Wavelength-Tuning of Nanosecond Pulses in Er-Doped Fluoride Fibre Amplifier

Paulami Ray, Amit Yadav, Solenn Cozic, Franck Joulain, Thibaud Berthelot, Ulf Hinze, Samuel Poulain, Edik U. Rafailov, Nikolai B. Chichkov

Research output: Contribution to journalArticlepeer-review


We investigate the gain bandwidth and wavelength-tuning range of an erbium-doped fluoride fibre amplifier. The presented experimental setup consisted of a widely wavelength-tunable optical parametric oscillator (OPO), which was amplified in a single-stage Er-doped fluoride fibre amplifier. The OPO laser provided seed pulses with a pulse width of 5.2 ns and a repetition rate of 10 kHz. The fibre section consisted of 2.2 m of double-clad, single-mode fibre with a doping concentration of 7 mol%. Wavelength-tuning was analysed at gain values of up to 26 dB and amplified pulse energies of up to 37.4 μ J. Using this setup, we demonstrate continuous wavelength tuning of more than 100 nm, covering the wavelength range from 2712 nm to 2818 nm.
Original languageEnglish
Article number1553105
Number of pages5
JournalIEEE Photonics Journal
Issue number5
Early online date12 Sept 2022
Publication statusPublished - 1 Oct 2022

Bibliographical note

This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/

Funding: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant
agreement No 843801. This project has received funding from the Engineering
and Physical Sciences Research Council (EPSRC), Grant No. EP/R024898/1.


  • Erbium
  • Fibre laser
  • Fluoride fibre
  • Mid-infrared
  • Nanosecond


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