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Article Dans Une Revue Optics Express Année : 2022

High power ytterbium rod-type fiber laser delivering tunable picosecond pulses.

Résumé

We designed an all-normal dispersion ytterbium rod-type fiber laser oscillator delivering picosecond pulses which are continuously tunable both in central wavelength and pulse duration. This system delivers self-mode-locked pulses with an average power up to 25 W. At a repetition rate of 78 MHz, it yields picosecond laser pulses, of which the central wavelength and pulse duration can be tuned between 1010 nm-1060 nm and 4.5 ps-1.8 ps, respectively. The tunability is obtained by adjusting the position and the width of a slit which acts as a spectral bandwidth filter, placed close to the center of a 4f-folded zero dispersion line inserted in the laser cavity. This oscillator delivers nearly Fourier limited pulses with at most a 1.2 time-bandwidth product. A numerical model accounts well for the behavior of this all-normal dispersion fiber oscillator.
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Dates et versions

hal-03829293 , version 1 (25-10-2022)

Identifiants

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Muhammad Ghawas, Valerian Freysz, Lukas Muller, Sébastien Cassagnère, Eric Freysz. High power ytterbium rod-type fiber laser delivering tunable picosecond pulses.. Optics Express, In press, ⟨10.1364/OE.476353⟩. ⟨hal-03829293⟩

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