论文信息 - Reconfigurable multilevel phase holograms for optical switches

Reconfigurable multilevel phase holograms for optical switches

A way of dynamically encoding polarization-insensitive multilevel phase holograms using nematic liquid crystals is presented. The method, using a quarter wave plate and a mirror, allows the optical efficiency of a free space single-mode fiber-to-fiber switch to be greatly enhanced. The validity of the approach has been verified experimentally by observing the power diffracted in the /spl plusmn/1 orders of a nematic liquid crystal grating as a function of input polarization and applied voltage.

[1] Robert J. Mears,et al. Polarisation insensitive operation of ferroelectric liquid crystal devices , 1995 .

[2] E Marom,et al. Dynamic optical interconnections. , 1987, Optics letters.

[3] Craig Tombling,et al. A diffraction based polarisation independent lightvalve , 2000 .

[4] M Yamaguchi,et al. Experiments on a multichannel holographic optical switch with the use of a liquid-crystal display. , 1992, Optics letters.

[5] G D Love. Liquid-crystal phase modulator for unpolarized light. , 1993, Applied optics.

[6] W. Crossland,et al. Holographic optical switching: the "ROSES" demonstrator , 2000, Journal of Lightwave Technology.

[7] B Robertson,et al. Dynamic holography for optical interconnections. II. Routing holograms with predictable location and intensity of each diffraction order. , 2001, Journal of the Optical Society of America. A, Optics, image science, and vision.

[8] M. Handschy,et al. Diffractive ferroelectric liquid-crystal shutters for unpolarized light. , 1991, Optics letters.