LD侧面抽运Nd：YAG激光器的抽运光场均匀性研究
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摘要
本论文通过对激光二极管发光特性的分析研究,建立了二极管侧面抽运激光介质中抽运光功率分布的物理模型与数学模型,采用光线追迹法模拟计算了抽运光功率在激光介质中的分布情况。引入均方差的概念,建立了抽运光功率分布均匀性判定方法。
分别在有水冷和无水冷两种情况下,分析出等间距环绕抽运的激光二极管的个数、激光二极管输出端与工作物质间的距离、工作物质的半径、吸收系数、水冷系统厚度等参数的不同给抽运的均匀性带来的差异。最后,针对双拱形LD侧面抽运Nd:YAG激光器以及水冷条件下LD三向侧面抽运的Nd:YAG激光器这两种实际模型进行模拟,得出设计两种泵浦模块时所采用的激光二极管输出端与工作物质间的距离、工作物质的半径、吸收系数、水冷系统厚度等参数的最佳值,并且最终模拟出在最佳参数情况下两种模型的抽运光功率分布图形。
In this paper,both the physics model and mathematic model of the pump power absorption and distribution in the LD side-pumped solid state laser medium are set up. The pump power distribution in the single diode directly pumped laser rod with different pumped parameters is simulated using the method of ray trace. A method to estimate the distribution of pump power is bring up.
The effect of the different active medium's absorption coefficient , distance between thediode and the laser rod , radius of laser rod and thickness of water collar on the pump powerdistribution in the laser rod is studied under the condition of the laser rod both with cooling system and without cooling system. Finally, optimum parameters are got both in LD side-pumped Nd: YAG laser in which Condenser chamber is in double arched style and LD side-pumped Nd:YAG laser in three direction with water cool system , and the Gauss distribution of the pump power in the two systems with those optimum parameters are got.
分别在有水冷和无水冷两种情况下,分析出等间距环绕抽运的激光二极管的个数、激光二极管输出端与工作物质间的距离、工作物质的半径、吸收系数、水冷系统厚度等参数的不同给抽运的均匀性带来的差异。最后,针对双拱形LD侧面抽运Nd:YAG激光器以及水冷条件下LD三向侧面抽运的Nd:YAG激光器这两种实际模型进行模拟,得出设计两种泵浦模块时所采用的激光二极管输出端与工作物质间的距离、工作物质的半径、吸收系数、水冷系统厚度等参数的最佳值,并且最终模拟出在最佳参数情况下两种模型的抽运光功率分布图形。
In this paper,both the physics model and mathematic model of the pump power absorption and distribution in the LD side-pumped solid state laser medium are set up. The pump power distribution in the single diode directly pumped laser rod with different pumped parameters is simulated using the method of ray trace. A method to estimate the distribution of pump power is bring up.
The effect of the different active medium's absorption coefficient , distance between thediode and the laser rod , radius of laser rod and thickness of water collar on the pump powerdistribution in the laser rod is studied under the condition of the laser rod both with cooling system and without cooling system. Finally, optimum parameters are got both in LD side-pumped Nd: YAG laser in which Condenser chamber is in double arched style and LD side-pumped Nd:YAG laser in three direction with water cool system , and the Gauss distribution of the pump power in the two systems with those optimum parameters are got.
