@article{13373,
  keywords = {Atomic and Molecular Physics, and Optics},
  author = {W. Hettel and G. Golba and D. Morrill and D. Carlson and P. Chang and T.-H. Wu and S. Diddams and Henry Kapteyn and Margaret Murnane and M. Hemmer},
  title = {Compact, ultrastable, high repetition-rate 2 μm and 3 μm fiber laser for seeding mid-IR OPCPA},
  abstract = {<jats:p>We report a compact and reliable ultrafast fiber laser system optimized for seeding a high energy, 2 <jats:italic>μ</jats:italic>m pumped, 3 <jats:italic>μ</jats:italic>m wavelength optical parametric chirped pulse amplification to drive soft X-ray high harmonics. The system delivers 100 MHz narrowband 2 <jats:italic>μ</jats:italic>m pulses with &gt;1 nJ energy, synchronized with ultra-broadband optical pulses with a ∼1 <jats:italic>μ</jats:italic>m FWHM spectrum centered at 3 <jats:italic>μ</jats:italic>m with 39 pJ pulse energy. The 2 <jats:italic>μ</jats:italic>m and 3 <jats:italic>μ</jats:italic>m pulses are derived from a single 1.5 <jats:italic>μ</jats:italic>m fiber oscillator, fully fiber integrated with free-space downconversion for the 3 <jats:italic>μ</jats:italic>m. The system operates hands-off with power instabilities &lt;0.2% over extended periods of time.</jats:p>},
  year = {2024},
  journal = {Optics Express},
  volume = {32},
  pages = {4072},
  month = {2024-01},
  publisher = {Optica Publishing Group},
  issn = {1094-4087},
  doi = {10.1364/oe.508127},
}