White light supercontinuum generation in a Y-shaped microstructured tapered fiber pumped at 1064 nm

We report the generation of supercontinuum in a Ge-doped Y-shape tapered fiber pumped at 1064 nm in the ns pump regime. The taper was designed to have long taper transitions and a taper waist with a core diameter of 0.9 mum. The large air-filling fraction and diameter of the air-hole microstructure...

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Bibliographic Details
Published in:Optics express 2010-07, Vol.18 (14), p.14535-14540
Main Authors: Cascante-Vindas, J, Díez, A, Cruz, J L, Andrés, M V
Format: Article
Language:English
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Summary:We report the generation of supercontinuum in a Ge-doped Y-shape tapered fiber pumped at 1064 nm in the ns pump regime. The taper was designed to have long taper transitions and a taper waist with a core diameter of 0.9 mum. The large air-filling fraction and diameter of the air-hole microstructure reduces the confinement loss at long wavelengths so, enabling the extension of the spectrum to longer wavelengths. Along the taper transition the zero-dispersion wavelength decreases as the diameter of the taper becomes smaller. The spectral components generated along the taper transition pump the taper waist, enhancing the generation of short wavelengths. A flat spectrum spanning from 420 nm to 1850 nm is reported.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.18.014535