We demonstrate a widely tunable near-infrared source from 767 nm to 874 nm generated by the intracavity second harmonic generation （SHG） in an optical parametric oscillator pumped by a Yb：LYSO solid-state laser. Th...We demonstrate a widely tunable near-infrared source from 767 nm to 874 nm generated by the intracavity second harmonic generation （SHG） in an optical parametric oscillator pumped by a Yb：LYSO solid-state laser. The home-made Yb：LYSO oscillator centered at 1035 nm delivers an average power of 2 W and a pulse duration as short as 351 fs. TWo MgO doped periodically poled lithium niobates （MgO：PPLN） with grating periods of 28.5-31.5 μm in steps of 0.5 μm and 19.5-21.3μm in steps of 0.2 μm are used for the OPO and intracavity SHG, respectively. The maximum average output power of 180 mW at 798 nm was obtained and the output pulses have pulse duration of 313 fs at 792 nm if a sech2-pulse shape was assumed. In addition, tunable signal femtosecond pulses from 1428 nm to 1763 nm are also realized with the maximum average power of 355 mW at 1628 nm.展开更多
为了获得1.57μm人眼安全激光输出,采用了一种声光调Q激光二极管(LD)端面抽运的Nd∶Gd VO4全固态激光器作为抽运源的人眼安全波长内腔式KTP光学参量振荡器,获得1.57μm人眼安全激光输出。在注入泵浦功率为6.33 W,重复频率为15 k Hz时,1...为了获得1.57μm人眼安全激光输出,采用了一种声光调Q激光二极管(LD)端面抽运的Nd∶Gd VO4全固态激光器作为抽运源的人眼安全波长内腔式KTP光学参量振荡器,获得1.57μm人眼安全激光输出。在注入泵浦功率为6.33 W,重复频率为15 k Hz时,1.57μm激光平均输出功率达到405 m W,此时由二极管注入泵浦光至OPO信号光输出功率的转换效率达6.4%;在重复频率为5 k Hz时,其脉冲宽度约为2 ns,峰值功率达18.9 k W。在重复频率为15 k Hz时,信号光脉冲宽度比消耗后的泵浦光脉冲宽度压缩了13.6倍,比泵浦光脉冲压缩了16倍。实验发现1.57μm的OPO信号光输出功率随脉冲重复频率的增加而有效地增加,此类光参量振荡器有效地压缩了激光脉冲。展开更多
基金supported by the National Key Basic Research Program of China(Grant No.2013CB922402)the National Key Scientific Instruments Development Program of China(Grant No.2012YQ120047)+1 种基金the National Natural Science Foundation of China(Grant Nos.61205130 and 11174361)the Key Deployment Project of Chinese Academy of Sciences(Grant No.KJZD-EW-L11-03)
文摘We demonstrate a widely tunable near-infrared source from 767 nm to 874 nm generated by the intracavity second harmonic generation （SHG） in an optical parametric oscillator pumped by a Yb：LYSO solid-state laser. The home-made Yb：LYSO oscillator centered at 1035 nm delivers an average power of 2 W and a pulse duration as short as 351 fs. TWo MgO doped periodically poled lithium niobates （MgO：PPLN） with grating periods of 28.5-31.5 μm in steps of 0.5 μm and 19.5-21.3μm in steps of 0.2 μm are used for the OPO and intracavity SHG, respectively. The maximum average output power of 180 mW at 798 nm was obtained and the output pulses have pulse duration of 313 fs at 792 nm if a sech2-pulse shape was assumed. In addition, tunable signal femtosecond pulses from 1428 nm to 1763 nm are also realized with the maximum average power of 355 mW at 1628 nm.
文摘为了获得1.57μm人眼安全激光输出,采用了一种声光调Q激光二极管(LD)端面抽运的Nd∶Gd VO4全固态激光器作为抽运源的人眼安全波长内腔式KTP光学参量振荡器,获得1.57μm人眼安全激光输出。在注入泵浦功率为6.33 W,重复频率为15 k Hz时,1.57μm激光平均输出功率达到405 m W,此时由二极管注入泵浦光至OPO信号光输出功率的转换效率达6.4%;在重复频率为5 k Hz时,其脉冲宽度约为2 ns,峰值功率达18.9 k W。在重复频率为15 k Hz时,信号光脉冲宽度比消耗后的泵浦光脉冲宽度压缩了13.6倍,比泵浦光脉冲压缩了16倍。实验发现1.57μm的OPO信号光输出功率随脉冲重复频率的增加而有效地增加,此类光参量振荡器有效地压缩了激光脉冲。
