Optical transmission system

Details Optical transmission system Optical transmission system

1997-11-18

2000-04-25

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359110, 359134, 359179, 359177, H04B 1000

Patent

active

060550821

ABSTRACT:
In an optical transmission system in which an optical main signal and a monitoring control optical signal are wavelength-multiplexed and transmitted from a transmitter and the optical signal is directly amplified by a repeater and transmitted, low frequency pulse signals which are synchronized with the respective optical main signal and monitoring control signal are multiplexed with each others, a distance of a transmission section is specified by a phase difference between the low frequency pulse signals according to a difference in propagation rate of a transmission line due to a difference of wavelength between the optical main signal and the monitoring control signal and the optimal dispersion compensation is made possible even when a required dispersion compensation is changed due to a change of the transmission line by switching the optical transmission line to a DCF having an optimal amount of dispersion compensation.

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patent: 5225922 (1993-07-01), Chraplyvy et al.
patent: 5966228 (1999-10-01), Akiba et al.

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