Coherent beam amplification with a photorefractive liquid crystal

I. C. Khoo, B. D. Guenther, M. V. Wood, P. Chen, Min Yi Shih

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Abstract

Coherent amplification of a signal beam by a strong pump beam is observed in thin films of fullerene-doped nematic liquid crystal. Exponential gain constants as high as 2890 cm-1 with no phase cross talk are achieved at low applied dc bias voltage and pump beam intensity. The underlying mechanism is the electro-optically induced spatially reorientation of the liquid-crystal axis and the resultant phase-shifted index grating required for two-beam coupling.

Original languageEnglish (US)
Pages (from-to)1229-1231
Number of pages3
JournalOptics Letters
Volume22
Issue number16
DOIs
StatePublished - Aug 15 1997

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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    Khoo, I. C., Guenther, B. D., Wood, M. V., Chen, P., & Shih, M. Y. (1997). Coherent beam amplification with a photorefractive liquid crystal. Optics Letters, 22(16), 1229-1231. https://doi.org/10.1364/OL.22.001229