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US 2003/0152345 A1Published application
Sectionally photosensitive optical waveguides
Assignee3M Innovative Properties Company
InventorsNirmal K. Viswanathan, Dora M. Paolucci, James B. Carpenter
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Abstract
An optical waveguide, such as an optical fiber, including a length of waveguide and at least one discrete longitudinal section having increased photosensitivity with respect to other portions of the waveguide.
Claims28
An optical waveguide comprising:
- a) a length of waveguide;
- and
- b) at least one discrete longitudinal section having increased photosensitivity with respect to other portions of the waveguide.
An optical device comprising:
- a) a length of optical fiber;
- and
- b) a section of increased refractive index along the length of optical fiber.
An optical device comprising:
- a) a length of optical fiber;
- b) at least one grating along the length of optical fiber;
- and
- c) a hydroxyl absorption band along the grating.
1 more element
A method for writing an optical grating comprising the steps of:
- a) providing a length of optical waveguide comprising at least one discrete longitudinal section of the optical waveguide, the section having:
- i) a hydroxyl band with absorption in the 1410 nm absorption region;
- ii) a short wavelength absorption band having a magnitude >0.1 dB/cm at wavelengths less than or equal to 800 nm;
- iii) where neither the hydroxyl band nor the short wavelength band are present in the waveguide outside of the at least one longitudinal section;
- b) exposing only one or more of the at least one longitudinal sections to a patterned source of actinic radiation.
2 more elements
Dependencies are inferred from the claim text.