Characteristic analysis of gain guided index antiguided large-mode-area fiber lasers

YU Xiao-qiu; LI Ming-zhong; WANG Jian-jun; GENG Yuan-chao; XU Dang-peng; LIN Hong-huan; ZHANG Rui; HUANG Xiao-dong

doi:10.3969/j.issn.1001-3806.2011.01.008

In order to study the power distribution and output characteristics of gain guided index antiguided (GG-IAG) fiber lasers, rate equations of basic model light of double-clad GG-IAG fiber lasers with end-pumping were established, based on the principle and structure characteristics of GG-IAG fibers. After solving the rate equations with tangential method and Runge-Kutta method, power distribution and output characteristics of basic model light were gained. The results show that parameters of fiber and laser cavity, such as fiber length, output lens reflectivity, have significant influence on gain distribution and output power of basic model light. When using a GG-IAG fiber with a radius of 100m, index step -0.00094 and concentration of ions 51026/m3 to construct a GG-IAG fiber laser, fiber length needs to be 3cm and output lens reflectivity is 0.98 and 0.3 respectively, in order to restrain LP11 model, and while inputing a 30W pump-light, 2.42W single-mode laser with large-mode-area can be obtained. The analysis shows that by optimally designing cavity mirror reflectivity and fiber length, fundamental mode output with certain efficiency can be obtained in a short length large-mode-area highly doped GG-IAG fiber.

Characteristic analysis of gain guided index antiguided large-mode-area fiber lasers

Corresponding author: LI Ming-zhong, limingzhong@sina.com;

1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;

2. Graduate School, China Academy of Engineering Physics, Mianyang 621900, China

Received Date: 2010-03-16

Accepted Date: 2010-06-08

Available Online: 2011-01-25

Abstract: In order to study the power distribution and output characteristics of gain guided index antiguided (GG-IAG) fiber lasers, rate equations of basic model light of double-clad GG-IAG fiber lasers with end-pumping were established, based on the principle and structure characteristics of GG-IAG fibers. After solving the rate equations with tangential method and Runge-Kutta method, power distribution and output characteristics of basic model light were gained. The results show that parameters of fiber and laser cavity, such as fiber length, output lens reflectivity, have significant influence on gain distribution and output power of basic model light. When using a GG-IAG fiber with a radius of 100m, index step -0.00094 and concentration of ions 51026/m3 to construct a GG-IAG fiber laser, fiber length needs to be 3cm and output lens reflectivity is 0.98 and 0.3 respectively, in order to restrain LP11 model, and while inputing a 30W pump-light, 2.42W single-mode laser with large-mode-area can be obtained. The analysis shows that by optimally designing cavity mirror reflectivity and fiber length, fundamental mode output with certain efficiency can be obtained in a short length large-mode-area highly doped GG-IAG fiber.

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Reference (9)

[1]	SUDESH V,McCOMB T,CHEN Y,et al.Diode-pumped 200m diameter core gain-guided,index-antiguided single mode fiber laser[J].Applied Physics,2008,B90(3):369-372.
[2]	SIEGMAN A E.Propagating modes in gain-guided optical fibers[J].Journal of the Optical Society of America,2003,A20(8):1617-1628.
[3]	SIEGMAN A E,CHEN Y,SUDESH V,et al.Confined propagation and near single-mode laser oscillation in a gain-guided,index antiguided optical fiber[J].Applied Physics Letters,2006,89(25):251101/1-251101/3.
[4]	CHEN Y,SUDESH V,McCOMB T,et al.Lasing in a gain-guided index antiguided fiber[J].Journal of the Optical Society of America,2007,B24(8):1683-1688.
[5]	CHEN Y,McCOMB T,SUDESH V,et al.Very large-core,single-mode,gain-guided,index-antiguided fiber lasers[J].Optics Letters,2007,32(17):2505-2508.
[6]	WANG W N,TAN X L,TIAN Zh,et al.Research on laser characteristics of gain-guided and index-antiguided fibers[J].Laser Technology,2009,33(5):503-505 (in Chinese).
[7]	WANG F R.Yb3+-doped double-clad fiber laser theory and experiment research[D].Mianyang:China Academy of Engineering Physics,2005:20-21 (in Chinese).
[8]	WANG X R,XIONG C D,QIU Q,et al.Analysis of Ytterbium-doped gain guided and index antiguided fiber amplifier[J].Proceedings of SPIE,2009,7278:72780C/1-72780C/6.
[9]	SIEGMAN A E.Gain-guided,index-antiguided fiber lasers[J].Journal of the Optical Society of America,2007,B24(8):1677-1682.

Characteristic analysis of gain guided index antiguided large-mode-area fiber lasers

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