Kerr-lens mode-locked Cr:ZnS laser.

  title={Kerr-lens mode-locked Cr:ZnS laser.},
  author={Nikolai A Tolstik and Evgeni Sorokin and Irina T. Sorokina},
  journal={Optics letters},
  volume={38 3},
We report the soft-aperture Kerr-lens mode-locked Cr:ZnS laser, generating 550 mW of 69 fs nearly transform-limited pulses at 2.39 μm wavelength. The pulse energy reached 3.8 nJ at 145 MHz repetition rate, limited by the onset of double-pulsing. This corresponds to the shortest-pulse and highest-energy direct femtosecond laser source in the mid-infrared. Dispersion compensation was achieved by a single chirped mirror and a thin sapphire plate, making the laser design simple, compact and very… CONTINUE READING
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