引文
[1]蓝信钜.激光技术[M].北京:科学出版社,2000
[2]Toomas H.Allik.Efficient diode-array-pumped Nd:YAG and Nd:Lu:YAG lasers[J],opt.Lett.,1989,14(2)
[3]F.Brioschi,E.Nava,G.C.Reali.Gain shaping and beam quality in diode-laser multiarray side-pumped solid-state lasers[J].IEEE J.Quantum Electron.,1992,28(4):1070-1074
[4]Yuan liu.Design of side-pumped Nd:YAG lasers,High-Power Lasers and Applications[J].,Vol.4914(2002)
[5]D.Golla,S.Knoke.300-W CW diode-laser side-pumped Nd:YAG rod laser[J].opt,lett.,1995,20(10):1148-1150
[6]Keming Du,Neodymium:YAG 30-W cw laserside pumped by three diode laser bars[J].APPLIED OPTICS,1998,Vol.37,No.12
[7]张华.用蒙特卡罗方法计算棒状放大器内的抽运能量分布[J].光学学报,1997,17(12)
[8]高清松,王卫民.二极管激光器侧抽运波导耦合系统设计[J].强激光与粒子束,2002,14(2):170-172
[9]谌霖,侯霞.激光二极管列阵侧面直接抽运方式的模拟计算和效果评估[J].光学学报,2002,22(7):826-828
[10]赵鸿,姜东升.二极管侧面抽运条件下工作物质增益分布特性研究[J].光学学报,2003,23(1):58-62
[11]刘媛媛,方高瞻.侧面抽运Nd:YAG连续激光器[J].中国激光,2003,30(7):578-580
[12]刘媛媛,方高瞻.LD列阵抽运Nd:YAG连续激光器[J].量子光学学报,8(2):89-92
[13]蔡志强,姚建铨.LD侧泵激光器抽运光和温度分布数值研究[J].光电子·激光,2004,15(11):1306-1310
[14]王海林.二极管侧面抽运连续固体激光器的研究[J].激光器件与元件,2001,22(5)
[15]王海林.高功率固体激光器性能优化与实验研究[C],华中科技大学
[16]赵存华,樊仲维.一种LD侧面抽运固体激光棒光线追迹的数值计算[J],激光技术,2005,29(4):405-406
[17]姚建铨,徐德刚.全固态激光及非线性光学频率变换技术[M].北京:科学出版社
[18]金光勇.1000Hz LD侧面抽运电光调Q Nd:YAG激光器研究[C],长春理工大学
[19]Y.Hirano,Y.Koyata,S.Yamamoto et al..2082W TEM00 operation of a diode-pumped Nd:YAG rod laser [J].Opt.Lett.,1999,24(10):679-681
[20]Ning Jiping,Cai Zhiqiang.Study on uniform of pump distributivity in a LD side-pumped Nd:YAG lasers[J].China journal of laser,2004,31(4):391-394
[21]D.Golla,S.Knoke.300-W CW diode-laser side-pumped Nd:YAG rod laser[J].opt.lett.,1995,20(10):1148-1150
[22]王建华,瞿刚.LD直接侧面抽运棒状介质的光场研究[J].激光技术,2004,28(1):37-41
[23]毕进子.大功率线阵激光二极管侧面抽运Nd:YAG激光器特性研究[J].中国激光,2006,33(1)
[24]毛少卿,黄涛.半导体侧面抽运固体激光器均匀性的计算和分析[J].激光技术,1997,21(3):086-188
[25]高清松,童立新.高功率二极管激光器面阵四通抽运耦合系统[J].激光技术,2005,29(2):136-137
[26]牛彦敏.计算机辅助光学作图系统中光路计算模型[J].重庆师范大学学报(自然科学版),2005,22(2)
[27]MOON H J H,HAN J et al..Efficient diffusive reflector-type diode side-pumped Nd:YAG rod laser with an optical slope efficiency of 55%[J].Appl.Opt.,1999,38(9):1772-1776
[28]梁一平,戴特力.用圆柱透镜准直半导体激光光束的分析[J].激光杂志.2004.25(3):1306-1311
[29]郭云霄,巩马理.LD环形侧面抽运晶体吸收能量分布特性研究[J].激光技术,2006,30(6):571-573k
[30]王建华,金锋等.二极管阵列侧面抽运固体激光介质的光场分布[J].红外与激光工程,2005,34(4):422-426
[31]赵鸿,高福来.工作物质内增益分布特性对激光器性能的影响[J].激光与红外,2002,32(4):251-252
[32]Hua Tan,Weiling Huang,Zhou You et,al..Nd:YAG lasers side-pumped by diode laser arrays[C].SPIE,1999,3862:223-226
[33]Susumu Konno,Tetsuo Kojima,Shuichi Fujikawa et al..High brightness 138 W green laser based on an intracavity-frequency-doubled diode-side-pumped Q-switched Nd:YAGlaser[J].Opt.Lett.,2000,25(2):105-107
