Chinese Journal of Lasers, Volume. 37, Issue 9, 2376(2010)
Intracavity Optical Parametric Oscillator 2.7 μm Laser with Near Diffraction Limit Beam Quality
Near diffraction limit 2.68 μm laser is obtained by intracavity KTP optical parametric oscillation (OPO) pumped by a 1064 nm laser.The experimental results are analyzed in detail.The pump source is an acousto-optical Q-switched Nd:YAG laser,and the OPO is doubly resonated.Two identical KTP crystals are placed with opposite optical axis to compensate the walk-off effect.The crystals are cut as φ=0°,θ=62° to generate 2.7 μm laser.To utilize the large effective nonlinear coefficient,the phase-matching is based on typeⅡ (o→o+e).When the pump power of the 808 nm laser diode is 330 W with a repetition rate of 7 kHz,an average output power of 7.6 W at 2.68 μm is obtained.The output power of the corresponding signal laser of 1.765 μm is about 14 W and the beam quality factor M2 of 2.68 μm laser is less than 1.6.
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Peng Yuefeng, Wei Xingbin, Wang Weimin, Li Deming. Intracavity Optical Parametric Oscillator 2.7 μm Laser with Near Diffraction Limit Beam Quality[J]. Chinese Journal of Lasers, 2010, 37(9): 2376
Received: Jan. 20, 2010
Accepted: --
Published Online: Aug. 19, 2010
The Author Email: Yuefeng Peng (qiaopyf@yahoo.com.cn)