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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8044–8050

Angle measurement with laser feedback instrument

Wenxue Chen, Shulian Zhang, and Xingwu Long  »View Author Affiliations

Optics Express, Vol. 21, Issue 7, pp. 8044-8050 (2013)

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An instrument for angle measurement based on laser feedback has been designed. The measurement technique is based on the principle that when a wave plate placed into a feedback cavity rotates, its phase retardation varies. Phase retardation is a function of the rotating angle of the wave plate. Hence, the angle can be converted to phase retardation. The phase retardation is measured at certain characteristic points identified in the laser outputting curve that are then modulated by laser feedback. The angle of a rotating object can be measured if it is connected to the wave plate. The main advantages of this instrument are: high resolution, compact, flexible, low cost, effective power, and fast response.

© 2013 OSA

OCIS Codes
(140.1340) Lasers and laser optics : Atomic gas lasers
(260.1440) Physical optics : Birefringence
(260.3160) Physical optics : Interference

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: January 22, 2013
Revised Manuscript: March 17, 2013
Manuscript Accepted: March 18, 2013
Published: March 26, 2013

Wenxue Chen, Shulian Zhang, and Xingwu Long, "Angle measurement with laser feedback instrument," Opt. Express 21, 8044-8050 (2013)

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