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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.
We report on a compact coherent all-PM fiber laser amplifier system at around 2.05 µm running at 100 MHz delivering broadband pulses at 290 mW average power and pulse duration down to 128 fs.
In the last decade, laser development based on Tm and Ho doped materials in the mid-IR has made a significant progress, especially in fiber technology [1-2]. Current work focusses on Tm doped fiber broadband amplifiers at the central wavelength toward 1.95 μm with high average power and pulse duration of 141 fs [3]. Whereas purely Tm doped fibers are well suited for a center wavelength in the 1.9–2...
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.
Ultrahigh axial resolution OCT and enhanced penetration in highly scattering media is demonstrated with two fiber broadened femtosecond light sources, operating in the visible and in the near infrared in human cells and other human biopsies.
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