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

Andrew K. Kirby | Zendy; Gordon D. Love | Zendy

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

Author(s) -

Andrew K. Kirby,

Gordon D. Love

Publication year - 2004

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.12.001470

Subject(s) - phase modulation , optics , modulation (music) , phase (matter) , frequency modulation , range (aeronautics) , materials science , physics , acoustics , computer science , bandwidth (computing) , phase noise , telecommunications , quantum mechanics , composite material

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.

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