Cladding-mode resonances in short- and long-period fiber grating filters

By T. Erdogan. 2000

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Cladding-mode-resonances in air-silica microstructure optical fibers (2000, background): “The phase matching condition for copropagating grating couplers [20], [21], [23] can be written as”
Bragg gratings written in all-SiO/sub 2/ and Ge-doped core fibers with 800-nm femtosecond radiation and a phase mask (2004, background): “For UV-induced gratings, the index perturbation responsible for cladding-mode coupling generally exists only in the core of the fiber [18].”
Corrugated long-period fiber gratings as strain, torsion, and bending sensors (2001, methodology): “use the coupled-mode theory [11], [12] to qualitatively describe the operation of the corrugated LPFG as a sensing device.”
Optical fibre long-period grating sensors: characteristics and application (2003, background): “This is because the electric field profile of the even-order modes is such that the field amplitude is low within the core, whereas the electric field profiles of the odd modes have a peak located within the core [45].”