An octave spanning spectrum is generated in an taper via pulses from an ultrafast fiber laser. Using a previously developed tapering method, we construct a taper that has a zero-dispersion wavelength around . The low two-photon absorption of sulfide-based chalcogenide fiber allows for higher input powers than previous efforts in selenium-based chalcogenide tapered fibers. This higher power handling capability combined with input pulse chirp compensation allows an octave spanning spectrum to be generated directly from the taper using the unamplified laser output.
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