Optical communication system and optical transmitting device app

Details Optical communication system and optical transmitting device app Optical communication system and optical transmitting device app

1997-11-20

2000-09-05

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359124, 359110, H04J 1402

Patent

active

061151580

ABSTRACT:
In an optical communication system and an optical transmitting device applied thereto, there are provided two LDs to an optical transmission circuit within a branch station, one of which for generating a transmission optical signal with a wavelength .lambda.i, and the other for generating an adjustment optical signal with a wavelength .lambda.x. Those two optical signals with wavelengths .lambda.i and .lambda.x are to be integrated at an optical coupler so as to be transmitted to a branching device where ADM is to be conducted, after passing through an optical amplifier where an output level is controlled to be fixed. Therefore, by adjusting with an adjuster the output level of the LD generating the adjustment optical signal, the level of the adjustment optical signal is adjusted, which makes it possible to alter the level of a transmission signal with the wavelength .lambda.i within the output from the optical amplifier.

REFERENCES:
patent: 5894362 (1999-04-01), Onaka et al.
patent: 5978119 (1999-11-01), Giles et al.

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