75 W 40% efficiency single-mode all-fiber erbium-doped laser cladding pumped at 976 nm

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

Optimization of Yb-free Er-doped fiber for lasers and amplifiers cladding pumped at 976 nm was performed in this Letter. The single-mode fiber design includes an increased core diameter of 34 μm and properly chosen erbium and co-dopant concentrations. We demonstrate an all-fiber high power laser and power amplifier based on this fiber with the record slope efficiency of 40%. To the best of our knowledge, the achieved output power of 75 W is the highest power reported for such lasers.

Mots clés: Fibers; erbium; Laser amplifiers; Lasers; fiber

Domaines: Physique [physics]; Physique [physics]; Optique [physics.optics]

V. L. Kotov, M.E. Likhachev, Mikhail M. Bubnov, O. I. Medvedkov, M.V. Yashkov, et al.. 75 W 40% efficiency single-mode all-fiber erbium-doped laser cladding pumped at 976 nm. Optics Letters, 2013, pp.2230. ⟨10.1364/OL.38.002230⟩. ⟨hal-00925268⟩