Fabrication and characterization of indium fluoride multimode fused fiber couplers for the mid-infrared

Fabrication and characterization of indium fluoride multimode fused fiber couplers for the mid-infrared

Results of the fabrication and characterization of optical fiber couplers made of multimode step-index fluoroindate (InF 3 ) fibers are presented. The fabrication setup was customized for this type of glass with a constant source of controlled nitrogen flow heated to a target temperature with an acc...

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Veröffentlicht in:Optics express 2023-09, Vol.31 (20), p.33670-33678
Hauptverfasser: Séguin, Alexis, Becerra-Deana, Rodrigo Itzamná, Virally, Stéphane, Boudoux, Caroline, Godbout, Nicolas
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container_issue 20
container_start_page 33670
container_title Optics express
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creator Séguin, Alexis
Becerra-Deana, Rodrigo Itzamná
Virally, Stéphane
Boudoux, Caroline
Godbout, Nicolas
description Results of the fabrication and characterization of optical fiber couplers made of multimode step-index fluoroindate (InF 3 ) fibers are presented. The fabrication setup was customized for this type of glass with a constant source of controlled nitrogen flow heated to a target temperature with an accuracy ±1°C. Combined with a novel fast fusion approach and with excellent control of the viscosity throughout the process, the clean gas flow and well-controlled temperature enable the fabrication of fused fiber couplers absent of any noticeable crystallization. A coupling ratio of 45/55 was achieved, with an excess loss of 0.35 dB, at 1.7 µm. To the best of our knowledge, this represents the first low excess loss (
doi_str_mv 10.1364/OE.501849
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title Fabrication and characterization of indium fluoride multimode fused fiber couplers for the mid-infrared
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