zheng, } "Reflectometric fiber optic frequency-modulated continuous-wave interferometric displacement sensor," Optical Engineering 44(12), 124404 (1 December 2005). https://doi.org/10.1117/1.2148939 . Submission:
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