Controlling technique of beam quality by thermal lensing

Qu Pengfei; Wang Shiyu; Guo Zhen; Cai Defang; Li Bingbin

doi:10.5768/JAO201738.0107001

Journal of Applied Optics > 2017 > 38(1): 120-125. > DOI: 10.5768/JAO201738.0107001

Qu Pengfei, Wang Shiyu, Guo Zhen, Cai Defang, Li Bingbin. Controlling technique of beam quality by thermal lensing[J]. Journal of Applied Optics, 2017, 38(1): 120-125. DOI: 10.5768/JAO201738.0107001

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Controlling technique of beam quality by thermal lensing

School of Physics and Optoelectonic Engineering, Xidian University, Xi'an 710071, China

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Received Date: August 14, 2016
Revised Date: October 26, 2016

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Abstract

Abstract

Aiming at improving laser beam quality in designing high power end-pumped Nd:YAG laser, thermal lensing effect is employed to achieve high beam quality in Nd:YAG laserin this paper by placing two more Nd:YAG crystals with different doping concentrations in the resonator. Under action of pumping light, thermal lensing generated from the Nd:YAG crystal is used to shape special distribution of pump beam and fundamental mode beam. Tighter overlapping of both beams results in higher efficiency of pump power and better beam quality of laser. Experimental results show special distribution of pump beam and fundamental mode beam can be shaped by thermal lensing effectively under different pump power. Two beams are matched closely at pump power of 200 W, and M² is improved from 14.7 to 4.1.
- solid-state laser,
- thermal lensing,
- special distribution,
- M²

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[1]	Mirzaeian H, Manjooran S, Major A. Simple technique for accurate characterization of thermal lens in solid state lasers[J]. SPIE, 2014, 9288:928802-7. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=CC0214511662
[2]	Yu Shen, Yong Bo, Nan Zong, et al. Experimental and theoretical investigation of pump laser induced thermal damage for polycrystalline ceramic and crystal Nd:YAG[J]. IEEE Journal of Selected Topics in Quantum Electronics, 2015, 21(1):160-167. doi: 10.1109/JSTQE.2014.2351791
[3]	Sanghera J, Shaw W, Kim W. Ceramic laser materials[J]. Materials, 2012, 5:258-277. doi: 10.3390/ma5020258
[4]	Shibib K S, Minshid M A, Alattar N E.Thermal and stress analysis in Nd:YAG laser rod with different double end pumping methods[J]. Therm. Sci., 2011, 15(sup 2): 399-407. http://cn.bing.com/academic/profile?id=fe1002fce122743a7f720b0107906ca3&encoded=0&v=paper_preview&mkt=zh-cn
[5]	Shen Y, Liu W B, Zong N, et al. Comparison of laser induced thermal fracture between polycrystalline ceramic and crystal Nd:YAG[J]. Opt. Lett., 2014, 39(7): 1965-1967. doi: 10.1364/OL.39.001965
[6]	Safari E, Kachanov A. Estimation of thermal lensing effect in the high-power end-pumped direct-cut crystal lasers[J]. Optics & Laser Technology, 2006, 38(7): 534-539. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=023541eea7917c56b89135fa4c830124
[7]	史彭, 李隆, 甘安生, 等.端面抽运矩形截面Nd:GdVO4[J].中国激光, 2005, 32(7): 923-928. doi: 10.3321/j.issn:0258-7025.2005.07.012 Shi Peng, Li Long, Gan Ansheng et al. Thermal effect research of end-pumped rectangle Nd:GdVO4 crystals[J]. Chinese J. Lasers, 2005, 32(7):923-928. doi: 10.3321/j.issn:0258-7025.2005.07.012
[8]	张帅一, 黄春霞, 于果蕾, 等.激光二极管端面抽运激光晶体的热效应[J].中国激光, 2008, 35(3): 333-337. doi: 10.3321/j.issn:0258-7025.2008.03.003 Zhang Shuaiyi, Huang Chunxia, Yu Guolei, et al. Thermal effect of laser crystal by laser diode end-pumped[J]. Chinese J. Lasers, 2008, 35(3): 333-337. doi: 10.3321/j.issn:0258-7025.2008.03.003
[9]	Hodgson N, Hoffman H J, Valerh T M, et al.Diode-pumped, 220W ultra-thin slab Nd: YAG laser with near-diffraction limited beam quality[C]. US: IEEE, 2002: 264-265. https://www.osapublishing.org/abstract.cfm?URI=ASSL-2002-PD2
[10]	Yasuhara R, Kawashima T, Lkegawa T, et al. Diode-pumped thermally controlled zig-zag laser with 20J pulse energy in 10 ns at 10 Hz repetition rate[R]. Osaka: Osaka University, 2005:150-151. https://ieeexplore.ieee.org/document/1569377
[11]	Mende J, Speiser J, Spindler G, et al. Mode dynamics and thermal lens effects of thin disk lasers[J]. SPIE, 2008, 6871:1-11. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=CC024893195
[12]	宋小鹿, 过振, 李兵斌, 等.散热方式对激光晶体热畸变效应的影响[J].中国激光, 2009, 37(2): 351-357. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgjg201002005 Song Xiaolu, Guo Zhen, Li Bingbin, et al. Influences of heat-dissipation methods on thermal distortion of laser rods[J]. Chinese J. Lasers, 2009, 37(2): 351-357. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgjg201002005
[13]	余锦, 谭慧明, 钱龙生, 等.纵向泵浦固体激光介质热透镜效应的理论研究[J].强激光与粒子束, 2000, 12(1): 27-31. http://d.old.wanfangdata.com.cn/Periodical/qjgylzs200001008 Yu Jin, Tan Huiming, Qian Longsheng, et al. Theoretical study on thermal beam fousing in longitudinally-pumped solid-state laser rods[J]. High Power Laser and Particul Beams, 2000, 12(1): 27-31. http://d.old.wanfangdata.com.cn/Periodical/qjgylzs200001008
[14]	宦友文.泵浦光分布对振荡光分布特性的研究[D].西安: 西安电子科技大学, 2013: 28-36. http://cdmd.cnki.com.cn/Article/CDMD-10701-1013295466.htm Huan Youwen. Study on the effect of pump light distribution to the oscillating light distribution characteristics[D]. Xi'an: Xidian University, 2013: 28-36. http://cdmd.cnki.com.cn/Article/CDMD-10701-1013295466.htm

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Controlling technique of beam quality by thermal lensing