Semi-circumferential LD arrays symmetrically-pumped solid-state lasers

GUO Yun-xiao; GONG Ma-li; XUE Hai-zhong; ZHAI Gang; LI Chen; YAN Ping; LIU Qiang; CHEN Gang

To reduce the asymmetry of the output laser beam caused by the geometry of the conduct-cooled laser crystal in side pumped solid-state lasers,two pump modules were symmetrically placed and a semi-circumferentially mounted LD arrays were taken in each pump module.Numerical calculation and experiment were made,a maximum output power of 63.6mJ was gotten with 276mJ pump power at a frequency of 20Hz,the slope efficiency was 34%.Both numerical and experimental results prove the symmetrical geometry can effectively improve the beam quality and approximate symmetrical laser distribution can be obtained.

Corresponding author: GONG Ma-li, gongml@tsinghua.edu.cn;

1. Center for Photonics and Electronics, Department of Precision Instruments, Tsinghua University, Beijing 100084, China;

2. School of Technical Physics, Xidian University, Xi'an 710071, China;

3. Southwest Institute of Technical Physics, Chengdu 610041, China

Received Date: 2005-12-16

Accepted Date: 2006-01-09

Available Online: 2007-02-25

Abstract: To reduce the asymmetry of the output laser beam caused by the geometry of the conduct-cooled laser crystal in side pumped solid-state lasers,two pump modules were symmetrically placed and a semi-circumferentially mounted LD arrays were taken in each pump module.Numerical calculation and experiment were made,a maximum output power of 63.6mJ was gotten with 276mJ pump power at a frequency of 20Hz,the slope efficiency was 34%.Both numerical and experimental results prove the symmetrical geometry can effectively improve the beam quality and approximate symmetrical laser distribution can be obtained.

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Reference (8)

[1]	KOECHNER W.Solid-state laser engineering[M].5th ed,Berlin:Springer-Verlag,1999.312～315.
[2]	ZHOU B K,GAO Y Zh,CHEN T R et al.Laser theory[M].5th ed,Beijing:National Defense Industry Press,2000.273～274 (in Chinese).
[3]	FAN T Y,BYER R L.Diode laser-pumped solid-state lasers[J].IEEE J Q E,1988,24(6):895～912.
[4]	MAO Sh Q,HUANG T,WEN Zh Y et al.Calculation and analyze of homogeneity of diode side pumped solid laser[J].Laser Technology,1997,21 (3):185～188 (in Chinese).
[5]	KONDOW M,KITATANI T,NAKAHARA K et al.Temperature dependence of lasing wavelength in a GaInNAs laser diode[J].IEEE Photonics Technology Letters,2000,12 (7):777～779.
[6]	PANKOVE J.Temperature dependence of emission efficiency and lasing threshold in laser diodes[J].IEEE J Q E,1968,4 (4):119～122.
[7]	NEUENSCHWANDER B,WEBER R,WEBER H P.Determination of the thermal lens in solid-state lasers with stable cavities[J].IEEE J Q E,1995,31 (6):1082～1087.
[8]	NEUENSCHWANDER B,WEBER R,WEBER H P.Thermal lens and beam properties in multiple longitudinally diode laser pumped Nd:YAG slab lasers[J].IEEE J Q E,1996,32(3):365～370.

Semi-circumferential LD arrays symmetrically-pumped solid-state lasers

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References

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