Transient Bragg fiber gratings formed by unpumped thulium doped fiber

doi:10.1007/s12200-013-0312-3

Front Optoelec

2013, Vol. 6

Issue (2) : 180-184 https://doi.org/10.1007/s12200-013-0312-3

RESEARCH ARTICLE

Transient Bragg fiber gratings formed by unpumped thulium doped fiber

Shui ZHAO¹, Ping LU^1,2(

), Li CHEN¹, Deming LIU^1,2, Jiangshan ZHANG³

1. National Engineering Laboratory for Next Generation Internet Access System, Huazhong University of Science and Technology, Wuhan 430074, China; 2. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China; 3. Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

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Abstract

A theoretical introduction of saturable absorber based on standing-wave saturation effects as a transient fiber Bragg grating (FBG) was presented. The central wavelength of the transient FBG was located in 2 μm. The factors affecting the bandwidth and the reflectivity of the transient FBG were analyzed. The linewidth and reflectivity as the function of doped fiber length and doping concentration were correspondingly simulated by Matlab software. It was found that the larger the doping concentration and the fiber length were, the smaller the bandwidth was. These results suggest that the performance of the transient FBG can be optimized by choosing the appropriate length of doped fiber and the larger doping concentration, which can be used as a reference for the narrow-linewidth fiber laser around 2 μm.

Keywords narrow-linewidth fiber laser saturable absorber thulium doped fiber (TDF)

Corresponding Author(s): LU Ping,Email:pluriver@mail.hust.edu.cn

Issue Date: 05 June 2013

Cite this article:

Shui ZHAO,Ping LU,Li CHEN, et al. Transient Bragg fiber gratings formed by unpumped thulium doped fiber[J]. Front Optoelec, 2013, 6(2): 180-184.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-013-0312-3
https://academic.hep.com.cn/foe/EN/Y2013/V6/I2/180

Fig.1 Reflection spectrum of FBG with different fiber length

Fig.2 Linewidth as a function of fiber length

Fig.3 Linewidth as a function of fiber length ()

Fig.4 Reflection spectrum of FBG with different

Fig.5 Reflectivity of FBG as a function of fiber length with different

Fig.6 Linewidth as a function of doping concentration

Fig.7 Length of saturable absorber (SA) as a function of power of pump light

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