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Structured-Core GeO _{2} -Doped Photonic-Crystal Fibers for Parametric and Supercontinuum Generation

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10 Author(s)
Alexis Labruyere ; XLIM Research Institute, University of Limoges, Limoges, France ; Philippe Leproux ; Vincent Couderc ; Vincent Tombelaine
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We demonstrate efficient broadband four-wave-mixing (FWM) generation at the particular frequency detuning of ~150 THz from a 1064-nm sub-nanosecond laser pump in innovative structured-core germanium-oxide (GeO2)-doped photonic crystal fibers (PCFs). Remarkably, the latter PCF has a small-diameter highly concentrated germanium rod in the core center that enables fine tuning of the FWM wavelengths. The generated anti-Stokes radiation at ~700 nm is subsequently used as secondary pump for generating a bright visible supercontinuum in the fundamental mode from 370 nm to beyond 1750 nm, when splicing the GeO2-doped PCF to a pure-silica PCF, whose zero-dispersion wavelength is set in-between the pump and anti-Stokes wavelengths, consistently with the standard dual-wavelength pumping scheme.

Published in:

IEEE Photonics Technology Letters  (Volume:22 ,  Issue: 16 )