A bulk polarization-rotation-based 1 × 2 optical switch is demonstrated by use of a birefringent-mode parallel-rub nematic liquid-crystal cell and a calcite Thompson-prism polarizing beam splitter. With 633-nm linearly polarized light the switch output ports exhibit a >36-dB optical isolation with less than ~0.75 dB of optical insertion loss. A <1.5-ms switching speed is demonstrated for a cascade cell optical arrangement by means of the transient nematic effect with >30 dB of optical isolation and −1.45 dB of optical loss.
© 1994 Optical Society of America
Original Manuscript: May 5, 1994
Published: November 1, 1994
Nabeel A. Riza, "High-optical-isolation low-loss moderate-switching-speed nematic liquid-crystal optical switch," Opt. Lett. 19, 1780-1782 (1994)