Nd:YAG/Cr~(4+):YAG/YAG键合晶体调Q激光输出特性研究
|
摘要
对激光二极管端面抽运Nd:YAG/Cr~(4+):YAG/YAG键合晶体的1 064nm被动调Q激光性能进行了研究.对比分析了Cr~(4+):YAG晶体初始透过率分别为84.9%和90.6%的调Q激光输出特性,以及不同耦合输出镜透过率对调Q性能的影响.结果表明,在特定抽运功率下,各输出特性参数的优化(高输出功率,高重复频率,窄脉冲宽度)分别对应一个最佳的输出镜透过率;随着抽运功率增加,对应最佳的输出镜透过率越大.对比两种初始透过率的Cr~(4+):YAG晶体对应的激光输出特性,84.9%初始透过率的晶体获得相对较低的平均输出功率,但相应的重复频率较小,脉冲宽度窄,使得调Q激光的峰值功率明显提高.采用30%透过率的耦合输出镜和10.4 W入射抽运功率下,获得了3.2 W平均输出功率、9.7ns脉冲宽度和52kHz重复频率的激光输出,经计算可知峰值功率达6.3kW.
The output characteristics of a passively Q-switched Nd:YAG/Cr~(4+):YAG/YAG composite crystal laser at 1 064 nm was studied with diode-end-pumped system.The laser output characteristic parameters were compared among five output couplers with different transmittance,and between two Cr~(4+):YAG crystals with initial transmittance of 84.1%and 90.6%.The experiment results show that the output parameters as average output power,pulse repetition frequency and pulse width could be optimized with transmittance of the output coupler.And the optimized transmittance also increased with the pump power.By the comparison of laser output characteristics between two crystals with different initial transmittance,the crystal having initial transmittance of 84.9% produced relatively low average power output,but its low pulse repetition frequency and narrow pulse width made the Q-switched laser peak power improved significantly.Under the incident pump power of 10.4 W,the maximum outputpower of 3.2 W was obtained using the output coupler with 30% transmittance.The calculated peak power was up to 6.3 kW as corresponding pulse width and pulse repetition frequency of 9.7 ns and 52 kHz,respectively.
The output characteristics of a passively Q-switched Nd:YAG/Cr~(4+):YAG/YAG composite crystal laser at 1 064 nm was studied with diode-end-pumped system.The laser output characteristic parameters were compared among five output couplers with different transmittance,and between two Cr~(4+):YAG crystals with initial transmittance of 84.1%and 90.6%.The experiment results show that the output parameters as average output power,pulse repetition frequency and pulse width could be optimized with transmittance of the output coupler.And the optimized transmittance also increased with the pump power.By the comparison of laser output characteristics between two crystals with different initial transmittance,the crystal having initial transmittance of 84.9% produced relatively low average power output,but its low pulse repetition frequency and narrow pulse width made the Q-switched laser peak power improved significantly.Under the incident pump power of 10.4 W,the maximum outputpower of 3.2 W was obtained using the output coupler with 30% transmittance.The calculated peak power was up to 6.3 kW as corresponding pulse width and pulse repetition frequency of 9.7 ns and 52 kHz,respectively.
引文
[1]MA Y,HE Y,YU X,et al.Multiple-beam,pulse-burst,passively Q-switched ceramic Nd∶YAG laser under microlens array pumping[J].Optical Express,2015,23(19):24955-24961.
[2]FENG C,LIU M,LI Y,et al.Gold nanorods saturable absorber for Q-switched Nd∶GAGG lasers at 1μm[J].Applied Physics B,2017,123(3):81.
[3]WAN Y,ZHU D,ZENG Q,et al.Brewster-oriented passive Q-switch intracavity optical parametric oscillator[J].Chinese Physics,2005,14(4):714-719.
