Middle-IR frequency comb based on Cr:ZnS laser

Journal Article · 01 January 2019 · Optics Express

DOI: https://doi.org/10.1364/oe.27.035079 · OSTI ID:1803383

Vasilyev, Sergey  ^[1]; Smolski, Viktor  ^[2]; Peppers, Jeremy  ^[2]; Moskalev, Igor  ^[2]; Mirov, Mike  ^[2]; Barnakov, Yury ^[2]; Mirov, Sergey  ^[3]; Gapontsev, Valentin ^[4]

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1. IPG Photonics, Birmingham, AL (United States); OSTI
2. IPG Photonics, Birmingham, AL (United States)
3. IPG Photonics, Birmingham, AL (United States); Univ. of Alabama, Birmingham, AL (United States). Dept. of Physics
4. IPG Photonics, Oxford, MA (United States)

We report, to the best of our knowledge, the first fully referenced Cr:ZnS optical frequency comb. The comb features few cycle output pulses with 3.25 W average power at 80 MHz repetition rate, spectrum spanning 60 THz in the middle-IR range 1.79–2.86 µm, and a small footprint (0.1 m2 ), The spectral components used for the measurement of the comb’s carrier envelope offset frequency were obtained directly inside the polycrystalline Cr:ZnS laser medium via intrinsic nonlinear interferometry. Using this scheme we stabilized the offset frequency of the comb with the residual phase noise of 75 mrads.

• Research Organization: Univ. of Alabama, Birmingham, AL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: SC0018378
• OSTI ID: 1803383
• Journal Information: Optics Express, Journal Name: Optics Express Journal Issue: 24 Vol. 27; ISSN 1094-4087; ISSN OPEXFF
• Publisher: Optical Society of America (OSA)Copyright Statement
• Country of Publication: United States
• Language: English