期刊
OPTICS LETTERS
卷 40, 期 13, 页码 3181-3184出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.003181
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资金
- 111 Project [B14039]
- National Natural Science Foundation of China (NSFC) [61106045, 61290312]
- State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences [SKLST201302]
- PCSIRT [IRT1218]
- State Key Laboratory of Optoelectronic Materials and Technologies
An all-optical method to control the lasing modes of Er-doped random fiber lasers (RFLs) is proposed and demonstrated. In the RFL, an Er-doped fiber (EDF) recoded with randomly separated fiber Bragg gratings (FBG) is used as the gain medium and randomly distributed reflectors, as well as the controllable element. By combining random feedback of the FBG array and Fresnel feedback of a cleaved fiber end, multi-mode coherent random lasing is obtained with a threshold of 14 mW and power efficiency of 14.4%. Moreover, a laterally-injected control light is used to induce local gain perturbation, providing additional gain for certain random resonance modes. As a result, active mode selection of the RFL is realized by changing locations of the laser cavity that is exposed to the control light. (C) 2015 Optical Society of America
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