A low-cost submicrolinear incremental encoder based on 3 × 3 fiber-optic directional coupler

H. W. Chow; Chow Norbert Cheung; Wei Jin

doi:10.1109/TIM.2009.2021622

A low-cost submicrolinear incremental encoder based on 3 × 3 fiber-optic directional coupler

H. W. Chow, Chow Norbert Cheung, Wei Jin

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

7 Citations (Scopus)

Abstract

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.

Original language	English
Article number	5443850
Pages (from-to)	1624-1633
Number of pages	10
Journal	IEEE Transactions on Instrumentation and Measurement
Volume	59
Issue number	6
DOIs	https://doi.org/10.1109/TIM.2009.2021622
Publication status	Published - 1 Jun 2010

Keywords

Coupler
Displacement measurement
Laser measurement applications
Optical fiber interference
Optical interferometry

ASJC Scopus subject areas

Electrical and Electronic Engineering
Instrumentation

More information

10.1109/TIM.2009.2021622

Cite this

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abstract = "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.",

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AB - 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.

KW - Coupler

KW - Displacement measurement

KW - Laser measurement applications

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A low-cost submicrolinear incremental encoder based on 3 × 3 fiber-optic directional coupler

Abstract

Keywords

ASJC Scopus subject areas

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