Passively mode-locked fiber laser with kilohertz magnitude repetition rate and tunable pulse width |
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| Authors: | Fei Ai Zhigang Cao Xifen Zhang Chengmei Zhang Bo Zhang Benli Yu |
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| Institution: | 1. School of Electronic Engineering, Xi’an University of Posts & Telecommunications, Xi’an 710121, China;2. Key Laboratory of Physical Electronics and Devices of the Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China;1. Department of Engineering Science, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-shi, Tokyo 182-8585, Japan;2. Advanced ICT Research Institute, National Institute of Information and Communications Technology, 588-2 Iwaoka, Nishi-ku, Kobe, Hyogo 651-2492, Japan;1. Laboratoire Systèmes Electroniques et Réseaux de Communications (SERCOM), Ecole Polytechnique de Tunisie, EPT, B.P. 743, 2078, Université de Carthage, Tunisia;2. Laboratoire de Photonique d′Angers, EA 4464, UFR Sciences, Université d′Angers, 2 Boulevard Lavoisier, FR-49045 Angers Cedex 01, France;1. State University of Aerospace Instrumentation, Bolshaya Morskaya Str., 67, St.Petersburg, 190000, Russia;2. A.F.Ioffe Physical-Technical Institute, RAS, Politekhnicheskaya Str. 26, St.Petersburg, 194021, Russia;1. College of Electronic and Information Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Pingshan First Road, Shenzhen, Guangdong Province 518055, China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore |
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| Abstract: | We propose and demonstrate a strictly all-fiber, erbium doped passively mode-locked figure-eight fiber laser (EDFL). In the laser structure, we use the nonlinear optical loop mirror combination with a variable ratio coupler (VRC-NOLM) to achieve mode-locking. Due to the nonlinear effect in the nonlinear fiber, stable self-starting pulse is obtained. In order to reduce the repetition of pulse, a segment of nonlinear fiber (NLF) has been incorporated into the VRC-NOLM. The laser generates stable rectangular pulses with a low repetition rate (kilohertz magnitude) by extending the length of the cavity. Furthermore, the output pulse width of the fiber laser can be varied by changing the coupler ratio of the variable ratio coupler. |
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