高级检索

LD端面抽运变导热系数Nd:YAG晶体热效应

李隆, 甘安生, 齐兵, 支音, 王良甚, 史彭

李隆, 甘安生, 齐兵, 支音, 王良甚, 史彭. LD端面抽运变导热系数Nd:YAG晶体热效应[J]. 激光技术, 2012, 36(5): 612-616. DOI: 10.3969/j.issn.1001-3806.2012.05.009
引用本文: 李隆, 甘安生, 齐兵, 支音, 王良甚, 史彭. LD端面抽运变导热系数Nd:YAG晶体热效应[J]. 激光技术, 2012, 36(5): 612-616. DOI: 10.3969/j.issn.1001-3806.2012.05.009
LI Long, GAN An-sheng, QI Bing, ZHI Yin, WANG Liang-shen, SHI Peng. Thermal effect of LD end-pumped Nd:YAG crystal with variable thermal conductivity[J]. LASER TECHNOLOGY, 2012, 36(5): 612-616. DOI: 10.3969/j.issn.1001-3806.2012.05.009
Citation: LI Long, GAN An-sheng, QI Bing, ZHI Yin, WANG Liang-shen, SHI Peng. Thermal effect of LD end-pumped Nd:YAG crystal with variable thermal conductivity[J]. LASER TECHNOLOGY, 2012, 36(5): 612-616. DOI: 10.3969/j.issn.1001-3806.2012.05.009

LD端面抽运变导热系数Nd:YAG晶体热效应

基金项目: 

西安市科技局创新支撑计划资助项目(CXY1015(6));陕西省教育厅专项科研计划资助项目(11JK0532)

详细信息
    作者简介:

    李隆(1972- ),男,博士,教授,从事全固态激光器及其应用、超快激光光谱特性等方面的研究,E-mail:lilong7211@126.com

  • 中图分类号: TN248.1

Thermal effect of LD end-pumped Nd:YAG crystal with variable thermal conductivity

  • 摘要: 为了计算二极管抽运Nd:YAG晶体温度场及热形变场,建立了端面绝热、周边恒温的晶体热模型。基于Nd:YAG晶体导热系数及热形变系数与其温度的函数关系,应用Newton切线法对热传导方程进行求解,得到了变导热系数和变热形变系数矩形截面Nd:YAG晶体端面抽运下的温度场和热形变场的一般表达式,同时计算了Nd:YAG晶体在不同抽运功率和抽运光斑半径下内部温度场和热形变场的分布变化。结果表明,使用钕离子质量分数为0.01、尺寸为3mm×3mm×8mm的Nd:YAG晶体,在功率为60W、光斑半径为450μm的抽运光照射下,变导热系数的Nd:YAG晶体端面最大温升为55.7℃,最大热形变量为2.85μm,而按传统将Nd:YAG晶体导热系数、热形变系数均视为定值时,晶体端面最大温升为43.4℃,端面最大热形变为2.84μm。
    Abstract: In order to calculate temperature field and thermal distortion field of laser diode end-pumped Nd:YAG crystal,the temperature thermal model of the crystal was built under the condition of thermal isolation of the end face and constant peripheral temperature.Based on the function of temperature of the Nd:YAG crystal depending upon the thermal conductivity and thermal distortion coefficient,after the thermal model of heat conduction equations were solved by means of the Newton tangent method,the general equations of the temperature field and thermal distortion field of the end-pumped rectangular cross section Nd:YAG crystal with variable thermal conductivity and thermal distortion coefficient were obtained.Then the internal temperature field distribution and thermal distortion field were calculated under different of pump power and pump spot size.Results show that under the condition of 0.01 Nd ion mass fraction,60W pump power and 450μm pump spot radius,the maximum temperature rise on the end face of the Nd:YAG crystal in 3mm×3mm×8mm was 55.7℃,and the maximum thermal distortion was 2.85μm. However,traditionally the thermal conductivity and thermal distortion coefficient were taken as constant,the maximum temperature rise on the end face of the Nd:YAG crystal was 43.4℃and the maximum thermal distortion was 2.84μm.
  • [1]

    ZHENG X F,SHI P,LIU W,et al.Thermal effect of Nd:GdVO4 crystal pumped by variable radius by LD[J].Laser Technology,2008, 32(6):642-644(in Chinese).

