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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 8 — Apr. 18, 2005
  • pp: 3117–3122

Polarization control in a He-Ne laser using birefringence feedback

Ligang Fei, Shulian Zhang, Yan Li, and Jun Zhu  »View Author Affiliations

Optics Express, Vol. 13, Issue 8, pp. 3117-3122 (2005)

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The polarization dynamics of laser subjected to weak optical feedback from birefringence external cavity are studied theoretically and experimentally. It is found that polarization flipping with hysteresis is induced by birefringence feedback, and the intensities of two eigenstates are both modulated by external cavity length. The variations of hysteresis loop and duty ratios of two eigenstates in one period of intensity modulation with phase differences of birefringence element in external cavity are observed. When the phase difference is π/2, the two eigenstates will equally alternatively oscillate, and the width of hysteresis loop is the smallest.

© 2005 Optical Society of America

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

ToC Category:
Research Papers

Original Manuscript: March 15, 2005
Revised Manuscript: April 5, 2005
Published: April 18, 2005

Ligang Fei, Shulian Zhang, Yan Li, and Jun Zhu, "Polarization control in a He-Ne laser using birefringence feedback," Opt. Express 13, 3117-3122 (2005)

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