Patent · US Expired

Optical signal varying devices

US6344922B1 · kind B1 · utility

84Cited by
60References
33Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 19, 1999
Grant dateFeb 5, 2002
Priority date
Expiry dateFeb 19, 2019

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04B2210/003
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

Optical systems of the present invention include a plurality of optical processing nodes in optical communication via at least one signal varying device. The signal varying devices includes an optical fiber suitable for facilitating Raman scattering/gain in a signal wavelength range and a pump energy source for providing pump energy in a plurality of pump wavelengths. The pump source provides sufficient pump energy in each pump wavelength to stimulate Raman scattering/gain in the optical fiber within the signal wavelength range. The pump wavelengths are selected such that the combined Raman gain resulting from the pump energy supplied by each pump wavelength produces a desired signal variation profile in the signal wavelength range. In addition, the pump energy supplied by at least one of the pump wavelengths can be varied to produce a controlled signal intensity variation profile over the signal wavelength range in the optical fiber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.