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A more than one-octave-wide supercontinuum (0.9 to ∼2.1 µm) is generated in a double-nanospike As2Se3-silica step-index waveguide. The average supercontinuum spectral intensity is increased by ∼20 dB compared to the previously reported single-spike structure.
Supercontinuum generation in CMOS compatible hydrogenated amorphous silicon waveguides with femtosecond pulses at telecommunication wavelengths is experimentally studied. It is shown that stable 540 nm broad supercontinua can be obtained in 1 cm-long waveguides.
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