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When a z-direction electric field is applied to a PPLN crystal, the periodic crystal domains form a diffraction grating through the electro-optic (EO) effect. Based on this idea, we have previously developed an EO PPLN Bragg Q-switch that is fairly insensitive to the device temperature and laser wavelength [1]. In this paper we report a broadly tunable and highly efficient optical parametric generator (OPG) pumped by a low-voltage Q-switched laser using a PPLN Bragg Q-switch cascaded to a PPLN wavelength converter. The output wavelengths of the optical parametric generator can be widely tuned through temperature variation without affecting the performance of the monolithically integrated EO Bragg Q-switch.
© 2013 Japan Society of Applied Physics, Optical Society of America
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