Optical devices and methods of manufacture thereof

Details Optical devices and methods of manufacture thereof Optical devices and methods of manufacture thereof

2005-07-26

2005-07-26

Williams, Joseph (Department: 2879)

Optical waveguides

Optical fiber waveguide with cladding

Utilizing multiple core or cladding

C385S126000, C385S128000

Reexamination Certificate

active

06922513

ABSTRACT:
An optical fiber has a core, an inner cladding and an outer cladding on. In a first region the inner cladding refractive index has a first value which differs from the core refractive index by about 0.0045. The inner cladding refractive index changes along said fiber from the first value to a second value at a free-space end. The second value matches the core refractive index, so that the effective diameter of the core at the free-space end is that of the core plus the inner cladding. Hence the outer cladding acts to constrain the light in the end region. The spot-size and the V number (normalized frequency) are increased, thereby increasing offset tolerances.

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