G - Physics – 08 – C
Patent
G - Physics
08
C
G08C 15/04 (2006.01) G01V 8/00 (2006.01) H04J 14/02 (2006.01)
Patent
CA 2497425
In each of a plurality of submarine observation apparatus (1 to n), a branching unit (63) branches fixed-wavelength light (.lambda.1) from an incoming wavelength-multiplexed light signal. An observation signal modulating unit (64) modulates the intensity of the branched fixed-wavelength light (.lambda.1) with observation information multiplexed by an observation signal multiplex unit (61). A combining unit (65) combines light signals (.lambda.2) to (.lambda.n) passing through the branching unit (63) and the fixed-wavelength light (.lambda.1a) modulated by the observation signal modulating unit (64) into a composite light signal, and outputs it to an optical fiber (12a). Therefore, in each of the plurality of submarine observation apparatus (1 to n) there is no necessity for providing a wavelength-division-multiplexing-transmission optical transmitter which requires high wavelength stability.
Asakawa Ken'ichi
Fujieda Tasuku
Goto Hideki
Kawaguchi Katsuyoshi
Mikada Hitoshi
Japan Agency For Marine-Earth Science And Technology
Kirby Eades Gale Baker
Mitsubishi Denki Kabushiki Kaisha
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