Mechanism for stable,ultra-flat multiwavelength operation in erbium-doped fiber lasers employing intensity-dependent loss |
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| Authors: | Xinhuan Feng C Lu HY Tam PKA Wai DY Tang Bai-ou Guan |
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| Institution: | 1. Institute of Photonics Technology, Jinan University, Guangzhou, China;2. Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, China;3. Photonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;4. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore |
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| Abstract: | We study a mechanism to attain stable and ultra-flat multiwavelength oscillations in erbium-doped fiber lasers (EDFLs). The key concept is to introduce intensity-dependent loss (IDL) into the laser cavity, which can effectively suppress the mode competition in the homogeneously broadened gain medium and ensure a uniform power distribution over wavelengths via the gain-clamping effect. The technique was successfully demonstrated by employing a nonlinear optical loop mirror (NOLM) in erbium-doped fiber laser cavity. Based on the experimental results, further experimental investigation and theoretical analysis are carried out to show the effectiveness of the gain-clamping mechanism in realizing the multiwavelength operation of the EDFL. |
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