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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 33 — Nov. 20, 2006
  • pp: 8500–8505

High-frequency intensity modulation in orthogonal polarized dual frequency lasers with optical feedback

Wei Mao, Shulian Zhang, and Ligang Fei  »View Author Affiliations

Applied Optics, Vol. 45, Issue 33, pp. 8500-8505 (2006)

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High-frequency modulation of laser output intensity is studied with asymmetric feedback induced by the misalignment of an external feedback reflector in an orthogonal polarized dual frequency laser. The fringe frequency of the optical feedback system is seven times higher than that of a conventional optical feedback system, due to multiple feedback effects. The output characteristics of two orthogonal polarized modes are also investigated. Mode competition is observed between the two modes. When initial intensities of the two modes are unequal, the mode competition will be strong. The difference in initial intensity between the two orthogonally polarized modes plays an important role in the mode competition with optical feedback. Experimental results are presented, as well as a theoretical explanation. The high-frequency modulation of laser intensity can greatly increase the resolution of an optical feedback sensing system.

© 2006 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.1340) Lasers and laser optics : Atomic gas lasers
(260.3160) Physical optics : Interference

Original Manuscript: March 29, 2006
Manuscript Accepted: June 28, 2006

Wei Mao, Shulian Zhang, and Ligang Fei, "High-frequency intensity modulation in orthogonal polarized dual frequency lasers with optical feedback," Appl. Opt. 45, 8500-8505 (2006)

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