    [1]

    ZHANG H L,DU K M.Diode laser end-pumped electro-optically Qswitched Nd:YAG slab laser systems[J].Infrared and Laser Engineering,2008,37(s1):42-44(in Chinese).

    [2]

    ZHANG X Y,ZHAO Sh Zh.Study on thermal lens of Nd3+:YAG laser pumped by a laser diode[J].Chinese Journal of Lasers,2000,27 (9):777-778(in Chinese).

    [3]

    LI L,NIE J P,SHI P,et al.Temperature field characteristics of thermal conductive anisotropic laser rods by LD end-pumped[J].Optics and Precision Engineering,2009,17(12):2931-2938(in Chinese).

    [4]

    OU Q F,CHEN J G,FENG G Y,et al.Analyses of transient temperature and thermal stress distribution in ring laser diode array pumped laser rod[J].Acta Optica Sinica,2004,24(6):803-807(in Chinese).

    [5]

    LÜB D.Solid-state lasers[M].Beijing:Beijing University of Post and Telecommunication Press,2002:234-235(in Chinese).

    [6]

    ZHU H Y,ZHANG G,HUANG Ch H,et al.Temperature characteristics analysis of double-end-pumped heat-capacity laser[J].Acta Photonica Sinica,2007,36(5):773-776(in Chinese).

    [7]

    XIE W J,TAM S Ch,YANG H R,et al.Heat transfer for diode sidepumped YAG slabs[J].Optics&Laser Technology,1999,31(7):521-528.

    [8]

    LI F,LIU R,BAI J T,et al.Investigation on temperature and thermal lens effects of laser diode pumped composite YAG rods[J].Laser Technology,2008,32(1):101-104(in Chinese).

    [9]

    BROWN D C,NELSON R,BILLINGS L.Efficient CW endpumped,end-cooled Nd:YVO4 diode-pumped laser[J].Applied Optics,1997,36(33):8611-8613.

    [10]

    SHEN Y M,ZHANG Y F,HOU T J,et al.Comparisons of temperature field and stress field between heat-capacity laser and solid steady state laser[J].High Power Laser and Particle Beams,2006, 18(11):1804-1808(in Chinese).

    [11]

    SHI P,LI L,GAN A Sh,et al.Thermal effect of rectangle composite YAG-Nd:YAG laser crystal by LD end-pumped[J].Journal of Optoelectronics·Laser,2006,17(12):1461-1465(in Chinese).

    [12]

    NADGARAN H,SABAIAN M.Pulsed pump thermal effect s in solid state lasers under super-Gaussian pulses[J].Paramana Journal of Physics,2006,67(6):1119-1128.

    [13]

    YU J,TAN H M,QIAN L Sh,et al.Theoretical study on thermal beam focusing in longitudinally-pumped solid-state laser rods[J].High Power Laser and Particle Beams,2000,12(1):27-31(in Chinese).

    [14]

    SHI P,LI L,GAN A Sh,et al.Thermal effect research of end pumpedrect angle Nd:GdVO4 crystals[J].Chinese Journal of Lasers,2005,32(7):924-926(in Chinese).

    [15]

    YANG H,ZHANG Y K.Thermal effect of end-pumped laser crystal with circular cross-section[J].Chinese Journal of Lasers,2010,37 (1):51-53(in Chinese).

    [16]

    HENRICH B,BEI G R.Self-starting Kerr-lens mode locking of a Nd:YAG laser[J].Optics Communication,1997,135(4/6):300-304.

    [17]

    YANG Y M,ZHOU R,GUO Zh,et al.Study on the end deformation of several LD end-pumped crystals[J].Laser Technology,2006, 30(1):73-75(in Chinese).

    [18]

    LIU J H,LÜJ H,LU J R,et al.Mode matching in high-power laser-diode array end pumped Nd:YVO4 solid state lasers[J].Acta Optica Sinica,2000,20(2):186-189(in Chinese).

计量
  • 文章访问数:  6
  • HTML全文浏览量:  1
  • PDF下载量:  8
  • 被引次数: 0
出版历程
  • 收稿日期:  2011-12-21
  • 修回日期:  2012-01-03
  • 发布日期:  2012-09-24

目录

    /

    返回文章
    返回