Dark pulses with tunable repetition rate emission from fiber ring laser |
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| Authors: | Lu-Yan Wang Wen-Cheng Xu Zhi-Chao Luo Wen-Jun Cao Ai-Ping Luo Jiang-Li Dong Hui-Yi Wang |
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| Institution: | 1. School of Science, Shanghai Institute of Technology, Shanghai 201418, China;2. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;3. School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China;1. Harbin Institute of Technology at Weihai, Department of Optoelectronics Science, Weihai 264209, China;2. Harbin Institute of Technology, The School of Astronautics, Harbin 150001, China;3. Harbin Institute of Technology at Weihai, Institute of Marine Optoelectronics Equipment, Weihai 264209, China;1. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China;2. BUAA-CCMU Advanced Innovation Center for Big Data-Based Precision Medicine, Interdisciplinary Innovation Institute of Medicine and Engineering, Beihang University, Beijing 100191, China;3. School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China;4. Key Laboratory of Big Data-Based Precision Medicine, Ministry of Industry and Information Technology, School of Medicine and Engineering, Beihang University, Beijing 100191, China;1. Center for Advanced Laser Technology, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin, 300401, China;2. Hebei Key Laboratory of Advanced Laser Technology and Equipment, Tianjin, 300401, China;3. Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Hong Kong, China;4. Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, Harbin Engineering University, Harbin, 150001, China;1. Center for Optics Research and Engineering, and Key Laboratory of Laser & Infrared System, Ministry of Education, Shandong University, Qingdao, Shandong 266237, China;2. School of Information Science and Engineering, and Shandong Provincial Key Laboratory of Laser Technology and Application, Shandong University, Qingdao, Shandong 266237, China |
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| Abstract: | We demonstrated the experimental observation of the dark pulses with tunable repetition rate from an erbium-doped fiber ring laser. A considerable length of high nonlinear fiber is incorporated into the fiber ring laser to enhance the nonlinear intensity. In our experiment, both bright and dark pulses can be observed under the conditions of appropriately setting of the device in the cavity. Further study showed that the dark pulse is formed due to the cross coupling between two different lasing wavelengths. Particularly, dark pulse-train with multiple repetition rates was observed from the laser cavity and the repetition rate switchable operation can be realized by simply adjusting the polarization controller (PC) in the cavity. The operation of multiple repetition rates of dark pulses was further experimentally investigated and detected as a result of pulse splitting of each component with different wavelength. |
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