6 October 2010 Stable output of fiber laser with complex ring cavities
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Proceedings Volume 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 765515 (2010) https://doi.org/10.1117/12.863730
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China
Abstract
A stable single-longitudinal-mode erbium-doped fiber laser (EDFL) with complex cavity has been proposed, It consists of main ring cavity, secondary cavity and fiber loop mirror, In this laser, The main ring cavity consists of 980nm laser, erbium-doped fiber, isolater(ISO), wavelength division multiplexer(WDM) and FBG,ISO ensures light field transmitting uniaxially to avoid hole burning in the main ring cavity, an unpumped Er-doped fiber is served as a saturable absorber to suppress Multi-longitudinal-mode, and a fiber ring resonator filter is used to suppress the beating noise.The secondary cavity consists of two Single-mode fiber with different length, and the secondary cavity is joined the main ring cavity by coupler.The Longitudinal mode of complex cavities erbium-doped fiber laser is selected from main ring cavity and secondary cavity, This structure not only play a role in mode selection, and could inhibit the beat frequency.With a fiber Bragg grating (FBG) as a selective wavelength component, single mode output without beating noise is obtained experimentally.The main wavelength is 1550.24nm and the side-mode suppression ration (SMSR) is beyond 50dB , The output power of EDFL is 20.51mW when pumping power is 80 mW , the laser output is stable, the output power fluctuation is less than 0.02% in 25min, EDFL with stabilized single-longitudinal mode is achieved.
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Tianshan Liu, Peiqi Han, Xincun Gao, "Stable output of fiber laser with complex ring cavities", Proc. SPIE 7655, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 765515 (6 October 2010); doi: 10.1117/12.863730; https://doi.org/10.1117/12.863730
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