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

Kirby, A. K. and Love, G. D. (2004) 'Fast, large and controllable phase modulation using dual frequency liquid crystals.', Optics express., 12 (7). pp. 1470-1475.


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.

Item Type:Article
Keywords:Optical devices, Liquid-crystal devices.
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Record Created:28 Feb 2008
Last Modified:10 Nov 2010 13:01

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