论文信息 - Signal-beam amplification by two-wave mixing in a liquid-crystal light valve.

Signal-beam amplification by two-wave mixing in a liquid-crystal light valve.

A new two-wave-mixing interaction with gain through a Bi(12)SiO(20) liquid-crystal light valve is presented. We show that the diffraction of a pump beam in the direction of a weak signal leads to a net amplification of the signal beam, with no need for a phase shift between the interference pattern and the induced index grating. A two-wave-mixing gain of 10 and a 150-ms response time are obtained with a 8.8-microm -thick liquid-crystal layer, a total intensity of the interacting beams of only 200 muW/cm(2), and an ac external voltage of +/-6 V . Image amplification is also demonstrated.

[1] I. Khoo,et al. Probe beam amplification via two- and four-wave mixings in a nematic liquid crystal film , 1987 .

[2] Andrzej Miniewicz,et al. Mechanism of optical recording in doped liquid crystals , 1996 .

[3] A. V. Sukhov,et al. Optically induced spatial charge separation in a nematic and the resultant orientational nonlinearity , 1994 .

[4] Nelson V. Tabiryan,et al. Optical phase conjugation by microwatt power of reference waves via liquid crystal light valve , 1981 .

[5] J. Huignard,et al. Liquid crystal light valve using bulk monocrystalline Bi22SiO20as the photoconductive material , 1982, IEEE Journal of Quantum Electronics.

[6] Diffraction of Coupled Waves and Determination of Phase Mismatch Between Holographic Grating and Fringe Pattern , 1979 .

[7] J. Huignard,et al. Phase conjugation with gain at CO2 laser line μl = 10.6 μm from thermally induced gratings in nematic liquid crystals , 1986 .

[8] E. Marom,et al. Phase conjugation of low-power optical beans using liquid-crystal light valves. , 1987, Optics letters.

[9] J. J. Amodei,et al. Coupled‐Wave Analysis of Holographic Storage in LiNbO3 , 1972 .

[10] J. Huignard,et al. Two‐wave mixing with gain in liquid crystals at 10.6‐μm wavelength , 1988 .