Journal
OPTICS EXPRESS
Volume 17, Issue 23, Pages 20669-20674Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.020669
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Funding
- National Natural Science Foundation of China [10904143]
- Fujian Institute of Research on the Structure of Matter [SZD08001-4]
- Chinese Academy of Sciences [2008DP173016]
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An efficient intracavity KTA optical parametric oscillator (OPO) driven by diode-end-pumped acousto-optical Q-switched Nd:YVO4 laser is demonstrated. The mode mismatch between fundamental cavity and OPO cavity caused by the thermal lens effect in Nd:YVO4 crystal as the pump power increased was studied. To lessen mode mismatch, a thermal lens-like cavity mirror made of plane BK7 glass induced by idler absorption was introduced into the OPO cavity. Under a diode pump power of 20 W, a maximum 1535nm light output power of 3.6 W was achieved at the pulse repetition rate of 60 kHz, corresponding to a diode-to-signal conversion efficiency of 18%. This is the highest efficiency reported for eye-safe laser based on intracavity OPO. (C) 2009 Optical Society of America
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