Fourth-order cascaded Raman shift in AsSe chalcogenide suspended-core fiber pumped at 2 μm.


Cascaded Raman wavelength shifting up to the fourth order ranging from 2092 to 2450 nm is demonstrated using a nanosecond pump at 1995 nm in a low-loss As(38)Se(62) suspended-core microstructured fiber. These four Stokes shifts are obtained with a low peak power of 11 W, and only 3 W are required to obtain three shifts. The Raman gain coefficient for the… (More)
DOI: 10.1364/OL.36.002859

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