BaF2 Ridge Waveguide Operating at Mid-Infrared Wavelength

Yazhou Cheng; Yazhou Cheng; Xinbin Zhang; Hongxiao Song

doi:10.3389/fphy.2021.766905

Frontiers in Physics (Oct 2021)

BaF2 Ridge Waveguide Operating at Mid-Infrared Wavelength

Yazhou Cheng,
Yazhou Cheng,
Xinbin Zhang,
Hongxiao Song

Affiliations

Yazhou Cheng: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, China
Yazhou Cheng: Shenzhen Research Institute of Shandong University, Shenzhen, China
Xinbin Zhang: College of Physics, Center for Marine Observation and Communications, Qingdao University, Qingdao, China
Hongxiao Song: School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, China

DOI: https://doi.org/10.3389/fphy.2021.766905
Journal volume & issue: Vol. 9

Abstract

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We report on the fabrication of optical ridge waveguide in barium fluoride (BaF2) crystal by 15 MeV C5+ ions irradiation with femtosecond laser ablation. The near-field modal profile and propagation loss of the waveguide at mid-infrared wavelength 4 µm are investigated by using end-face coupling system. We implement a series of annealing treatment and it efficiently reduces the propagation loss of the waveguide. The confocal Raman spectra demonstrate that the lattice structure of BaF2 crystal does not change largely after C5+ ion irradiation.

Published in Frontiers in Physics

ISSN: 2296-424X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.frontiersin.org/journals/physics

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