报道了基于非临界相位匹配磷酸钛氧铷晶体(RTP)的光参量振荡激光性能研究。采用激光二极管端面抽运Nd:YAP激光晶体,组成内腔式RTP-OPO系统,对比了在不同声光调Q重复频率下的信号光输出特性。在20 k Hz重复频率和13.1 W的抽运入射功率下...报道了基于非临界相位匹配磷酸钛氧铷晶体(RTP)的光参量振荡激光性能研究。采用激光二极管端面抽运Nd:YAP激光晶体,组成内腔式RTP-OPO系统,对比了在不同声光调Q重复频率下的信号光输出特性。在20 k Hz重复频率和13.1 W的抽运入射功率下,获得平均功率1.1 W的1.65μm人眼安全激光的输出,光-光转化效率为8.4%;在重复频率为5 k Hz时,获得了最窄脉4.4 ns,最高单脉冲峰值功率30.8 k W。结果表明,基于RTP晶体的OPO变频是获得1.6μm波段激光的一种有效新途径。展开更多
Low threshold and compact cw Nd:YVO_(4)self-Raman lasers at 1176 nm and sum-frequency mixing of fundamental and first-Stokes wavelengths are demonstrated.A 20-mm Nd:YVO_(4)crystal is adopted in a compact plane-concave...Low threshold and compact cw Nd:YVO_(4)self-Raman lasers at 1176 nm and sum-frequency mixing of fundamental and first-Stokes wavelengths are demonstrated.A 20-mm Nd:YVO_(4)crystal is adopted in a compact plane-concave resonator.The results show that the cw Raman conversion is sensitive to cavity length.At an incident pump power of 22.5 W,output power of 1.53 W at 1175.6 nm is achieved,corresponding to the threshold of only 0.8 W and the slop efficiency of 8.1%.Intra-cavity sum-frequency generation is realized in a type-Ⅱphase-matching cut KTP crystal,480 m W at 558.6 nm is obtained at incident pump power of 12 W.展开更多
A diode end-pumped acousto-optic Q-switched Nd:YVO_4/LuVO_4 Raman laser is demonstrated. Both YVO_4 and LuVO_4 can work as Raman gain, and slightly different active vibration modes of both crystals can result in diffe...A diode end-pumped acousto-optic Q-switched Nd:YVO_4/LuVO_4 Raman laser is demonstrated. Both YVO_4 and LuVO_4 can work as Raman gain, and slightly different active vibration modes of both crystals can result in different first-Stokes wavelengths. The output characteristic as the Raman competition between YVO_4 and LuVO_4 crystals for the laser systems with both shared cavity and coupled cavity is experimentally investigated.For the shared cavity, simultaneous Raman conversion in both YVO_4 and LuVO_4 crystals is achieved with dualwavelength emission at 1175.8 and 1177.1 nm. The maximum output power of 1.03 W and the conversion efficiency of 10.3% are obtained. The 0.84 W single first Stokes wavelength at 1177.1 nm with LuVO_4 Raman conversion is achieved with the coupled cavity. The results show that the coupled cavity with short Raman cavity can obtain a narrow pulse width. The separated laser crystal and Raman gain media with different vanadates in shared cavity have advantages in achieving dual-wavelength lasers with small frequency intervals.展开更多
文摘报道了基于非临界相位匹配磷酸钛氧铷晶体(RTP)的光参量振荡激光性能研究。采用激光二极管端面抽运Nd:YAP激光晶体,组成内腔式RTP-OPO系统,对比了在不同声光调Q重复频率下的信号光输出特性。在20 k Hz重复频率和13.1 W的抽运入射功率下,获得平均功率1.1 W的1.65μm人眼安全激光的输出,光-光转化效率为8.4%;在重复频率为5 k Hz时,获得了最窄脉4.4 ns,最高单脉冲峰值功率30.8 k W。结果表明,基于RTP晶体的OPO变频是获得1.6μm波段激光的一种有效新途径。
文摘通过LD端面抽运Nd∶YAG激光腔镜膜系的合理设计,抑制Nd∶YAG晶体最强跃迁对应的1064 nm波长和相邻的1319 nm波长的激光振荡,成功实现了1338 nm单波长激光输出。实验中对比了平平和平凹腔型,研究了连续运转和声光调Q模式下的激光输出。连续运转模式时,在12.9 W的抽运功率下,获得了最高3.25 W的1338 nm激光输出;声光调Q模式下,1338 nm激光的平均输出功率和脉冲宽度随着重复频率的减小而下降。在12.9 W的抽运功率下,当声光调Q重复频率从15 k Hz减少到5 k Hz,平均输出功率由2.8 W降低到1.9 W,对应的脉冲峰值功率由1.7 k W升高到5.4 k W。
基金Supported by the National Natural Science Foundation of China(10904143)the Fund of Key Laboratory of Optoelectronic Materials Chemistry and Physics,Chinese Academy of Sciences(2008DP173016)。
文摘Low threshold and compact cw Nd:YVO_(4)self-Raman lasers at 1176 nm and sum-frequency mixing of fundamental and first-Stokes wavelengths are demonstrated.A 20-mm Nd:YVO_(4)crystal is adopted in a compact plane-concave resonator.The results show that the cw Raman conversion is sensitive to cavity length.At an incident pump power of 22.5 W,output power of 1.53 W at 1175.6 nm is achieved,corresponding to the threshold of only 0.8 W and the slop efficiency of 8.1%.Intra-cavity sum-frequency generation is realized in a type-Ⅱphase-matching cut KTP crystal,480 m W at 558.6 nm is obtained at incident pump power of 12 W.
基金Supported by the Zhejiang Provincial Natural Science Foundation of China under Grant No LY19F050012the National Natural Science Foundation of China under Grant No 61505147+1 种基金the Laboratory Open Project of Wenzhou University under Grant No 18SK31the Research Funds of College Student Innovation of Zhejiang Province under Grant No 2018R42901
文摘A diode end-pumped acousto-optic Q-switched Nd:YVO_4/LuVO_4 Raman laser is demonstrated. Both YVO_4 and LuVO_4 can work as Raman gain, and slightly different active vibration modes of both crystals can result in different first-Stokes wavelengths. The output characteristic as the Raman competition between YVO_4 and LuVO_4 crystals for the laser systems with both shared cavity and coupled cavity is experimentally investigated.For the shared cavity, simultaneous Raman conversion in both YVO_4 and LuVO_4 crystals is achieved with dualwavelength emission at 1175.8 and 1177.1 nm. The maximum output power of 1.03 W and the conversion efficiency of 10.3% are obtained. The 0.84 W single first Stokes wavelength at 1177.1 nm with LuVO_4 Raman conversion is achieved with the coupled cavity. The results show that the coupled cavity with short Raman cavity can obtain a narrow pulse width. The separated laser crystal and Raman gain media with different vanadates in shared cavity have advantages in achieving dual-wavelength lasers with small frequency intervals.
