Chinese Optics Letters, 2008, 6 (3): 03204, Published Online: Mar. 27, 2008
Low-threshold mid-IR MgO:PPLN optical parametric generation with high reflectivity mirror for signal wavelength 
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光参量产生器(OPG) Nd:YLF激光 中红外激光 可调谐 190.4970 Parametric oscillators and amplifiers 140.3600 Lasers, tunable 140.3070 Infrared and far-infrared lasers
Abstract
A low-threshold middle-infrared (mid-IR) MgO:PPLN optical parametric generation (OPG) pumped by a laser diode (LD) end-pumped Z-type Nd:YLF laser at 1047 nm is realized with high reflectivity(HR) mirror for signal. At repetition rate of 10 kHz, the OPG threshold of 50 'mu'J has been achieved with HR mirror for signal. Compared with the threshold without mirror, the threshold decreases by 17%. Using HR mirror for pump at output side of crystal, the threshold of 40 'mu'J is achieved. The 2.7-4.1 'mu'm continuous tunable output is produced with seven grating periods from 28.5 to 31.5 'mu'm and temperatures from 30 to 200 . When the incident average pump power is 3 W, the OPG idler output power is 0.46 W at 3.26 'mu'm, which corresponds to optical-to-optical conversion efficiency up to 15.3%.
Xingbao Zhang, Yuezhu Wang, Youlun Ju, Baoquan Yao, Yunjun Zhang. Low-threshold mid-IR MgO:PPLN optical parametric generation with high reflectivity mirror for signal wavelength[J]. Chinese Optics Letters, 2008, 6(3): 03204.
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