Analytical expressions to the pump and laser power as SRS threshold in double-clad fiber lasers

XU Qing-chao; LIU Ji-peng; CHEN Jian-guo; ZHOU Ding-fu; YANG Ze-hou

Double-clad scheme has provided an effective solution to take use of high power semiconductor lasers(or laser arrays) as the pump source.However,with the increase of the fiber laser power,stimulated Raman scattering may reach its threshold and finally limit the further increase of the fiber laser powers.After adopting justified approximation,it was analytically solved.The rate equation of the double-clad fiber lasers without the spontaneous emission terms,and expressions for the fiber laser power and pump power were derived when the Stokes radiation inside fiber reached its threshold.Based on these expressions,dependence of the threshold on the fiber laser parameters were studied.

Corresponding author: CHEN Jian-guo, optics_lab@163.com;

1. School of Opto-Electronics Science & Technology, Sichuan University, Chengdu 610064, China;

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

Received Date: 2006-11-02

Accepted Date: 2006-12-11

Available Online: 2008-02-25

Abstract: Double-clad scheme has provided an effective solution to take use of high power semiconductor lasers(or laser arrays) as the pump source.However,with the increase of the fiber laser power,stimulated Raman scattering may reach its threshold and finally limit the further increase of the fiber laser powers.After adopting justified approximation,it was analytically solved.The rate equation of the double-clad fiber lasers without the spontaneous emission terms,and expressions for the fiber laser power and pump power were derived when the Stokes radiation inside fiber reached its threshold.Based on these expressions,dependence of the threshold on the fiber laser parameters were studied.

HTML

Reference (10)

[1]	CHEN X,SUI Zh,CHEN Sh,et al.Stimulated aman cattering n igh ower ouble-clad fiber laser [J].Chinese ournal of Lasers,2006,33(3):298-302(in Chinese).
[2]	IDO,AMOS.Optimization ftrongly pumped lasers [J].IEEE Joumal of Lightwave Technology,1999,17(5):891-897.
[3]	HU J,SHANG h,DENG Y,et al.Threshold haracteristics finear avity Yb3+ -doped double-clad fiber laser [J].Optics Laser echnol,2004,37(7):3-7.
[4]	ZENG F,XIAO H.The development of Yb-doped double-clad fiber laser and its application [J].Laser Technology,2006,30(4):438-441(in hinese).
[5]	WANG,XU Ch,Q,POH.Analysis of Raman and thermal effects in kilowatt fiber lasers [J].OptCommun,2004,242:487-502.
[6]	ZHANG P,DUAN Zh Ch,CHEN JG,get l.Analytical solution of the threshold pump power of double-clad fiber lasers [J].Opto-electronic ngineering,2006,33(11):101-104(in hinese).
[7]	DUAN Zh Ch,CHEN JG,ZHANG l,P,et al.On the question of analytically solving rate equations of a double-clad fiber laser [J].Laser Technology,2007,31(3):274-276(in Chinese).
[8]	XIAO M,YAN,GONG M L,et al.An approximate analytic solution of strongly pumpYb-doped double-clad fiber lasers with out neglecting the scattering loss [J].OptCommun,2004,230:401-410.
[9]	VAUDELLE F.Experimental study of the laser and stimulated Raman scattering wave phases by a nonlinear imaging ,method [J].Opt Commun,1998,149:84-88.
[10]	ZHANG D Y,GONG JM,LIJD.Aeffects of loss to output characteristics of Yb3+-doped double-clad fiber lasers [J].Laser Journal,2005,26(3):13-14(in Chinese).

Analytical expressions to the pump and laser power as SRS threshold in double-clad fiber lasers

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views