Title :
Low-crosstalk 1*2 optical switch composed of twisted nematic liquid crystal cells
Author_Institution :
NTT Transmission Syst. Lab., Kanagawa, Japan
Abstract :
A low-crosstalk structure for a 1*2 optical switch using twisted nematic liquid crystal (TN-LC) cells is proposed. Low crosstalk can be obtained by using a walkoff polarizing beam splitter between two TN-LC cells mutually controlled in opposite states. A 1*2 polarization-independent optical switch is assembled using single-mode fibers. Its insertion loss and crosstalk, in both switching modes, are >
Keywords :
crosstalk; light polarisation; liquid crystal devices; nematic liquid crystals; optical elements; optical losses; optical switches; 1*2 optical switch; 1.6 dB; 37.1 dB; insertion loss; low-crosstalk structure; polarization-independent optical switch; single-mode fibers; switching modes; twisted nematic liquid crystal cells; walkoff polarizing beam splitter; Assembly; Azimuth; Crosstalk; Insertion loss; Liquid crystals; Optical fiber communication; Optical fiber polarization; Optical losses; Optical polarization; Optical switches;
Journal_Title :
Photonics Technology Letters, IEEE
