We report what is to our knowledge the first implementation of a broadband analog intensity modulator composed of two chiral smectic liquid-crystal half-wave retarders. A reflection-mode intensity modulator employing a single active device has also demonstrated achromatic transmission. A quantitative theory for chromatic compensation is presented. By optimum selection of liquid-crystal retardance and orientation, intensity transmission is uniform throughout the visible. The chiral smectic liquid-crystal devices used in the implementation are capable of switching in less than 20 μs.
© 1994 Optical Society of America
Original Manuscript: October 18, 1993
Published: May 15, 1994
Jay E. Stockley, Gary D. Sharp, Dave Doroski, and Kristina M. Johnson, "High-speed analog achromatic intensity modulator," Opt. Lett. 19, 758-760 (1994)