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4 March 2022 Wavelength tuning of nanosecond pulses in Erbium-doped fluoride fibre amplifier
Paulami Ray, Nikolai Chichkov, Solenn Cozic, Amit Yadav, Franck Joulain, Ulf Hinze, Samuel Poulain, Edik Rafailov
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Proceedings Volume PC11981, Fiber Lasers XIX: Technology and Systems; PC119810K (2022) https://doi.org/10.1117/12.2609553
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
We investigate the amplification of mid-infrared nanosecond laser pulses in a single-mode Er-doped fluoride fibre amplifier. The seed laser pulses in the wavelength range around 2790 nm are generated in a wavelength-tuneable, PPLN-based OPO, with sub-10 ns pulse durations and pulse energies of few 100 nJ at a repetition rate of 10 kHz. The single-stage fibre amplifier consists of a double-clad, single-mode Er-doped fluoride fibre with a doping concentration of 70000 ppm, pumped at 980 nm in counter-propagation to the laser signal. The sub-10 ns laser pulses are amplified to pulse energies above 35 µJ, resulting in gain values of more than 20 dB and peak powers above 5 kW. The gain bandwidth and wavelength range of the fibre amplifier are investigated at different gain values and wavelength tuning is demonstrated over the range from 2711 nm to 2818 nm.
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Paulami Ray, Nikolai Chichkov, Solenn Cozic, Amit Yadav, Franck Joulain, Ulf Hinze, Samuel Poulain, and Edik Rafailov "Wavelength tuning of nanosecond pulses in Erbium-doped fluoride fibre amplifier", Proc. SPIE PC11981, Fiber Lasers XIX: Technology and Systems, PC119810K (4 March 2022); https://doi.org/10.1117/12.2609553
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KEYWORDS
Fiber amplifiers
Wavelength tuning
Pulsed laser operation
Doping
Mid-IR
Optical amplifiers
Optical parametric oscillators
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