G - Physics – 02 – B
Patent
G - Physics
02
B
88/0.1, 88/97.2
G02B 5/26 (2006.01)
Patent
CA 1112489
TITLE OPTICAL FIBER REFLECTIVE FILTER INVENTORS Kenneth O. Hill Brian S. Kawasaki Derwyn C. Johnson Yoshimasa Fujii ABSTRACT OF THE DISCLOSURE The optical reflective filter is made from a photosensitive optical fiber having a cladding and a core including germanium. Refractive index perturbations are light induced in the fiber in the region of the guided light. The perturbations can be made to have a constant or a varying periodicity, or a series of constant periodicities. The filters are made from single mode or low order mode fibers having germanium doped silica or germania cores. The center frequency for reflective band or bands has a wavelength in the 400 nm to 550 nm range. The reflective band or bands in the filter can be shifted by stretching the filter.
348613
Fujii Yoshimasa
Hill Kenneth O.
Johnson Derwyn C.
Kawasaki Brian S.
Her Majesty The Queen In Right Of Canada
Rymek Edward
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