Optical waveguides – Optical fiber waveguide with cladding
Reexamination Certificate
2005-08-16
2005-08-16
Lee, John D. (Department: 2874)
Optical waveguides
Optical fiber waveguide with cladding
C385S126000, C385S127000
Reexamination Certificate
active
06931185
ABSTRACT:
Photosensitivity of an inner core which is disposed in a central portion of a core is low. Photosensitivity of an outer core which is disposed close to a cladding is high. In the cladding, photosensitivity of the inner cladding which is close to the core is high and photosensitivity of an outer cladding which is outside of the inner cladding is low. A plurality of slant optical fiber grating having different optical characteristics by using the optical fiber having such photosensitivity so as to form a gain equalizing optical filter. By doing this, it is possible to provide an optical filter having a slant optical fiber grating which can maintain a filtering characteristics in a narrow bandwidth and enlarge loss area.
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Niwa Atuhiko
Okude Satoshi
Sudo Masaaki
Fujikura Ltd.
Hoffmann & Baron , LLP
Lee John D.
Lin Tina M.
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