Experimental observation of lasering behavior in wavelength-switchable fiber laser with arrayed waveguide grating |
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Authors: | Hongjun Zheng Chongqing Wu Shanliang Liu Xin Li |
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Institution: | 1. Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Science, Beijing Jiaotong University, No. 3 Shang Yuan Cun, Hai Dian District Beijing, Beijing 100044, PR China;2. Institute of Optical Communication, Liaocheng University, Culture Road 34, Liaocheng, Shandong 252059, PR China |
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Abstract: | A simple and wavelength-switchable fiber laser consisting mainly of an Erbium-doped fiber amplifier (EDFA) which provides the optical gain and an 1 × 40 (1 input channel to 40 output channels) arrayed waveguide grating (AWG) that supports wavelength selection is reported. The lasering behavior in wavelength-switchable fiber laser is investigated experimentally. One can obtain wavelength-switchable single-longitudinal-mode (SLM) single wavelength laser with different wavelength by changing different channel of the AWG as the wavelength selection element. Lasering wavelength hopping in dual wavelength laser operation for low pump power is experimentally observed. The wavelength hopping and the output power of the laser is controlled by using a variable optical attenuator (VOA). The wavelength hopping operation is eliminated for high pump power. One can obtain switchable dual wavelength laser with different wavelength by selecting different two channels of the AWG. The output laser exhibits a good performance having a high sidemode suppression ratio (SMSR), narrow line-width and symmetrical spectrum. |
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