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We report the fabrication of cascaded photonic crystal fiber (PCF) tapers in monolithic design. Flat broadband supercontinuum (SC) generation in cascaded PCF tapers pumped by sub-nanosecond pulses from a 1 064-nm microchip laser is demonstrated. The spectral width (20 dB) extends from 0.47 to 1.67 μm. In the optimal configuration, an ultraflat (3 dB) spectrum from 500 to 1 000 nm is achieved.
We report the fabrication of cascaded photonic crystal fiber (PCF) tapers in monolithic design. Flat broadband supercontinuum (SC) generation in cascaded PCF tapers pumped by sub-nanosecond pulses from a 1 064- dB) extends from 0.47 to 1.67 μm. In the optimal configuration, an ultraflat (3 dB) spectrum from 500 to 1 000 nm is achieved.