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Journal of Modern Optics Volume 64, 2017 - Issue 2
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Original Articles

A long cavity passive mode-locking fibre laser with the reflective non-linear optical loop mirror

Pinghe WangState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, P. R. China
,
Yibiao TangState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, P. R. China
,
Hanlin PengState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, P. R. China
,
Guohua ShiSuzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, ChinaCorrespondence[email protected]
,
Tiejun HeITS Research Center, Southeast University, Nanjing, China
,
Heping LiState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, P. R. China
&
Yong LiuState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, P. R. China
 show all
Pages 122-126 | Received 16 Feb 2016, Accepted 05 Jul 2016, Published online: 18 Jul 2016
 
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Abstract

In this paper, we report a long cavity passively mode-locked fibre laser. The proposed mode locker is a reflective long cavity non-linear optical loop mirror (NOLM) which consists of a 50:50 coupler and 2-km single-mode fibres. The laser achieves stable mode locking at a fundamental repetition rate of 100 kHz. The rectangular pulses operating in dissipative soliton resonance region is generated in the laser. The relationship between the pulse duration and the pump power is investigated in detail. When the pump power is 200 mW, the laser generates rectangular pulses at 1565.57 nm (central wavelength) with pulse duration of 81.5 ns. The single pulse energy as high as 33.34 nJ is obtained. The results show that the reflective NOLM is an efficient mode locker and useful for the generation of high energy pulse.

Acknowledgements:

The authors thank Dr. Handing Xia for useful suggestions and discussions.

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