Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2006-06-27
2006-06-27
Doan, Jennifer (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
C385S037000
Reexamination Certificate
active
07068897
ABSTRACT:
The present invention provides a new and unique method for increasing the photosensitivity of a large diameter optical waveguide having a cross-section of at least about 0.3 millimeters. The method features loading the large diameter optical waveguide with a photosensitizing gas at a pressure at least about 4000 pounds per square inch (PSI) at a temperature of at least about 250E Celsius. The photosensitizing gas may be hydrogen, Deuterium or other suitable gas. The method also includes the step of using a particular large diameter optical waveguide having a diameter of greater than 0.9 millimeters. The method may be used as part of a process for writing a Bragg grating in an inner core or a cladding of the large diameter optical waveguide.
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D. McStay, “Photosensitive Changes in Ge-doped fibers observed by Raman Spectroscopy”, Fiber Optics '90, pp. 223-233, SPIE vol. 1315.
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Dawson Jay W.
MacDougall Trevor W.
Putnam Martin A.
Russell Jerin J.
Troll John R.
CiDRA Corporation
Doan Jennifer
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