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Broadband supercontinuum (SC) spanning more than an octave was obtained in tapered seven-core photonic crystal fibers (PCFs) upon pumping with a 150-fs mode-locked fiber laser. The appearance of the second zero dispersion wavelength in the tapered section of the PCF limited the solitons' self-frequency shift. The simulations and experiments suggested that the unique group velocity in the tapered section...
We report the broadband supercontinuum (SC) generation in a tapered seven-core photonic crystal fiber (PCF). The introducing of a section of taper waist dramatically alters the group velocity and making the SC flatter.
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