Reducing crosstalk in optical wavelength converters

摘要

An optical fiber transmission system includes a series of optical fiber transmission spans and one or more all-optical signal processors. The optical fiber transmission spans are connected to form an optical communication path. Each all-optical signal processor directly connects a corresponding adjacent pair of the spans. Each all-optical signal processor includes an optical wavelength converter having input and output ports and a dispersion adjustment module connected to the input port of the optical wavelength converter of the same processor. The dispersion module is also configured to adjust cumulative dispersions of some received optical pulses to be outside of a range for the cumulative dispersions of corresponding optical pulses in the span directly preceding the same processor.

主权项

1. An optical fiber transmission system, comprising:
a series of optical fiber transmission spans connected to form an optical communication path; and one or more all-optical signal processors, each processor directly connecting a corresponding adjacent pair of the spans and comprising:
an optical wavelength converter having input and output ports and being connected to convert multiple optical wavelength channels, the optical wavelength converter being configured to convert one of the optical wavelength channels of the system to have a center wavelength nearer to a pump wavelength of the optical wavelength converter than the inter-channel crosstalk produced by the pump in the optical wavelength converter; anda lumped dispersion adjustment module being connected to the input port of the wavelength converter of the same processor.