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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 5 — Mar. 1, 2010
  • pp: 5021–5027

Circularly polarized high-efficiency cholesteric liquid crystal lasers with a tunablenematic phase retarder

Hamidreza Shirvani-Mahdavi, Ezeddin Mohajerani, and Shin-Tson Wu  »View Author Affiliations

Optics Express, Vol. 18, Issue 5, pp. 5021-5027 (2010)

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A high efficiency dye-doped cholesteric liquid crystal (CLC) is demonstrated by optimizing the dye concentration and using an electrically tunable nematic liquid crystal (NLC) phase retarder. The state of polarization of laser emission in CLC lasers, contrary to our expectations, due to the refractive index mismatch at the boundaries is not exactly circular. A double-cell structure including a CLC laser and an adjustable NLC phase retarder with a mirror reflector on one of the inner surfaces not only purifies the polarization state of the laser output but also improves the laser efficiency by 6.7X, over the single-direction dye-doped CLC laser.

© 2010 OSA

OCIS Codes
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

Original Manuscript: January 14, 2010
Revised Manuscript: February 19, 2010
Manuscript Accepted: February 22, 2010
Published: February 25, 2010

Hamidreza Shirvani-Mahdavi, Ezeddin Mohajerani, and Shin-Tson Wu, "Circularly polarized high-efficiency cholesteric liquid crystal lasers with a tunable nematic phase retarder," Opt. Express 18, 5021-5027 (2010)

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