Tunable dual-wavelength ring fiber laser with stable output based on saturable absorber and thin core passive fiber |
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| Institution: | 1. Beijing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University, Beijing 100192, China;2. School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China;1. School of Information Engineering, Hebei University of Technology, Tianjin 300401, China;2. Department of Electronic Science and Technology, Huaqiao University, Xiamen, Fujian 361021, China;1. Department of Computer Science, Klabat University, Manado 95371, Indonesia;2. Department of Computer Science and Engineering, Yuan-Ze University, Chung-Li 32003, Taiwan;1. Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne, 9 avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France;2. FEMTO-ST/Optics department, UMR 6174 CNRS-University of Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France;3. Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Brescia, via Branze 38, 25123 Brescia, Italy;1. Universitat Politecnica de Catalunya (UPC), Jordi Girona 1, UPC-TSC-D5, 08034 Barcelona, Spain;2. France Telecom Orange, Lannion, France;3. Tellabs, Espoo, Finland;4. Intracom Networks, Athens, Greece;5. Instituto de Telecomunicacoes, Universidade Aveiro, Aveiro, Portugal;6. ISCOM, Rome, Italy;7. Athens Information Technology Center (AIT), Athens, Greece;1. School of Information and Electric Engineering, Hebei University of Engineering, Handan 056038, China;2. Optical Zeitgeist Laboratory, INRS, Montreal, QC H5A1K6, Canada |
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| Abstract: | A dual-wavelength erbium-doped ring fiber laser is proposed and experimentally demonstrated though a detailed theoretical analysis and experimental verification. The proposed dual-wavelength erbium-doped fiber (EDF) laser, which is based on a ring fiber laser structure, is fabricated using two fiber Bragg gratings. By adjusting the gains and losses of the fiber laser structure, the laser can be switched between single- and double-wavelength modes. A saturable absorber (SA) is used to improve the output laser stability, which is further enhanced by splicing a thin core passive fiber (TCPF) into the laser cavity to produce a Mach–Zehnder filter effect. Optimizing the lengths of the SA and TCPF results in the adoption of a 1-m EDF and a 4-m passive fiber. On the basis of these enhancements and optimizations, a fiber laser with stable output is constructed that incurs single- or dual-wavelength laser shifts of less than 3 pm at room temperature over a period of 250 s. |
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| Keywords: | Dual-wavelength erbium-doped fiber laser Tunable wavelength Saturable absorber Thin core passive fiber |
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