Improving signal to noise ratio in an optical transmission syste

Details Improving signal to noise ratio in an optical transmission syste Improving signal to noise ratio in an optical transmission syste

1993-11-12

1995-08-29

Ullah, Akm E.

Optical waveguides

With optical coupler

Plural

G02B 600

Patent

active

054468124

ABSTRACT:
An optical transmission system comprises a concatenated chain of amplifiers disposed along a fiber transmission path. The signal to noise ratio is measured at each amplifier by selectively notch filtering a transmitted signal and measuring the power of the filtered and unfiltered signal within the notch bandwidth. A supervisory system controls the gain of each system amplifier whereby to maximize the aggregate signal to noise ratio of the system.

REFERENCES:
patent: 4947134 (1990-08-01), Olsson
patent: 4947459 (1990-08-01), Nelson et al.
patent: 5225922 (1993-07-01), Chraplyvy et al.

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