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Bragg Gratings in the Germanium-Doped Concentric Rings of a {\hbox {Yb}}^{3+} -Doped Core Solid Photonic Bandgap Fiber

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5 Author(s)
Cook, K. ; Interdiscipl. Photonics Labs. (iPL), Univ. of Sydney, Sydney, NSW, Australia ; Padden, W. ; Canning, J. ; Fevrier, S.
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The inscription of Bragg gratings into the germanium-phosphorous co-doped rings of a photonic bandgap fiber with a ytterbium-doped core is reported. These cladding layers are observed to exhibit interesting modal properties, with each ring supporting near-degenerate modes that agree well with numerical modeling. Besides fiber laser applications, there are several potential sensing applications of gratings in such a fiber.

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Sensors Journal, IEEE  (Volume:12 ,  Issue: 1 )