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We demonstrate a 2090-nm 1-ps MOPA based on a Tm, Ho-fiber laser seeder and a Ho:YAG regenerative amplifier delivering 1.25-mJ pulses at a repetition rate of 1 kHz as a prospective driver laser for mid-IR frequency conversion. The output energy and the repletion rate are currently limited by the available seeder energy.
Using only a short piece of gain fiber, a 570 MHz Yb-fiber oscillator was set up and mode-locked via NPE, assisted by spectral filtering. Tuning the filter enables changing both center wavelength or optical bandwidth.
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