Optical waveguides – With optical coupler – Plural
Reexamination Certificate
2007-04-17
2007-04-17
Doan, Jennifer (Department: 2874)
Optical waveguides
With optical coupler
Plural
C385S037000, C359S341430
Reexamination Certificate
active
11163511
ABSTRACT:
An apparatus for monitoring fiber-fault in an optical networks, such as a passive optical networks, suitable for monitoring at least one fiber path in connection. The apparatus includes at least one fiber grating, having an individual central wavelength and coupling with the fiber networks; at least one reflection unit; and at least one optical gain medium unit, which is coupled between the fiber grating and the reflection unit, so as to produce at least one optical signal. The optical signal is amplified by allowing the optical signal to transmit to-and-fro between the fiber grating and the reflection unit, and then inducing excitation. The optical signal corresponding to the reflection unit has a corresponding spectrum for use in monitoring the optical network.
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Article titled “Fiber-Fault Identification for Branched Access Networks Using a Wavelength-Sweeping Monitoring Source” jointly published by Chan et al. IEE Electron Device Letters, vol. 11, No. 5, May 1999, pp. 614-616.
Doan Jennifer
Industrial Technology Research Institute
Jiang Chyun IP Office
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