Amplification of nanosecond pulses in a single-mode erbium-doped fluoride fibre amplifier

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

Research output: Contribution to journalArticlepeer-review


We investigate the amplification of nanosecond pulses in a single-mode Er-fluoride fibre amplifier. A PPLN-based optical parametric oscillator (OPO) with a Q-switched Nd:YAG pump laser was used to generate seed pulses at a wavelength of 2790 nm. The OPO system produced seed pulses with sub-10 ns pulse durations and pulse energies of 0.5 μJ at a repetition rate of 10 kHz. These seed pulses were amplified in a single-mode Erbium-fluoride fibre amplifier, consisting of 2.2 m of double-clad fibre with a doping concentration of 7 mol%. Using this setup, we demonstrate gain values of up to 20 dB, output pulse energies of 52.7 μJ, and peak powers of more than 8 kW.
Original languageEnglish
Pages (from-to)3-6
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number1
Early online date10 Jun 2022
Publication statusPublished - 1 Jan 2023

Bibliographical note

UKRI Rights Retention Statement: For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising

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-doped fiber lasers
  • Erbium-doped fibre
  • Fibre laser
  • Fluoride fibre
  • Mid-infrared
  • Nanosecond pulse
  • Optical fiber amplifiers
  • Optical fibers
  • Power amplifiers
  • Power generation
  • Power lasers
  • Pump lasers
  • ZBLAN fibre


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