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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 24 — Aug. 20, 2007
  • pp: 6064–6068

Self-mixing interference effects of microchip Nd:YAG laser with a wave plate in the external cavity

Yidong Tan and Shulian Zhang  »View Author Affiliations


Applied Optics, Vol. 46, Issue 24, pp. 6064-6068 (2007)
http://dx.doi.org/10.1364/AO.46.006064


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Abstract

We present the optical feedback characteristics of a single-mode Nd:YAG laser with a wave plate in the external cavity. The laser intensities of the two orthogonal directions, which are both modulated by the change of external cavity length, have a phase difference due to the birefringence effect of the wave plate. When threshold intensity is introduced, a period of intensity fringe can be divided into four equal zones. Each zone corresponds to λ / 8 displacement of the external feedback reflector. The direction of displacement can be discriminated by the sequence of these four zones. This phenomenon provides a potential displacement sensor with directional discrimination and high resolution of eighth wavelength compared with the traditional optical feedback.

© 2007 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(260.1440) Physical optics : Birefringence
(260.3160) Physical optics : Interference

ToC Category:
Physical Optics

History
Original Manuscript: March 30, 2007
Revised Manuscript: May 13, 2007
Manuscript Accepted: June 6, 2007
Published: August 10, 2007

Citation
Yidong Tan and Shulian Zhang, "Self-mixing interference effects of microchip Nd:YAG laser with a wave plate in the external cavity," Appl. Opt. 46, 6064-6068 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-24-6064

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