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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 23 — Nov. 15, 2004
  • pp: 5729–5734

High stability multiplexed fiber interferometer and its application on absolute displacement measurement and on-line surface metrology

Dejiao Lin, Xiangqian Jiang, Fang Xie, Wei Zhang, Lin Zhang, and Ian Bennion  »View Author Affiliations


Optics Express, Vol. 12, Issue 23, pp. 5729-5734 (2004)
http://dx.doi.org/10.1364/OPEX.12.005729


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Abstract

We propose a self-reference multiplexed fiber interferometer (MFI) by using a tunable laser and fiber Bragg grating (FBG). The optical measurement system multiplexes two Michelson fiber interferometers with shared optical path in the main part of optical system. One fiber optic interferometer is used as a reference interferometer to monitor and control the high accuracy of the measurement system under environmental perturbations. The other is used as a measurement interferometer to obtain information from the target. An active phase tracking homodyne (APTH) technique is applied for signal processing to achieve high resolution. MFI can be utilized for high precision absolute displacement measurement with different combination of wavelengths from the tunable laser. By means of Wavelength-Division-Multiplexing (WDM) technique, MFI is also capable of realizing on-line surface measurement, in which traditional stylus scanning is replaced by spatial light-wave scanning so as to greatly improve the measurement speed and robustness.

© 2004 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.6660) Instrumentation, measurement, and metrology : Surface measurements, roughness

ToC Category:
Research Papers

History
Original Manuscript: October 7, 2004
Revised Manuscript: November 5, 2004
Published: November 15, 2004

Citation
Dejiao Lin, Xiangqian Jiang, Fang Xie, Wei Zhang, Lin Zhang, and Ian Bennion, "High stability multiplexed fiber interferometer and its application on absolute displacement measurement and on-line surface metrology," Opt. Express 12, 5729-5734 (2004)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-12-23-5729


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References

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