[4]OUSLIMANI H,BASTRAD L,BROQUIN J.Narrow-linewidth Q-switched DBR laser on Ytterbium-doped glass[J].Ceramics International,2015,41(7):8650-8654
[5]MEN S,LIU Z,CONG Z,et al.Tunable narrow line-width LiF∶F-2(-)color center laser[J].Optics Communication,2014,324(15):160-164.
[6]MEN S,LIU Z,CONG Z,et al.High-repetition-rate widely tunable LiF∶F-2(-)color center lasers[J].Laser Physics,2016,26(2):205806.
[7]JAMBUNATHAN V,NAVRATIL P,MIURA T,et al.Cryogenic Yb∶YGAG ceramic laser pumped at 940nm and zero-phonon-line:a comparative study[J].Optical Materals Express,2017,7(2):477-483.
[8]PAVEL N,DASCALU T,SALAMU G,et al.Ignition of an automobile engine by high-peak power Nd∶YAG/Cr4+∶YAG laser-spark devices[J].Optics Express,2015,23(26):33028-33037.
[9]JIANG Wei,HE Qing,CHEN Zhen-qiang,et al.LD Side-pumped laser based on Nd∶YAG/Cr∶YAG/YAG composite crystal[J].Acta Photonica Sinica,2014,43(4):0414002.江炜,何青,陈振强,等.基于Nd∶YAG/Cr∶YAG/YAG键合晶体LD侧面泵浦激光器[J].光子学报,2014,43(4):0414002.
[10]WARITANTANT T,MAJOR A.Discretely selectable multiwavelength operation of a semiconductor saturable absorber mirror mode-locked NdYVO4laser[J].Optics Letters,2017,42(17):3331-3334.
[11]AHMAD H,ZULKIFLI A Z,THAMBIRATNAM K.Tunable Q-switched erbium-doped fiber laser based on curved multimode fiber and grapheneoxide saturable absorber[J].Laser Physics,2017,27(5):055103.
[12]FENG De-jun,HUANG Wen-yu,JIANG Zhou-zhen,et al.Few-layer graphene membrane as an ultrafast mode-locker in erbium-doped fiber laser[J].Acta Physica Sinica,2013,62(5):054202.冯德军,黄文育,姜守振,等.基于少数石墨烯可饱和吸收的锁模光纤激光器[J].物理学报,2013,62(5):054202.
[13]LIN W,DUAN X,CUI Z,et al.A passively Q-switched Ho∶YVO4laser at 2.05μm with graphene saturable absorber[J].Applied Sciences-Basel,2016,6(5):128-134.
[14]ORTEG M G,KUZIN E,ZACA M P,et al.Photodeposition of SWCNTs onto the optical fiber end to assemble a Qswitched Er3+-doped fiber laser[J].Optics And laser technology,2016,91(1):32-35.
[15]CHEN Y,ZHAO C,CHEN S,et al.Large energy,wavelength widely tunable,topological insulator Q\|switched erbium-doped fiber laser[J].IEEE Journal of Selected Topics in Quantum Electronics,2014,20(5):315-322.
[16]AGNESI A,DELL A S,CHEBEL M B,et al.Diode-pumped neodymium lasers repetitively Q-switched by Cr∶YAG solid-state saturable absorbers[J].IEEE Journal of selected topics in Quantum Electron,1997,3(1):45-52.
[17]FELDMAN R,SHIMONY Y,BURSHTEIN Z.Passive Q-switching in NdYAG/Cr4+∶YAG monolithic microchip laser[J].Optical Materials,2003,24(1-2):393-399.
[18]HE Y,MA Y,LI J,et al.Continuous-wave and passively Q-switched 1.06μm ceramic Nd∶YAG laser[J].Optics&Laser Technology,2016,81:46-49.
[19]LIU F,XIA H,PAN S,et al.Passively Q-switched NdLuVO4laser using Cr4+∶YAG as saturable absorber[J].Optics&Laser Technology,2007,39(7):1449-1453.
