Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1992-07-01
1995-04-18
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
369187, 369192, 369194, H04J 1402, H04B 1004, H04B 1006
Patent
active
054083494
ABSTRACT:
An optical frequency division multiplexing transmission system for sending a large volume of information by a single optical fiber is disclosed. Each of an optical frequency division multiplexing transmitter equipment and an optical frequency division multiplexing receiver equipment has an optical filter having a periodic optical transmission characteristic therein. Each optical filter is stabilized with an absolutely-stabilized standard optical frequency. Each optical signal frequency is stabilized to a periodic transmission characteristic of the optical filter arranged in the optical frequency division multiplexing transmitter equipment, and each local frequency to a periodic transmission characteristic of the optical filter arranged in the optical frequency division multiplexing receiver equipment. Even in the case where no optical signal is applied to the optical frequency division multiplexing receiver equipment due to such causes as a fault of the transmission optical source or the breakage of an optical fiber, the local optical source frequency continues to be controlled in stable fashion.
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Kuboki Katsuhiko
Sasaki Shinya
Tsushima Hideaki
Hitachi , Ltd.
Pascal Leslie
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