Multi-octave visible to long-wave IR femtosecond continuum generated in Cr:ZnS-GaSe tandem
- IPG Photonics, Birmingham, AL (United States). Southeast Technology Center
- Univ. of Central Florida, Orlando, FL (United States)
- IPG Photonics, Birmingham, AL (United States). Southeast Technology Center; Univ. of Alabama, Birmingham, AL (United States)
- IPG Photonics Corporation, Oxford, MA (United States)
We report a technique for generation of broad and coherent femtosecond (fs) continua that span several octaves from visible to long-wave IR parts of the spectrum (0.4–18 µm). The approach is based on simultaneous amplification of few-cycle pulses at 2.5 µm central wavelength at 80 MHz repetition rate, and augmentation of their spectrum via three-wave mixing in a tandem arrangement of polycrystalline Cr:ZnS and single crystal GaSe. The obtained average power levels include several mW in the 0.4–0.8 µm visible, 0.23 W in the 0.8–2 µm near-IR, up to 4 W in the 2–3 µm IR, and about 17 mW in the 3–18 µm long-wave IR bands, respectively. High brightness and mutual coherence of all parts of the continuum was confirmed by direct detections of the carrier envelope offset frequency of the master oscillator.
- Research Organization:
- Univ. of Alabama, Birmingham, AL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); US Department of the Navy, Office of Naval Research (ONR); Defense Advanced Research Projects Agency (DARPA); US Air Force Office of Scientific Research (AFOSR)
- Grant/Contract Number:
- SC0018378; N00014-15-1-2659; N00014-17-1-2705; W31P4Q-15-1-0008; FA9550-13-1-0234
- OSTI ID:
- 1515613
- Alternate ID(s):
- OSTI ID: 1612963
- Journal Information:
- Optics Express, Vol. 27, Issue 11; ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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