Building upon recent advances in GaSb-based diode lasers and Er-doped fluoride fibre technologies, this article demonstrates for the first time the fibre-based amplification of mid-infrared diode lasers in the wavelength range around 2.78 μm. The laser setup consists of a GaSb-based diode laser and a single-stage Er-doped fibre amplifier. Amplification is investigated for continuous wave (CW) and ns-pulsed input signals, generated by gain-modulation of the GaSb-based seed lasers. The experimental results include the demonstration of output powers up to 0.9 W, pulse durations as short as 20 ns, and pulse repetition rates up to 1 MHz. Additionally, the amplification of commercial and custom-made GaSb-based seed lasers is compared and the impact of different fibre end-cap materials on laser performance is analysed.
|Number of pages||7|
|Journal||IEEE Photonics Journal|
|Early online date||19 Jan 2023|
|Publication status||Published - Feb 2023|
Bibliographical noteThis work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.
Funding: This work was supported in part by Marie Skłodowska-Curie through European Union’s Horizon 2020 Research and Innovation Programme under Grant 843801 and in part by Engineering and Physical Sciences Research Council (EPSRC) under Grant EP/R024898/1.
- Diode lasers
- Fibre laser
- Fluoride fibre
- GaSb diode laser
- Gas lasers
- Laser beams
- Power generation
- Power lasers
- Pump lasers
- Semiconductor laser
- Semiconductor lasers