Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20186
Title: A low-cost submicrolinear incremental encoder based on 3 x 3 fiber-optic directional coupler
Authors: Chow, HW
Cheung, NC 
Jin, W 
Keywords: Coupler
Displacement measurement
Laser measurement applications
Optical fiber interference
Optical interferometry
Issue Date: 2010
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on instrumentation and measurement, 2010, v. 59, no. 6, p. 1624-1633 How to cite?
Journal: IEEE transactions on instrumentation and measurement 
Abstract: A high-precision displacement sensor has been developed for short-distance measurement with the interferometric method. This sensor uses a 3 x 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.
URI: http://hdl.handle.net/10397/20186
ISSN: 0018-9456
EISSN: 1557-9662
DOI: 10.1109/TIM.2009.2021622
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