Optimum design of three-position-pumped high-power double-clad fiber lasers

OU Pan; YAN Ping; GONG Ma-li; ZHANG Chun-xi

Three-position-pumped double-clad fiber lasers are the simplest and essential forms of multi-position-pumped ones with side-pump technologies.In order to obtain higher laser output power under the same pump powers,the optimization of the pump parameters was studied.Firstly,the rate equations of Yb-doped double-clad fiber lasers are applied to acquire the expression of total lost pump power.Secondly,the optimum design model,the analytical expression for choosing the optimum side-pumping position,was obtained based on the principle of minimal total lost pump power for the three-position-pumped double-clad fiber lasers.The simulation results showed that the output power of the optimized double-clad fiber lasers was higher than that of the original ones,especially for the double-clad fibers with large total lost pump powers.The optimization methods are valuable,from which the optimum design for multi-position-pumped double-clad fiber lasers can be derived.

1. School of Instrument and Photoelectric Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;

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

Received Date: 2005-12-19

Accepted Date: 2006-01-12

Available Online: 2007-02-25

Abstract: Three-position-pumped double-clad fiber lasers are the simplest and essential forms of multi-position-pumped ones with side-pump technologies.In order to obtain higher laser output power under the same pump powers,the optimization of the pump parameters was studied.Firstly,the rate equations of Yb-doped double-clad fiber lasers are applied to acquire the expression of total lost pump power.Secondly,the optimum design model,the analytical expression for choosing the optimum side-pumping position,was obtained based on the principle of minimal total lost pump power for the three-position-pumped double-clad fiber lasers.The simulation results showed that the output power of the optimized double-clad fiber lasers was higher than that of the original ones,especially for the double-clad fibers with large total lost pump powers.The optimization methods are valuable,from which the optimum design for multi-position-pumped double-clad fiber lasers can be derived.

HTML

Reference (8)

[1]	WEI W L,OU P,YAN P et al.Side-pumping coupler technology for double-clad fiber[J].Laser Technology,2004,28 (4):116～121 (in Chinese).
[2]	XU J Q,LU J H,KUMAR G et al.A non-fused fiber coupler for sidepumping of double-clad fiber lasers[J].Opt Commun,2003,220:389～395.
[3]	OU P,YAN P,WEI W L et al.Side-pumped Yb-doped doubLe-clad fiber laser[J].Acta Optica Sinica,2004,24 (9):1240～1244 (in Chinese).
[4]	OU P,YAN P,GONG M L et al.Coupling efficiency of angle-polished method for side-pumping technology[J].Opt Engng,2004,43 (4):816～821.
[5]	OU P,YAN P,GONG M L et al.Multi-coupler side-pumped Yb-doped double-clad fiber laser[J].Chinese Optics Letters,2004,2 (5):285～287.
[6]	OU P,YAN P,GONG M L et al.Studies of pump light leakage out of couplers for multi-coupler side-pumped Yb-doped double-clad fiber lasers[J].Opt Commun,2004,239:421～428.
[7]	KELSON I,HARDY A A.Strongly pumped fiber lasers[J].IEEE J Q E,1998,34(9):1570～1577.
[8]	YAN P,GONG M L,OU P et al.10W cladding-pumped fiber laser with single transverse mode output[J].Chinese Optics Letters,2003,1(6):332～333.

Optimum design of three-position-pumped high-power double-clad fiber lasers

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views