A linearly-polarized tunable Yb-doped fiber laser using a polarization dependent fiber loop mirror |
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| Authors: | Lei Zhang Jianhua Wang Xijia Gu Yan Feng |
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| Institution: | 1. Center for Space Laser and Information Technology, Shanghai Institute of Optics and fine Mechanics, Chinese Academy of Sciences, Qinghe Road 390, Jiading, Shanghai 201800, China;2. College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China;3. Department of Electrical and Computer Engineering, Ryerson University, 350 Victoria St., Toronto, Ontario, Canada M5B 2K3;1. College of Electronic and Electrical Engineering, Henan Normal University, Xinxiang, China;2. College of Physics and Material Science, Henan Normal University, Xinxiang, China;3. Key Laboratory Optoelectronic Sensing Integrated Application of Henan Province, Henan Normal University, Xinxiang, China;1. Electrical Engineering Department, Tehran South Branch, Tehran, Iran;2. Shahid Sattari University, Tehran, Iran;1. School of Computer and Communication Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin 300384, China;2. School of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin 300384, China;1. Center for Lasers and Photonics, IIT Kanpur, Kanpur 208016, India;2. Department of Electrical Engineering, IIT Kanpur, Kanpur 208016, India |
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| Abstract: | A Ytterbium-doped linearly-polarized fiber laser is constructed with a polarization maintaining fiber Sagnac loop mirror. The fiber loop mirror made of polarization maintaining fiber coupler has a polarization dependent reflectivity, which provides the necessary polarization discrimination between the slow and fast axes. With a fiber Bragg grating written in normal polarization maintaining fiber as an output coupler, laser output of up to 5.6 W at 1070 nm is generated with a polarization extinction ratio of > 20 dB and an overall efficiency of 55%. The broadband polarization dependent reflection of the fiber loop mirror offers advantages of easy spectral tuning and simple linearly-polarized laser generation. |
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