Optical phase conjugation by degenerate four-wave mixing in photorefractive mesogenic composites

Keiko Kitamura; Hiroshi Ono; Hideki Norisada; Nobuhiro Kawatsuki

doi:10.1117/12.429382

15 June 2001 Optical phase conjugation by degenerate four-wave mixing in photorefractive mesogenic composites

Keiko Kitamura, Hiroshi Ono, Hideki Norisada, Nobuhiro Kawatsuki

Proceedings Volume 4279, Organic Photonic Materials and Devices III; (2001) https://doi.org/10.1117/12.429382
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States

Abstract

The high efficient optical phase conjugation was successfully observed in a photorefractive mesogenic composite. The photorefractive mesogenic composite consists of a functionalized copolymer, low-molar-mass liquid crystal mixture (E7) and 2-4-7-trinitro-9-fruorenone (TNF) as a sensitizing dye. Experiments of optical phase conjugation were carried out under the degenerate four wave mixing (DFWM) configuration using a frequency-doubled Nd-YAG laser of 532 nm (on-resonant) or a He-Ne laser of 633 nm (off-resonant). The refractive index modulation was estimated to be around 2.5 X 10^-3 from the phase conjugate reflectance on the basis of the coupled wave theory including the absorption loss of the photorefractive media.

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Keiko Kitamura, Hiroshi Ono, Hideki Norisada, and Nobuhiro Kawatsuki "Optical phase conjugation by degenerate four-wave mixing in photorefractive mesogenic composites", Proc. SPIE 4279, Organic Photonic Materials and Devices III, (15 June 2001); https://doi.org/10.1117/12.429382

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KEYWORDS

Phase conjugation

Composites

Liquid crystals

Reflectivity

Polymers

Four wave mixing

Nd:YAG lasers

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