Optical fiber and optical fiber grating
AssigneesSumitomo Electric Industries, Ltd., Sumitomo Electric Optifrontier Co., Ltd.
InventorsShigehiro Nagano, Masakazu Shigehara, Masayuki Yamazaki
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Abstract
An optical fiber according to an embodiment includes a core having a single-peaked and graded refractive index profile, an inner cladding surrounding the core, and an outer cladding surrounding the inner cladding. The inner and outer claddings have refractive indices lower than the maximum refractive index of the core. A photosensitive region constituted by the core and the inner cladding contains a photosensitive material. The inner cladding has an outer diameter one time or more and two times or less the MFD of an LP01 mode in a 1310-nm wavelength band.
Claims8
An optical fiber comprised of silica-based glass, the optical fiber comprising:
- a core having a single-peaked and graded refractive index profile;
- an inner cladding surrounding the core and having a refractive index lower than a maximum refractive index of the core;
- and
- an outer cladding surrounding the inner cladding and having a refractive index lower than the maximum refractive index of the core,
- wherein the optical fiber including a photosensitive region constituted by the core and the inner cladding contains a photosensitive material, and
- the inner cladding has an outer diameter one time or more and two times or less a mode field diameter of an LP01 mode in a 1310-nm wavelength band.
Dependencies are inferred from the claim text.