Optical communication system and optical transmitting device applied thereto
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United States of America Patent
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Nov 20, 1997
filing date -
Nov 22, 1996
priority date (Note) -
In Force
status (Latency Note)
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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.
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