A double clad Yb-doped fiber in a new refractive index profile

PAN Zhi-yong; REN Jun-jiang; HUANG Jian-ping; HE Yao-ji; GU Shao-yi; XING Mei-shu

doi:10.3969/j.issn.1001-3806.2009.05.033

In order to increase output power of a single fiber amplifier,a double clad Yb-doped fiber in a new refractive index profile was designed with a core diameter of 30μm and a cladding diameter of 125μm.The fiber,prepared with modified chemical vapor deposition(MCVD)process and improved high temperature vapor deposition,has a hollow refractive index profile with lower refractive index in the doped area.The fluorescence,mode field and amplification characteristics of the fiber were tested.The test results show that the pump power can be absorbed effectively and fluorescent spectrum curve becomes smooth for this new kind fiber.It is realized that smooth mode field energy can output by bending the fiber.40dB high power fs signal light was amplified in a 5m fiber with output power up to 30kW.

A double clad Yb-doped fiber in a new refractive index profile

1. The 23rd Research Institute, China Electronics Technology Group Corporation, Shanghai 200437, China

Received Date: 2008-11-08

Accepted Date: 2009-02-20

Available Online: 2009-10-25

Abstract: In order to increase output power of a single fiber amplifier,a double clad Yb-doped fiber in a new refractive index profile was designed with a core diameter of 30μm and a cladding diameter of 125μm.The fiber,prepared with modified chemical vapor deposition(MCVD)process and improved high temperature vapor deposition,has a hollow refractive index profile with lower refractive index in the doped area.The fluorescence,mode field and amplification characteristics of the fiber were tested.The test results show that the pump power can be absorbed effectively and fluorescent spectrum curve becomes smooth for this new kind fiber.It is realized that smooth mode field energy can output by bending the fiber.40dB high power fs signal light was amplified in a 5m fiber with output power up to 30kW.

HTML

Reference (8)

[1]	FERMANN M E.Single mode excitation of multimode fibers with ultrashort pulse[J].Opt Lett,1998,23(1):52-56.
[2]	GHATAK A K,GOYAL I C,JINDAL R.Design of waveguide refractive index profile to obtain flat modal field[J].SPIE,1998,3666:40-44.
[3]	DAWSON J W,BEACH R J,JOVANOVIC I,et al.Large flattened mode optical fiber for reduction of nonlinear effects in optical fiber lasers[J].SPIE,2004,5335:132-135.
[4]	ZHAO Ch J,PENG R W,TANG Zh X,et al.Design and analysis of a kind of large flattened mode optical fiber[J].Chinese Physics,2006,15(7):1838-1842.
[5]	ZHAO Ch J,PENG R W,TANG Zh X,et al.Modal fields and bending loss analyses of three-layer large flattened mode fibers[J].Opt Commun,2006,266(1):175-180.
[6]	HOTOLEANU M,SöDERLUND M,HOFFMAN H J,et al.Coiling effects on high order mode suppression of a radially doped LMA fiber[J].SPIE,2007,5485:1247-1256.
[7]	POOLE S B,PAYNE D N,FERMANN M E.Fabrication of low-loss optical fibers containing rare-earth ions[J].Electron Lett,1985,21(17):737-738.
[8]	ZENTENOL.High-powerdouble-cladfiberlasers[J].Journal of Lightwave Technology,1993,11(9):1435-1446.

A double clad Yb-doped fiber in a new refractive index profile

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views