Yb-free Er-doped all-fiber amplifier cladding-pumped at 976 nm with output power in excess of 100 W

V. L. Kotov (1, 2) , M.E. Likhachev (1) , Mikhail M. Bubnov (1) , O. I. Medvedkov , M.V. Yashkov (3) , Aleksei N. Guryanov (4) , Sébastien Février (2) , Jérôme Lhermite (5) , Eric Cormier (5)

1 FORC - Fiber Optics Research Center of the Russian Academy of Sciences
2 XLIM-PHOT - Photonique Fibre et Sources Cohérentes
3 Institute of Chemistry of High Purity Substances
4 Institute of Chemistry of High Purity Substances of RAS
5 CELIA - Centre d'Etudes Lasers Intenses et Applications

In this paper we present results on power scaling of Er-doped fiber amplifier pumped by multimode diodes at 976 nm. Using an optimized active fiber design including a 34 μm single-mode core with proper Er3+ and co-dopant concentrations we obtained an output power of 103 W at 1585 nm for a pump conversion efficiency of 37 % in an amplifier scheme. To the best of our knowledge the output power is the highest power ever reported for Er-doped fiber lasers pumped at 976 nm

Domaines: Optique [physics.optics]

V. L. Kotov, M.E. Likhachev, Mikhail M. Bubnov, O. I. Medvedkov, M.V. Yashkov, et al.. Yb-free Er-doped all-fiber amplifier cladding-pumped at 976 nm with output power in excess of 100 W. Photonics West, Feb 2014, San Francisco, United States. Paper 8961-56. ⟨hal-00925348⟩