[2]Toomas H.Allik.Efficient diode-array-pumped Nd:YAG and Nd:Lu:YAG lasers[J],opt.Lett.,1989,14(2)
[3]F.Brioschi,E.Nava,G.C.Reali.Gain shaping and beam quality in diode-laser multiarray side-pumped solid-state lasers[J].IEEE J.Quantum Electron.,1992,28(4):1070-1074
[4]Yuan liu.Design of side-pumped Nd:YAG lasers,High-Power Lasers and Applications[J].,Vol.4914(2002)
[5]D.Golla,S.Knoke.300-W CW diode-laser side-pumped Nd:YAG rod laser[J].opt,lett.,1995,20(10):1148-1150
[6]Keming Du,Neodymium:YAG 30-W cw laserside pumped by three diode laser bars[J].APPLIED OPTICS,1998,Vol.37,No.12
[7]张华.用蒙特卡罗方法计算棒状放大器内的抽运能量分布[J].光学学报,1997,17(12)
[8]高清松,王卫民.二极管激光器侧抽运波导耦合系统设计[J].强激光与粒子束,2002,14(2):170-172
[9]谌霖,侯霞.激光二极管列阵侧面直接抽运方式的模拟计算和效果评估[J].光学学报,2002,22(7):826-828
[10]赵鸿,姜东升.二极管侧面抽运条件下工作物质增益分布特性研究[J].光学学报,2003,23(1):58-62
[11]刘媛媛,方高瞻.侧面抽运Nd:YAG连续激光器[J].中国激光,2003,30(7):578-580
[12]刘媛媛,方高瞻.LD列阵抽运Nd:YAG连续激光器[J].量子光学学报,8(2):89-92
[13]蔡志强,姚建铨.LD侧泵激光器抽运光和温度分布数值研究[J].光电子·激光,2004,15(11):1306-1310
[14]王海林.二极管侧面抽运连续固体激光器的研究[J].激光器件与元件,2001,22(5)
[15]王海林.高功率固体激光器性能优化与实验研究[C],华中科技大学
[16]赵存华,樊仲维.一种LD侧面抽运固体激光棒光线追迹的数值计算[J],激光技术,2005,29(4):405-406
[17]姚建铨,徐德刚.全固态激光及非线性光学频率变换技术[M].北京:科学出版社
[18]金光勇.1000Hz LD侧面抽运电光调Q Nd:YAG激光器研究[C],长春理工大学
[19]Y.Hirano,Y.Koyata,S.Yamamoto et al..2082W TEM00 operation of a diode-pumped Nd:YAG rod laser [J].Opt.Lett.,1999,24(10):679-681
[20]Ning Jiping,Cai Zhiqiang.Study on uniform of pump distributivity in a LD side-pumped Nd:YAG lasers[J].China journal of laser,2004,31(4):391-394
[21]D.Golla,S.Knoke.300-W CW diode-laser side-pumped Nd:YAG rod laser[J].opt.lett.,1995,20(10):1148-1150
[22]王建华,瞿刚.LD直接侧面抽运棒状介质的光场研究[J].激光技术,2004,28(1):37-41
[23]毕进子.大功率线阵激光二极管侧面抽运Nd:YAG激光器特性研究[J].中国激光,2006,33(1)
[24]毛少卿,黄涛.半导体侧面抽运固体激光器均匀性的计算和分析[J].激光技术,1997,21(3):086-188
[25]高清松,童立新.高功率二极管激光器面阵四通抽运耦合系统[J].激光技术,2005,29(2):136-137
[26]牛彦敏.计算机辅助光学作图系统中光路计算模型[J].重庆师范大学学报(自然科学版),2005,22(2)
[27]MOON H J H,HAN J et al..Efficient diffusive reflector-type diode side-pumped Nd:YAG rod laser with an optical slope efficiency of 55%[J].Appl.Opt.,1999,38(9):1772-1776
[28]梁一平,戴特力.用圆柱透镜准直半导体激光光束的分析[J].激光杂志.2004.25(3):1306-1311
[29]郭云霄,巩马理.LD环形侧面抽运晶体吸收能量分布特性研究[J].激光技术,2006,30(6):571-573k
[30]王建华,金锋等.二极管阵列侧面抽运固体激光介质的光场分布[J].红外与激光工程,2005,34(4):422-426
[31]赵鸿,高福来.工作物质内增益分布特性对激光器性能的影响[J].激光与红外,2002,32(4):251-252
[32]Hua Tan,Weiling Huang,Zhou You et,al..Nd:YAG lasers side-pumped by diode laser arrays[C].SPIE,1999,3862:223-226
[33]Susumu Konno,Tetsuo Kojima,Shuichi Fujikawa et al..High brightness 138 W green laser based on an intracavity-frequency-doubled diode-side-pumped Q-switched Nd:YAGlaser[J].Opt.Lett.,2000,25(2):105-107