In this work we present cost effective all-fiber high power pump laser near 1530 nm. The laser was based on the novel Er-doped fiber with core/cladding diameter of 100/125 μm and optimized core composition. Exploiting of this fiber together with original laser scheme allowed us to reach wall-plug efficiency as high as ~17.5 % and, at the same time, provide robust wavelength-stabilized operation. Developed laser was tested as a pump source for single-mode Tefloncoated double-clad Er-doped fiber at 1585 nm. Slope efficiency of 45 % was demonstrated in MOPA configuration
L. V. Kotov, O. I. Medvedkov, M. M. Bubnov, D. S. Lipatov, N. N. Vechkanov, A. N. Guryanov, and M. E. Likhachev, "High power pump source at 1535 nm based on multimode Er-doped fiber," Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 100831N (Presented at SPIE LASE: February 02, 2017; Published: 22 February 2017); https://doi.org/10.1117/12.2250992.
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