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Fast, large and controllable phase modulation using dual frequency liquid crystals.

By A. K. Kirby and G. D. Love


We report on a method for high speed, large stroke phase modulation using dual frequency control of liquid crystals. Our system uses an all-electronic feedback system in order to simplify the control. We show half wave phase modulations of ~120Hz with the operating point varying over nearly the full dynamic range of the device, and demonstrate larger phase shifts (2.5 waves) at a frequency of 37Hz. For large phase shifts, the speeds are an order of magnitude faster than existing techniques

Topics: Optical devices, Liquid-crystal devices.
Publisher: Optical Society of America
Year: 2004
DOI identifier: 10.1364/OPEX.12.001470
OAI identifier:

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