Optical waveguides – Optical fiber waveguide with cladding – With graded index core or cladding
Patent
1992-05-05
1993-08-10
Ullah, Akm E.
Optical waveguides
Optical fiber waveguide with cladding
With graded index core or cladding
385141, 65 311, G02B 618
Patent
active
052356590
ABSTRACT:
Unexpectedly large normalized refractive index changes (.DELTA.>10.sup.-5, but possibly even larger than 10.sup.-3) can be obtained in SiO.sub.2 -based optical waveguides (fiber or planar waveguides) by a treatment that comprises exposing at least a portion of the waveguide at a temperature of at most 250.degree. C. to H.sub.2 (partial pressure greater than 1 atmosphere), and irradiating at least a part of the exposed portion with actinic (typically UV) radiation.
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Atkins Robert M.
Lemaire Paul J.
Mizrahi Victor
Walker Kenneth L.
AT&T Bell Laboratories
Pacher E. E.
Ullah Akm E.
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