Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-09-20
2005-09-20
Palmer, Phan T. H. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S042000, C385S050000, C359S569000
Reexamination Certificate
active
06947641
ABSTRACT:
Apparatus for filtering optical radiation at an operating wavelength (19), which apparatus comprises a grating (1) written into a waveguide (2), and which grating (1) has a first end (3), a second end (91), a first bandwidth (24), a maximum re-flectivity (29), a first group delay variation (17) defined with respect to the first end (3), and a second group delay variation (18) defined with respect to the second end (91), wherein the first and second group delay variations (17), (18) are with respect to the first bandwidth (24), the maximum reflectivity (29) is greater than 50%, the first group delay variation (17) is between 0.1 ps and 100 ps, and the second group delay variation (18) is between 0.1 ps and 100 ps.
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Durkin Michael Kevan
Zervas Mikhail Nickolaos
Palmer Phan T. H.
Reid John S.
Reidlaw, L.L.C.
Southampton Photonics LTD
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