[20]ZHANG X,ZHAO S,WANG Q,et al.Laser diode pumped Cr4+YAG passively Q-switched Nd3+∶S-FAP laser[J].Optics Communication,1998,155(1-3):55-60.
[21]JIANG Xin-Ying,ZHENG Jian-Gang,DUAN Wen-Tao,et al.Theoretical and experimental research on output characteristics of Cr4+∶YAG passively Q-switched laser[J].High Power Laser and Particle Beams,2011,23(3):586-588.蒋新颖,郑建刚,段文涛,等.Cr4+∶YAG被动调Q激光器输出特性[J].强激光与粒子束,2011,23(3):586-588.
[22]ZHANG Xue-xia,GE Ting-wu,DING Xing,et al.Study of continuous fiber laser with distributed pump structure[J].Chinese Journal of Luminescence,2016,37(9):1071-1075张雪霞,葛廷武,丁星,等.分布式抽运连续光纤激光器研究[J].发光学报,2016,37(9):1071-1075
[23]KANG Zhe,LIU Ming-yi,LIU Cheng-zhi,et al.Passively Q\|switched Yb3+-doped fiber laser based on microfibersingle wall carbon nanotube saturable absorber[J].Chinese Journal of Luminescence,2017,38(5):630-635.康?,刘明奕,刘承志,等.基于微纳光纤-单壁碳纳米管可饱和吸收体的被动调Q掺镱光纤激光器[J].发光学报,2017,38(5):630-635.
[24]WANG H,YANG X,ZHAO S,et al.2ns pulse,compact and reliable microchip lasers by Nd∶YAG/Cr4+∶YAG composite crystal[J].Solid State and Liquid Lasers,2009,19(8):1824-1827.
[2]FENG C,LIU M,LI Y,et al.Gold nanorods saturable absorber for Q-switched Nd∶GAGG lasers at 1μm[J].Applied Physics B,2017,123(3):81.
[3]WAN Y,ZHU D,ZENG Q,et al.Brewster-oriented passive Q-switch intracavity optical parametric oscillator[J].Chinese Physics,2005,14(4):714-719.
[4]OUSLIMANI H,BASTRAD L,BROQUIN J.Narrow-linewidth Q-switched DBR laser on Ytterbium-doped glass[J].Ceramics International,2015,41(7):8650-8654
[5]MEN S,LIU Z,CONG Z,et al.Tunable narrow line-width LiF∶F-2(-)color center laser[J].Optics Communication,2014,324(15):160-164.
[6]MEN S,LIU Z,CONG Z,et al.High-repetition-rate widely tunable LiF∶F-2(-)color center lasers[J].Laser Physics,2016,26(2):205806.
[7]JAMBUNATHAN V,NAVRATIL P,MIURA T,et al.Cryogenic Yb∶YGAG ceramic laser pumped at 940nm and zero-phonon-line:a comparative study[J].Optical Materals Express,2017,7(2):477-483.
[8]PAVEL N,DASCALU T,SALAMU G,et al.Ignition of an automobile engine by high-peak power Nd∶YAG/Cr4+∶YAG laser-spark devices[J].Optics Express,2015,23(26):33028-33037.
[9]JIANG Wei,HE Qing,CHEN Zhen-qiang,et al.LD Side-pumped laser based on Nd∶YAG/Cr∶YAG/YAG composite crystal[J].Acta Photonica Sinica,2014,43(4):0414002.江炜,何青,陈振强,等.基于Nd∶YAG/Cr∶YAG/YAG键合晶体LD侧面泵浦激光器[J].光子学报,2014,43(4):0414002.
[10]WARITANTANT T,MAJOR A.Discretely selectable multiwavelength operation of a semiconductor saturable absorber mirror mode-locked NdYVO4laser[J].Optics Letters,2017,42(17):3331-3334.
