Fabrication and characterization of tapered photonic crystal fiber for broadband 2 µm: four-wave mixing-based fibered OPCPA - Institut de Physique de Nice Accéder directement au contenu
Article Dans Une Revue Applied Physics B - Laser and Optics Année : 2023

Fabrication and characterization of tapered photonic crystal fiber for broadband 2 µm: four-wave mixing-based fibered OPCPA

Résumé

We present the simulation, fabrication, and characterization of large area microstructured fiber tapers which enables broadband phasematching conditions of the four wave-mixing process. These silica-based tapers are intended to serve as a nonlinear gain medium for intense and high average power Fiber Optical Parametric Chirped Pulse Amplifier emitting at 2 μm and strongly pumped at Yb wavelength. Different geometries (tapered/untapered, aspect ratio, etc.) are fabricated, analyzed and their broadening properties-key for supporting ultrashort pulses amplification-are compared and discussed. The characterization of nonlinear gain bandwidth of the tapers relies on a tunable source of stochastic pulses based on tunable amplified spontaneous emission in Yb-doped amplifiers. The strong overshoots of this source allows degenerate four-wave mixing process to occur thus generating broadband incoherent visible signal and mid-infrared idler waves at much lower average power than usually needed with coherent pumping. The idler centered around 1.85 m is broadened due to zerodispersion wavelength shift along the taper.
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Dates et versions

hal-04074716 , version 1 (19-04-2023)

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Sidi-Ely Ahmedou, Guillaume Walter, Jules Herbuvaux, Romain Dauliat, Sébastien Février, et al.. Fabrication and characterization of tapered photonic crystal fiber for broadband 2 µm: four-wave mixing-based fibered OPCPA. Applied Physics B - Laser and Optics, 2023, 129, ⟨10.1007/s00340-023-08012-z⟩. ⟨hal-04074716⟩
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