Study of an electro-optic modulator capable of generating simultaneous amplitude and phase modulations

Details Study of an electro-optic modulator capable of generating simultaneous amplitude and phase modulations Study of an electro-optic modulator capable of generating simultaneous amplitude and phase modulations

2003-06-17

arxiv.org/abs/gr-qc/0306077v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 8 figures, 1 table

Scientific paper

10.1364/AO.43.005079

We report on the analysis and prototype-characterization of a dual-electrode electro-optic modulator that can generate both amplitude and phase modulations with a selectable relative phase, termed a universally tunable modulator (UTM). All modulation states can be reached by tuning only the electrical inputs, facilitating real-time tuning, and the device is shown to have good suppression and stability properties. A mathematical analysis is presented, including the development of a geometric phase representation for modulation. The experimental characterization of the device shows that relative suppressions of 38 dB, 39 dB and 30 dB for phase, single-sideband and carrier-suppressed modulations, respectively, can be obtained, as well as showing the device is well-behaved when scanning continuously through the parameter space of modulations. Uses for the device are discussed, including the tuning of lock points in optical locking schemes, single sideband applications, modulation fast-switching applications, and applications requiring combined modulations.

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