Evolution of modes in double-clad Raman fiber amplifier |
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Authors: | Wang Wen-Liang Huang Liang-Jin Leng Jin-Yong Guo Shao-Feng Jiang Zong-Fu |
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Affiliation: | College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract: | Stimulated Raman scattering in a double cladding optical fiber is studied with a continuous wave laser used as a pump source. Under various launch conditions, pump modes are differently excited. Considering the mode coupling effect among the pump modes, the evolution of the power in the Stokes modes is studied. The results show that the scattered waves (the Stokes waves) in the fiber core with 9-μm diameter and 0.14 NA could propagate predominantly in the fundamental mode of the fiber by carefully adjusting the pump light launching conditions. |
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Keywords: | fiber nonlinear optics high power Raman fiber amplifier fiber mode |
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