[11]AHMAD H,ZULKIFLI A Z,THAMBIRATNAM K.Tunable Q-switched erbium-doped fiber laser based on curved multimode fiber and grapheneoxide saturable absorber[J].Laser Physics,2017,27(5):055103.
[12]FENG De-jun,HUANG Wen-yu,JIANG Zhou-zhen,et al.Few-layer graphene membrane as an ultrafast mode-locker in erbium-doped fiber laser[J].Acta Physica Sinica,2013,62(5):054202.冯德军,黄文育,姜守振,等.基于少数石墨烯可饱和吸收的锁模光纤激光器[J].物理学报,2013,62(5):054202.
[13]LIN W,DUAN X,CUI Z,et al.A passively Q-switched Ho∶YVO4laser at 2.05μm with graphene saturable absorber[J].Applied Sciences-Basel,2016,6(5):128-134.
[14]ORTEG M G,KUZIN E,ZACA M P,et al.Photodeposition of SWCNTs onto the optical fiber end to assemble a Qswitched Er3+-doped fiber laser[J].Optics And laser technology,2016,91(1):32-35.
[15]CHEN Y,ZHAO C,CHEN S,et al.Large energy,wavelength widely tunable,topological insulator Q\|switched erbium-doped fiber laser[J].IEEE Journal of Selected Topics in Quantum Electronics,2014,20(5):315-322.
[16]AGNESI A,DELL A S,CHEBEL M B,et al.Diode-pumped neodymium lasers repetitively Q-switched by Cr∶YAG solid-state saturable absorbers[J].IEEE Journal of selected topics in Quantum Electron,1997,3(1):45-52.
[17]FELDMAN R,SHIMONY Y,BURSHTEIN Z.Passive Q-switching in NdYAG/Cr4+∶YAG monolithic microchip laser[J].Optical Materials,2003,24(1-2):393-399.
[18]HE Y,MA Y,LI J,et al.Continuous-wave and passively Q-switched 1.06μm ceramic Nd∶YAG laser[J].Optics&Laser Technology,2016,81:46-49.
[19]LIU F,XIA H,PAN S,et al.Passively Q-switched NdLuVO4laser using Cr4+∶YAG as saturable absorber[J].Optics&Laser Technology,2007,39(7):1449-1453.
[20]ZHANG X,ZHAO S,WANG Q,et al.Laser diode pumped Cr4+YAG passively Q-switched Nd3+∶S-FAP laser[J].Optics Communication,1998,155(1-3):55-60.
[21]JIANG Xin-Ying,ZHENG Jian-Gang,DUAN Wen-Tao,et al.Theoretical and experimental research on output characteristics of Cr4+∶YAG passively Q-switched laser[J].High Power Laser and Particle Beams,2011,23(3):586-588.蒋新颖,郑建刚,段文涛,等.Cr4+∶YAG被动调Q激光器输出特性[J].强激光与粒子束,2011,23(3):586-588.
[22]ZHANG Xue-xia,GE Ting-wu,DING Xing,et al.Study of continuous fiber laser with distributed pump structure[J].Chinese Journal of Luminescence,2016,37(9):1071-1075张雪霞,葛廷武,丁星,等.分布式抽运连续光纤激光器研究[J].发光学报,2016,37(9):1071-1075
[23]KANG Zhe,LIU Ming-yi,LIU Cheng-zhi,et al.Passively Q\|switched Yb3+-doped fiber laser based on microfibersingle wall carbon nanotube saturable absorber[J].Chinese Journal of Luminescence,2017,38(5):630-635.康?,刘明奕,刘承志,等.基于微纳光纤-单壁碳纳米管可饱和吸收体的被动调Q掺镱光纤激光器[J].发光学报,2017,38(5):630-635.
[24]WANG H,YANG X,ZHAO S,et al.2ns pulse,compact and reliable microchip lasers by Nd∶YAG/Cr4+∶YAG composite crystal[J].Solid State and Liquid Lasers,2009,19(8):1824-1827.