Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-03-08
2005-03-08
Kang, Juliana K. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C356S364000
Reexamination Certificate
active
06865320
ABSTRACT:
A matched pair of tilted gratings may be formed in a section of optical fiber (or waveguide) and used as a “tap” to measure the power of an optical signal passing through the fiber. By using a pair of highly-tilted gratings (e.g., tilted at an angle of 45° with respect to the optical axis) and orienting the gratings to be orthogonal with respect to one another (i.e., azimuthal orthogonality around the fiber axis), a pair of orthogonally polarized beams will be out-coupled from the propagating signal. Since the pair of beams are orthogonal, their sum can be made insensitive to variations in polarization of the optical signal propagating along the fiber.
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patent: 5982962 (1999-11-01), Koops et al.
patent: 6069985 (2000-05-01), Albin et al.
patent: 6198557 (2001-03-01), Dultz et al.
patent: 6211957 (2001-04-01), Erdogan et al.
Fitel U.S.A. Corp.
Kang Juliana K.
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