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Generation of 2- \mu{\rm m} Light Based on a Noncritical Phase Matching OPO Technique

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8 Author(s)
Haiyong Zhu ; College of Physics and Electronic Information, Wenzhou University, Wenzhou, China ; Yanmin Duan ; Zhengrong Feng ; Ge Zhang
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We propose an experimental technique for efficient 2- \mu{\rm m} light generation based on the intracavity noncritical phase matching optical parametric oscillator (OPO). Intra-cavity pumped by a diode pumped actively Q-switched {\rm Nd}{:}{\rm YVO}_{4} laser operating at 1.3 \mu{\rm m} , we have achieved efficient 2093-nm signal beam emission making full use of noncritical phase matching KTA-OPO. At a diode pump power of 9.8 W and a Q-switching repetition rate of 30 kHz, a signal beam with a spectral linewidth of {\sim}{\rm 1}~{\rm nm} and an average power of 1.01 W have been obtained, giving a diode pump power to signal power conversion efficiency of 10.3%. The short pulse width of {\sim}{\rm 3.4}~{\rm ns} is achieved, which is much shorter than other approaches with Q-switched operation to generate 2- \mu{\rm m} laser beams.

Published in:

IEEE Photonics Technology Letters  (Volume:25 ,  Issue: 7 )