Research efforts devoted to supercontinuum (SC) light sources in a fiber-format spanning the mid-infrared (mid-IR) molecular fingerprint region is currently undergoing a dramatic increase, particularly enforced by such demanding applications as biomolecular and environmental sensing. Among various glass compositions, chalcogenides have the highest non-linearity and the broadest transparency range extending further into the mid-IR where fluoride and tellurite glasses are no longer transparent [1]. Here we demonstrate SC generation in tapered suspended-core As2Se3 photonics crystal fibers pumped by a Cr2+:ZnSe ultrafast laser with a pulse duration of 35 fs, a repetition frequency of 170 MHz and an average power of 180 mW (30 kW peak power and 1 nJ pulse energy) at 2.4 μm, based on an improved design of that reported in Ref. [2]. The generated SC covers the spectral region from 1.4 to 4.2 μm.

Octave-spanning high-repetition-rate mid-IR supercontinuum for frequency comb synthesis

Wang Y.;Vicentini E.;Gambetta A.;Coluccelli N.;Svelto C.;Laporta P.;Galzerano G.
2019

Abstract

Research efforts devoted to supercontinuum (SC) light sources in a fiber-format spanning the mid-infrared (mid-IR) molecular fingerprint region is currently undergoing a dramatic increase, particularly enforced by such demanding applications as biomolecular and environmental sensing. Among various glass compositions, chalcogenides have the highest non-linearity and the broadest transparency range extending further into the mid-IR where fluoride and tellurite glasses are no longer transparent [1]. Here we demonstrate SC generation in tapered suspended-core As2Se3 photonics crystal fibers pumped by a Cr2+:ZnSe ultrafast laser with a pulse duration of 35 fs, a repetition frequency of 170 MHz and an average power of 180 mW (30 kW peak power and 1 nJ pulse energy) at 2.4 μm, based on an improved design of that reported in Ref. [2]. The generated SC covers the spectral region from 1.4 to 4.2 μm.
978-1-7281-0469-0
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1157554
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