Optical transmission system

Details Optical transmission system Optical transmission system

1994-07-29

1995-10-31

Bodreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359161, 359160, H04J 1402

Patent

active

054634873

ABSTRACT:
In a wavelength division optical transmission system incorporating optical amplifiers, an identifying pilot tone is modulated on to each multiplexed wavelength. Each system amplifier determines from the pilot tones the total number of wavelengths being transmitted and thereby provides a corresponding adjustment of the amplifier gain. This prevents overamplification when one or more wavelengths is missing from the multiplexed signal e.g. as the result of a transmitter fault.

REFERENCES:
patent: 5035481 (1991-07-01), Mollenauer
patent: 5276543 (1994-01-01), Olshansky
patent: 5280383 (1994-01-01), Federici et al.

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