Inscription of Fiber Bragg Grating Arrays in Pure Silica Suspended Core Fibers

in: IEEE Photonics Technology Letters (2009)
Becker, Martin; Fernandes, Luis Andre; Rothhardt, Manfred; Brückner, Sven; Schuster, Kay; Kobelke, Jens; Frazão, Orlando; Bartelt, Hartmut; Marques, Paulo V. S.
Fiber Bragg grating (FBG) arrays in pure silica fourleaf-clover-shaped suspended core fibers were inscribed with two-beam interference and a deep UV femtosecond laser source. The target fibers are pure silica and do not contain any dopants, nor were they treated with hydrogen before grating inscription. The inscription method is appropriate to measure the effective mode field index of the fiber and allows confinement factors of the guided modes to be derived. Applications of such FBGs can be expected especially for fiber sensing.

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