Single-frequency thulium-doped distributed-feedback fibre laser

Søren Agger, Jørn Hedegaard Povlsen, Poul Varming

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We have successfully demonstrated a single-frequency distributed-feedback (DFB) thulium-doped silica fiber laser emitting at a wavelength of 1735 nm. The laser cavity is less than 5 cm long and is formed by intracore UV-written Bragg gratings with a phase shift. The laser is pumped at 790 nm from a Ti:sapphire laser and has a threshold pump power of 59 mW. The laser has a maximum output power of 1 mW in a singlefrequency, single-polarization radiation mode and is tunable over a few nanometers. To the best of the authors’ knowledge, this is the first report of a single-frequency DFB fiber laser that uses thulium as the amplifying medium. The lasing wavelength is the longest demonstrated with DFB fiber lasers and yet is among the shortest obtained for thulium-doped silica fiber lasers.
Original languageEnglish
JournalOptics Letters
Issue number13
Pages (from-to)1503-1505
Publication statusPublished - 2004

Cite this

Agger, S., Povlsen, J. H., & Varming, P. (2004). Single-frequency thulium-doped distributed-feedback fibre laser. Optics Letters, 29(13), 1503-1505.