Optical waveguide with photosensitive refractive index cladding
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United States of America Patent
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Aug 15, 2000
Grant Date -
N/A
app pub date -
Mar 9, 1998
filing date -
Jan 18, 1996
priority date (Note) -
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Abstract
An optical fibre in a core and a cladding that includes an inner cladding region with a refractive index that is photosensitive to UV light, surrounded by a non-photosensitive outer cladding region. Refractive index gratings can be written into the cladding region. Also, the refractive index of the inner region can be altered by exposure to UV light to achieve mode matching at a splice between fibres with different core diameters. An optical fibre laser is disclosed with integral refractive index gratings in the cladding of a fibre with an optically active core.
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