A Low-Cost Submicrolinear Incremental Encoder Based on 3[Formula Omitted]3 Fiber-Optic Directional Coupler

A Low-Cost Submicrolinear Incremental Encoder Based on 3[Formula Omitted]3 Fiber-Optic Directional Coupler

A high-precision displacement sensor has been developed for short-distance measurement with the interferometric method. This sensor uses a 3 3 fiber-optic directional coupler and a high-coherence laser source with 1550-nm wavelength to produce two interference patterns. A Lissajous figure is generat...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 2010-06, Vol.59 (6), p.1624-1633
Hauptverfasser: Chow, H W, Cheung, Norbert C, Jin, W
Format: Artikel
Sprache:eng
Schlagworte:
Directional couplers
Displacement
Displacement measurement
Encoders
Fiber optics
Instrumentation
Optical fibers
Sensors
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creator Chow, H W
Cheung, Norbert C
Jin, W
description A high-precision displacement sensor has been developed for short-distance measurement with the interferometric method. This sensor uses a 3 3 fiber-optic directional coupler and a high-coherence laser source with 1550-nm wavelength to produce two interference patterns. A Lissajous figure is generated based on these two patterns. The change in displacement can be obtained after signal comparing and processing. Low cost and high precision are the main advantages of this sensor. Two signal-processing approaches are presented for displacement measurement.
doi_str_mv 10.1109/TIM.2009.2021622
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source IEEE Electronic Library (IEL)
subjects Directional couplers
Displacement
Displacement measurement
Encoders
Fiber optics
Instrumentation
Optical fibers
Sensors
title A Low-Cost Submicrolinear Incremental Encoder Based on 3[Formula Omitted]3 Fiber-Optic Directional Coupler
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