Stable single longitudinal mode erbium-doped silica fiber laser based on asymmetric linear three-cavity structure

doi:10.1088/1674-1056/22/1/014208

Abstract We present a stable linear-cavity single longitudinal mode (SLM) erbium-doped silica fiber laser. It consists of four fiber Bragg gratings (FBGs) directly written in a section of photosensitive erbium-doped fiber (EDF) to form asymmetric three-cavity structure. The stable SLM operation at a wavelength of 1545.112 nm with a 3-dB bandwidth of 0.012 nm and an optical signal-to-noise ratio (OSNR) of about 60 dB is verified experimentally. In laboratory condition, the performance of power fluctuation of less than 0.05 dB observed from the power meter for 6 h and wavelength variation of less than 0.01 nm obtained from the optical spectrum analyzer (OSA) for about 1.5 h are demonstrated. The gain fiber length is no longer limited to only several centimeters for SLM operation because of the excellent mode-selecting ability of the asymmetric three-cavity structure. The proposed scheme provides a simple and cost-effective approach to realizing a stable SLM fiber laser.

Keywords: asymmetric three-cavity structure single longitudinal mode erbium-doped fiber laser linear cavity

Received: 23 April 2012
Revised: 11 June 2012
Accepted manuscript online:

PACS:	42.55.Wd	(Fiber lasers)
	42.81.-i	(Fiber optics)
	42.60.-v	(Laser optical systems: design and operation)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61077069 and 61107094) and the Innovation Foundation for Excellent Doctoral Candidates of Beijing Jiaotong University, China (Grant No. 2011YJS202).

Corresponding Authors: Yan Feng-Ping
E-mail: fpyan@bjtu.edu.cn

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Feng Ting (冯亭), Yan Feng-Ping (延凤平), Li Qi (李琦), Peng Wan-Jing (彭万敬), Feng Su-Chun (冯素春), Tan Si-Yu (谭思宇), Wen Xiao-Dong (温晓东) Stable single longitudinal mode erbium-doped silica fiber laser based on asymmetric linear three-cavity structure 2013 Chin. Phys. B 22 014208

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Stable single longitudinal mode erbium-doped silica fiber laser based on asymmetric linear three-cavity structure

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