Optical communications – Multiplex – Wavelength division or frequency division
Reexamination Certificate
2006-09-26
2006-09-26
Payne, David C. (Department: 2613)
Optical communications
Multiplex
Wavelength division or frequency division
C398S009000, C370S347000, C370S537000
Reexamination Certificate
active
07113703
ABSTRACT:
An optical transmission system and optical transmission devices in the optical transmission system that can achieve a high quality transmission using considerably simple arrangements are disclosed. At a transmitting-end optical transmission device, encoding means having n outputs, forms k data by aligning phases of data on k channels with each other and for generating (n−k) error correction bits for said k data and adding said (n−k) error correction bits to said k data, and wavelength-multiplexing means connected to the encoding means, converts both said k data and said (n−k) error correction bits to n optical signals having different wavelengths and for wavelength-multiplexing said n optical signals so as to be delivered to the optical transmission line. At a receiving-end optical transmission device, wavelength-demultiplexing means separates the wavelength-multiplexed optical signals from the optical transmission line into n optical signals, each corresponding to one of the different wavelengths, and decoding means connected to the wavelength-multiplexing means, generates k error corrected data by correcting error bits using the (n−k) error correction bits contained in said n separated optical signals.
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Fujitsu Limited
Payne David C.
Staas & Halsey , LLP
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