Photo-sensitive fiber
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United States of America Patent
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Apr 24, 2001
Grant Date -
N/A
app pub date -
Oct 6, 1998
filing date -
Jan 28, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Abnormal losses outside a reflection band attributable to a mismatch of core field diameters are suppressed. A photo-sensitive fiber comprising a core 1 and a cladding having a cladding inner layer and a cladding outer layer formed in this order around the core, in which at least the core is photo-sensitive to form a grating. The core and cladding inner layer include a photo-sensitive dopant for increasing the refractive index. The core additionally includes a first non-photo-sensitive dopant for increasing the refractive index and the cladding inner layer additionally includes a second non-photo-sensitive dopant for creasing the refractive index.
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