Kovacs effect enhanced broadband large field of view electro-optic modulators in nanodisordered KTN crystals.
OPTICS EXPRESS(2013)
摘要
The unique physical effect-Kovacs effect is explored to enhance the performance of EO modulators by employing the non-thermal equilibrium state nanodisordered KTN crystals created by super-cooling process, which can have a significant 3.5 fold increase in quadratic electro-optic coefficient. This enables to reduce the switching half wave voltage (almost by half) so that a broadband (similar to GHz range) and large field of view (+/-30 deg) electro-optic modulator can be realized with much lowered driving power, which can be very useful for a variety of applications: laser Q-switches, laser pulse shaping, high speed optical shutters and modulating retro reflectors. (C) 2013 Optical Society of America
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关键词
kerr effect,birefringence,crystal optics,switching
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