Bending-induced mode non-degeneracy and coupling in chalcogenide negative curvature fibers

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oe241112228.pdf (2.88 MB)

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https://opg.optica.org/oe/abstract.cfm?uri=oe-24-11-12228

Permanent Link

https://doi.org/10.1364/OE.24.012228
 http://hdl.handle.net/11603/38731

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UMBC Computer Science and Electrical Engineering Department
UMBC Faculty Collection

Author/Creator

Author/Creator ORCID

https://orcid.org/0000-0003-0269-8433

Date

2016-05-30

Type of Work

journal articles
Text

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Program

Citation of Original Publication

Wei, Chengli, Curtis R. Menyuk, and Jonathan Hu. “Bending-Induced Mode Non-Degeneracy and Coupling in Chalcogenide Negative Curvature Fibers.” Optics Express 24, no. 11 (May 30, 2016): 12228–39. https://doi.org/10.1364/OE.24.012228.

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Subjects

Bend loss
Carbon dioxide lasers
Photonic crystal fibers
Fiber fabrication
Resonant modes
Chalcogenide glass
UMBC Optical Fiber Communications Laboratory
UMBC High Performance Computing Facility (HPCF)

Abstract

We study bend loss in chalcogenide negative curvature fibers with different polarizations, different tube wall thicknesses, and different bend directions relative to the mode polarization. The coupling between the core mode and tube modes induces bend loss peaks in the two non-degenerate modes at the same bend radius. There is as much as a factor of 28 difference between the losses of the two polarization modes. The fiber with a larger tube wall thickness, corresponding to a smaller inner tube diameter, can sustain a smaller bend radius. The bend loss is sensitive to the bend direction when coupling occurs between the core mode and tube modes. A bend loss of 0.2 dB/m at a bend radius of 16 cm, corresponding to 0.2 dB/turn, can be achieved in a chalcogenide negative curvature fiber.