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

Sidi-Ely Ahmedou
  • Fonction : Auteur
Guillaume Walter
  • Fonction : Auteur
Jules Herbuvaux
  • Fonction : Auteur
Stéphane Petit
  • Fonction : Auteur
Constance Valentin
Denis Marion
  • Fonction : Auteur
Jérôme Lhermite
  • Fonction : Auteur
Guy Millot
  • Fonction : Auteur
Jean-Christophe Delagnes
  • Fonction : Auteur
  • PersonId : 1033797
  • IdRef : 103777423

Résumé

Abstract 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 $$\upmu \hbox {m}$$ μ m 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 $$\mu$$ μ m is broadened due to zero-dispersion wavelength shift along the taper.

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Dates et versions

hal-04074716 , version 2 (19-04-2023)
hal-04074716 , version 1 (05-12-2025)

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Sidi-Ely Ahmedou, Guillaume Walter, Jules Herbuvaux, Stéphane Petit, Constance Valentin, 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 (5), pp.69. ⟨10.1007/s00340-023-08012-z⟩. ⟨hal-04074716v1⟩
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