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Opt Lett. 2012 Nov 1;37(21):4362-4. doi: 10.1364/OL.37.004362.

Generation of a phase-locked Raman frequency comb in gas-filled hollow-core photonic crystal fiber.

Author information

1
Max Planck Institute for the Science of Light, Erlangen, Germany. amir.abdolvand@mpl.mpg.de

Abstract

In a relatively simple setup consisting of a microchip laser as pump source and two hydrogen-filled hollow-core photonic crystal fibers, a broad, phase-locked, purely rotational frequency comb is generated. This is achieved by producing a clean first Stokes seed pulse in a narrowband guiding photonic bandgap fiber via stimulated Raman scattering and then driving the same Raman transition resonantly with a pump and Stokes fields in a second broadband guiding kagomé-style fiber. Using a spectral interferometric technique based on sum frequency generation, we show that the comb components are phase locked.

PMID:
23114296

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