Journal
OPTICS EXPRESS
Volume 24, Issue 11, Pages 2406-2413Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.012406
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Funding
- Research Council of Norway (NFR) [N219686, N255003]
- Austrian Science Foundation [P24916]
- Austrian Science Fund (FWF) [P24916] Funding Source: Austrian Science Fund (FWF)
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A more than 1.5 octave-spanning mid-infrared supercontinuum (1.2 to 3.6 mu m) is generated by pumping a As2S3-silica double-nanospike waveguide via a femtosecond Cr:ZnS laser at 2.35 mu m. The combination of the optimized group velocity dispersion and extremely high nonlinearity provided by the As2S3-silica hybrid waveguide enables a similar to 100 pJ level pump pulse energy threshold for octave-spanning spectral broadening at a repetition rate of 90 MHz. Numerical simulations show that the generated supercontinuum is highly coherent over the entire spanning wavelength range. The results are important for realization of a high repetition rate octave-spanning frequency comb in the mid-infrared spectral region. (C)2016 Optical Society of America
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