Efficient cw 532 nm green-light generation is demonstrated using a periodically poled MgO:LiNbO3 ridge waveguide prepared by a process that combines annealed proton exchange and precise dicing. Performance of waveguides with different widths has been investigated. The 6-μm-wide, 1.6-cm-long uncoated ridge waveguide has achieved a green output power of 127 mW under a coupled fundamental light power of 250 mW. The highest conversion efficiency achieved is 53%.
In this paper, a compact efficient diode-pumped solid-state (DPSS) green laser based on a periodically poled MgO:LiNbO 3 (MgO:PPLN) crystal, which is suitable for low-cost mass production, was demonstrated. A linearly polarized 532-nm laser light of 1.02-W CW output power was obtained by employing a simple parallel-plane configuration. A numerical method, based on the 1-D coupled-mode equations, is used in the cavity design and investigation of the intra-cavity secondharmonic-generation process. He is currently enrolled as a Ph.D. student at the Department of Engineering Physics at McMaster University. His research interests involve two-photon excitation fluorescence microscopy, passive optical waveguides, and non-linear optics. He is currently working on periodically poled lithium niobate (PPLN) based photonics devices, including quasiphase-matched (QPM) second-harmonic-generation (SHG), differencefrequency generation (DFG), and other optical non-linear interactions.
Chang-Qing Xu received his B.Sc. and M.Sc. degrees from the University of Science and Technology of China, Hefei, China, in 1985 and 1987, respectively, and his Doctor of Engineering degree from
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