Broadband-signal wavelength converter with high damage resistance

Yunlin Chen, Gang Liu, Yanqing Zheng
2009 Optics Letters  
Uniform MgO-doped near-stoichiometric LiNbO 3 was successfully grown from Li-rich melts by a melt supplying technique. Periodically poled domains were demonstrated in MgO-doped near-stoichiometric LiNbO 3 wafers. Efficient quasi-phase-matched difference frequency generation was achieved in a titanium-diffusion waveguide based on periodically poled MgO-doped near-stoichiometric LiNbO 3 . The conversion efficiency was −7.3 dB with a pump power of 150 mW and a signal power of 50 mW at room
more » ... mW at room temperature. It was found that the 3 dB signal conversion bandwidth was as large as 78 nm. Photorefractive damage of the device was examined by pump-probe second-harmonic generation at room temperature, and the device exhibited no significant wavelength shift.
doi:10.1364/ol.34.002480 pmid:19684822 fatcat:yxzz7dqeofbttajqxukc3xxebi