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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 4223–4230

Fiber-optic interferometer for surface profile measurement with vibration suppression

Taekmin Kwon and Seung-Woo Kim  »View Author Affiliations


Optics Express, Vol. 19, Issue 5, pp. 4223-4230 (2011)
http://dx.doi.org/10.1364/OE.19.004223


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Abstract

We describe an improved design of fiber-optic interferometer intended to measure surface profiles with enhanced capability of vibration suppression. The reference wavefront is generated directly from the measurement wave using a multi-mode fiber that eliminates only the spatial wavefront distortion by means of bend loss. The temporal fluctuation caused by vibration is consequently cancelled out in the process of interference since it becomes to exist in both the measurement and reference waves. Further, an injection locking technique is incorporated to stabilize the reference wave intensity and hence make stable the interferometric fringe intensity. Experimental result proves that the proposed fiber-optic interferometer is capable of producing sub-wavelength measurement precision even in the presence of severe vibration with 100-μm amplitude.

© 2011 OSA

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(140.3520) Lasers and laser optics : Lasers, injection-locked

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: December 21, 2010
Revised Manuscript: February 16, 2011
Manuscript Accepted: February 16, 2011
Published: February 17, 2011

Citation
Taekmin Kwon and Seung-Woo Kim, "Fiber-optic interferometer for surface profile measurement with vibration suppression," Opt. Express 19, 4223-4230 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-5-4223


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