Journal
JOURNAL OF OPTICS
Volume 16, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/16/4/045201
Keywords
ultraviolet laser; harmonic generation; walk-off compensation
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Funding
- National Natural Science Foundation of China (NSFC) [61205120]
- National High Technology Research and Development Program (863 Program) of China [2011AA030208]
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Walk-off compensation using wedged cut type-II LBO was investigated theoretically and experimentally. An algorithm is proposed to find the optimized wedged cut angle to compensate the walk-off effect completely. Using a pulsed Nd:YVO4 MOPA laser as the fundamental frequency infrared (IR) source, 36.3 W 355 nm frequency converted ultraviolet (UV) light was obtained using an optimized wedged cut type-II LBO for walk-off compensated third-harmonic generation (THG), giving a conversion efficiency of 37.1% from IR to UV. A comparative experiment using a conventional cut type-II LBO was also implemented. The results indicate that optimized wedged cutting of type-II LBO is an effective approach for walk-off compensation in efficient THG. The output performance of angle and temperature tuning for wedged cut type-II LBO was also investigated.
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