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Tunable single-longitudinal-mode erbium-doped fiber laser employing a two-taper Mach-Zehnder interferometer filter and saturable absorber
ZHANG Zhao,CAO Zhigang #,SHUI Tao,JI Xiaochun,WANG Rui,YU Benli *
Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University,Hefei,230601
*Correspondence author
#Submitted by
Subject:
Funding: Specialized Research Fund for the Doctoral Program of Higher Education（No.Grant no. 20093401110002)）
Opened online:12 March 2013
Accepted by: none
Citation: ZHANG Zhao,CAO Zhigang,SHUI Tao.Tunable single-longitudinal-mode erbium-doped fiber laser employing a two-taper Mach-Zehnder interferometer filter and saturable absorber[OL]. [12 March 2013] http://en.paper.edu.cn/en_releasepaper/content/4524719
 
 
In this paper，we propose and demonstrate a tunable and stable single-longitudinal-mode (SLM) erbium fiber laser with 1.4 kHz linewidth. A two-taper Mach-Zehnder interferometer filter as a wavelength -selective component and 5-meter-long unpumped erbium-doped fiber (EDF) as a saturable absorber(SA) are used in the cavity. By adjusting the curvature of two-taper, the center wavelength of the laser can be tuned from 1545.4 nm to 1561.9 nm. The maximum optical signal to noise ratios（OSNR）is 40 dB and the power variation is less than 0.06 dB in one hour under room temperature.
Keywords:tunable; single-longitudinal-mode; taper; saturable absorber
 
 
 

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