Efficient coupling of a quantum cascade laser to a few-mode chalcogenide fiber | Zendy

Justin Cook | Zendy; Felix Tan | Zendy; Ahmed Al Halawany | Zendy; Alex Sincore | Zendy; Lawrence Shah | Zendy; Ayman F. Abouraddy | Zendy; Martin Richardson | Zendy; Kenneth L. Schepler | Zendy

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Efficient coupling of a quantum cascade laser to a few-mode chalcogenide fiber

Author(s) -

Justin Cook,

Felix Tan,

Ahmed Al Halawany,

Alex Sincore,

Lawrence Shah,

Ayman F. Abouraddy,

Martin Richardson,

Kenneth L. Schepler

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.027682

Subject(s) - materials science , optics , chalcogenide , multi mode optical fiber , photonic crystal fiber , optoelectronics , optical fiber , core (optical fiber) , plastic clad silica fiber , quantum cascade laser , fiber , laser , single mode optical fiber , fiber laser , plastic optical fiber , wavelength , terahertz radiation , physics , composite material

We report efficient coupling of a quantum cascade laser (QCL) into step-index chalcogenide fibers (As 2 S 3 ). Mechanically robust and low-loss chalcogenide fibers were fabricated using a hybrid, multi-material thermal drawing process. With suitable free-space optics, more than 160 mW of optical power was coupled into the fiber with predominantly single-mode excitation. Antireflection coatings on the fiber facets enabled 88.9% transmission with strong core confinement. By accurately tailoring the core diameter and antireflection-coating thickness, these fibers offer a versatile platform for high-power and low-loss transmission across the infrared spectrum. This work introduces an attractive alternative to the use of hollow-core fibers or multimode solid-core fibers for diffraction-limited infrared beam delivery.

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