Journal
OPTICS AND LASER TECHNOLOGY
Volume 148, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2021.107750
Keywords
Femtosecond pulse; Optical parametric oscillator; Tunable repetition rate laser; Rod-type fiber laser; Harmonic mode locking; ANDi laser; Ytterbium-doped fiber
Categories
Funding
- French National Research Agency (ANR) [ANR-10-IDEX-03-02]
- Conseil Region Nouvelle-Aquitaine
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We report on a femtosecond-pulsed optical parametric oscillator (OPO) that is pumped by a large-mode-area, ytterbium-doped, rod-type fiber laser. By adjusting the pulse polarization inside the laser cavity, the OPO can deliver tunable femtosecond signal pulses at different repetition rates.
We report on an optical parametric oscillator (OPO) pumped by femtosecond pulses delivered by a large-modearea, ytterbium-doped, rod-type fiber laser. This femtosecond laser that is mode locked at harmonic repetition rates of 108 MHz, 216 MHz, and 324 MHz provides an average output power of more than 4.5 W and tens of nJ per pulse. The repetition rate is changed by adjusting the pulse polarization inside the laser cavity. Remarkably, at all these repetition rates and without any modification to the cavity, the OPO delivers femtosecond signal pulses that are tunable from 1450 nm to 1700 nm, with an average output power higher than 1 W. Increasing the pump power of the rod-type fiber and decreasing the transmission of the OPO output coupler, we were able to run the OPO at 540 MHz.
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