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Advances in OptoElectronics
Volume 2008 (2008), Article ID 151487, 4 pages
http://dx.doi.org/10.1155/2008/151487
Research Article

High-Efficiency Intracavity Continuous-Wave Green-Light Generation by Quasiphase Matching in a Bulk Periodically Poled MgO: L i N b O 3 Crystal

1Division of Opto-Electronics System, Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100085, China
2Graduate University of Chinese Academy of Sciences (GUCAS), Beijing 100080, China
3R&D Department, Phoebus Vision Opto-Electronics Technology Ltd., Beijing 100094, China

Received 29 March 2008; Accepted 18 August 2008

Academic Editor: Yalin Lu

Copyright © 2008 Shaowei Chu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

908 mW of green light at 532 nm were generated by intracavity quasiphase matching in a bulk periodically poled MgO: L i N b O 3 (PPMgLN) crystal. A maximum optical-to-optical conversion efficiency of 33.5% was obtained from a 0.5 mm thick, 10 mm long, and 5 mol% MgO: L i N b O 3 crystal with an end-pump power of 2.7 W at 808 nm. The temperature bandwidth between the intracavity and single-pass frequency doubling was found to be different for the PPMgLN. Reliability and stability of the green laser were evaluated. It was found that for continuous operation of 100 hours, the output stability was better than 97.5% and no optical damage was observed.