The first experimental comparison between the actively and passively Q-switched intracavity optical parametric oscillators (IOPOs) at 1.57μm driven by a small-scale diode-pumped Nd:YVO4 laser are thoroughly presented...The first experimental comparison between the actively and passively Q-switched intracavity optical parametric oscillators (IOPOs) at 1.57μm driven by a small-scale diode-pumped Nd:YVO4 laser are thoroughly presented.It is found that the performances of the two types of IOPOs are complementary.The actively Q-switched IOPO features a shorter pulse duration,a higher peak power,and a superior power and pulse stability.However,in terms of compactness,operation threshold and conversion efficiency,passively Q-switched IOPOs are more attractive.It is further indicated that the passively Q-switched IOPO at 1.57 μm is a promising and cost-effective eye-safe laser source,especially at the low and moderate output levels.In addition,instructional improvement measures for the two types of IOPOs are also summarized.展开更多
Both the signal(1.53µm)and idler(3.47µm)performances of a KTA−based optical parametric oscillator(OPO)are presented.The KTA-OPO is intracavity driven by a diode-pumped Nd:YVO_(4)/Cr:YAG passively Q−switched ...Both the signal(1.53µm)and idler(3.47µm)performances of a KTA−based optical parametric oscillator(OPO)are presented.The KTA-OPO is intracavity driven by a diode-pumped Nd:YVO_(4)/Cr:YAG passively Q−switched laser with a quite compact configuration.The signal and idler average output powers up to 941 and 583 mW,respectively,have been achieved,corresponding to an improved diode-to-idler conversion efficiency of 6.5%and a diode-to-OPO(signal+idler)conversion efficiency of 16.9%.At different pump levels,the signal pulse duration and repetition rate are detected to be in the range of 1.8–3.2 ns and 13–112 kHz,respectively.Moreover,near diffraction limited and Gaussian type beam profiles at 1.53 and 3.47µm are also observed.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 61108008the Shandong-Provincial Natural Science Foundation under Grant No ZR2010FQ022the Natural Scientific Research Innovation Foundation in Harbin Institute of Technology under Grant No HIT.NSRIF.201007.
文摘The first experimental comparison between the actively and passively Q-switched intracavity optical parametric oscillators (IOPOs) at 1.57μm driven by a small-scale diode-pumped Nd:YVO4 laser are thoroughly presented.It is found that the performances of the two types of IOPOs are complementary.The actively Q-switched IOPO features a shorter pulse duration,a higher peak power,and a superior power and pulse stability.However,in terms of compactness,operation threshold and conversion efficiency,passively Q-switched IOPOs are more attractive.It is further indicated that the passively Q-switched IOPO at 1.57 μm is a promising and cost-effective eye-safe laser source,especially at the low and moderate output levels.In addition,instructional improvement measures for the two types of IOPOs are also summarized.
基金Supported by the Natural Science Foundation of Shandong Province under Grant No ZR2010FQ022the Natural Scientific Research Innovation Foundation in Harbin Institute of Technology under Grant No HIT-NSRIF-201007the Development Program for Outstanding Young Teachers in Harbin Institute of Technology under Grant No HITQNJS-2009-074.
文摘Both the signal(1.53µm)and idler(3.47µm)performances of a KTA−based optical parametric oscillator(OPO)are presented.The KTA-OPO is intracavity driven by a diode-pumped Nd:YVO_(4)/Cr:YAG passively Q−switched laser with a quite compact configuration.The signal and idler average output powers up to 941 and 583 mW,respectively,have been achieved,corresponding to an improved diode-to-idler conversion efficiency of 6.5%and a diode-to-OPO(signal+idler)conversion efficiency of 16.9%.At different pump levels,the signal pulse duration and repetition rate are detected to be in the range of 1.8–3.2 ns and 13–112 kHz,respectively.Moreover,near diffraction limited and Gaussian type beam profiles at 1.53 and 3.47µm are also observed.
