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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 14 — May. 10, 2009
  • pp: 2707–2710

Nematic liquid crystal optical amplifier consisting of layered structures

Yanbo Pei, Fengfeng Yao, Jianlong Zhang, Chunfeng Hou, and Xiudong Sun  »View Author Affiliations

Applied Optics, Vol. 48, Issue 14, pp. 2707-2710 (2009)

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Coherent amplification was observed in an optical structure with multilayer C 60 doped nematic films, in which photorefractive gratings working in the Raman–Nath regime were created, leading to an asymmetric energy transfer in two-beam coupling. This multilayer optical structure exhibited exponential dependence of the signal gain on the number of nematic layers when higher-order diffractions were negligibly small. A gain of the 0.1 μW signal as high as 4000 was achieved in the six-layer sample at a low dc voltage of 1.2 V and a low pump beam power of 8 mW . The gain of this ultrahigh sensitive six-layer sample depended strongly on the pump to signal beam power ratio as well as the power of the signal.

© 2009 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.5330) Nonlinear optics : Photorefractive optics

ToC Category:
Optical Devices

Original Manuscript: February 18, 2009
Revised Manuscript: April 4, 2009
Manuscript Accepted: April 21, 2009
Published: May 6, 2009

Yanbo Pei, Fengfeng Yao, Jianlong Zhang, Chunfeng Hou, and Xiudong Sun, "Nematic liquid crystal optical amplifier consisting of layered structures," Appl. Opt. 48, 2707-2710 (2009)

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