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A planar waveguide analysis of the mode extinction modulator in LiNbO3

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2 Author(s)
Ashley, P.R. ; Research Dierectorate, Research, Development, and Engineering Center, U.S. Army Missile Command, Redstone Arsenal, AL, USA ; Chang, W.S.C.

An analysis of the mode extinction modulator is reported based on a step index planar waveguide model. Three modulation mechanisms, the propagation loss, the coupling loss, and the radiative transfer, have been shown to have a significant influence on the transfer function shape and the performance characteristics of the device. The propagation loss effect is shown to play a dominant role in device efficiency and linearity. The operating point of the device can be selected by the choice of physical parameters without the use of a dc bias voltage. Verification of the modulation mechanisms has been demonstrated experimentally.

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Quantum Electronics, IEEE Journal of  (Volume:22 ,  Issue: 6 )