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Title10-W-level monolithic dysprosium-doped fiber laser at 3.24  μm.
Publication TypeJournal Article
Year of Publication2019
AuthorsFortin, Vincent, Frédéric Jobin, Maxence Larose, Martin Bernier, and Réal Vallée
JournalOpt Lett
Date Published2019 Feb 01

We report, to the best of our knowledge, the first entirely monolithic dysprosium (Dy)-doped fluoride fiber laser operating in the mid-IR region. The system delivers 10.1 W at 3.24 μm in continuous operation, a record for fiber oscillators in this range of wavelengths. The Dy fiber is pumped in-band using an erbium-doped fiber laser at 2.83 μm made in-house and connected through a fusion splice. Two fiber Bragg gratings directly written in the Dy-doped fiber form the 3.24 μm laser cavity to provide a spectrally controlled laser output. This substantial increase of output power in the 3.0-3.3 μm spectral range could open new possibilities for applications in spectroscopy and advanced manufacturing.

Alternate JournalOpt Lett
PubMed ID30702661