US 2003/0072064 A1 · Supervisory controlling method and supervisory controlling system of optical repeater

Abstract

The present invention aims at providing a technique capable of supervising and controlling optical repeaters, without affecting transmission characteristics and wavelength bands of signal lights, by utilizing the Raman effect. To this end, the present invention provides a supervisory controlling system of an optical repeater, in an optical amplifying-and-repeating transmission system for amplifying and repeatingly transmitting signal light propagated through an optical transmission path by the optical repeater, wherein the supervisory control signal light is amplified due to the Raman effect by the signal light acting as excitation light in an optical transmission path (Raman amplifying medium), to thereby supervise and control the optical repeater in accordance with the thus Raman amplified supervisory control signal light.

Claims16

Dependent claims

A supervisory controlling method for supervising and controlling an optical repeater based on supervisory control information to be transmitted together with a signal light propagated through an optical transmission path in an optical amplifying-and-repeating transmission system for amplifying and repeatingly transmitting said signal light by said optical repeater,

wherein a supervisory control signal light having a wavelength capable to be amplified due to the Raman effect by said signal light is Raman amplified in a Raman amplifying medium on said optical transmission path by said signal light acting as an excitation light, to thereby supervise and control said optical repeater in accordance with said Raman amplified supervisory control signal light.

A supervisory controlling system for supervising and controlling an optical repeater based on supervisory control information to be transmitted together with a signal light propagated through an optical transmission path in an optical amplifying-and-repeating transmission system for amplifying and repeatingly transmitting said signal light by said optical repeater,

comprising a supervisory control signal light generating section that generates a supervisory control signal light having a wavelength capable to be amplified due to the Raman effect by said signal light,
wherein said optical repeater is supervised and controlled in accordance with said supervisory control signal light that is generated by said supervisory control signal light generating section and Raman amplified in a Raman amplifying medium on said optical transmission path by said signal light acting as an excitation light.

A supervisory controlling system for supervising and controlling an optical repeater based on supervisory control information to be transmitted together with a wavelength-division multiplexed signal light propagated through an optical transmission path in an optical amplifying-and-repeating transmission system for amplifying and repeatingly transmitting said wavelength-division multiplexed signal light by said optical repeater,

wherein when said optical repeater includes an excitation light supplying section that supplies a plurality of excitation lights of different wavelengths to a Raman amplifying medium on said optical transmission path, to Raman amplify and repeatingly transmit the wavelength-division multiplexed signal light propagated through said optical transmission path,
said optical repeater is provided with an excitation light modulating section that applies, among the plurality of excitation lights to be supplied to said Raman amplifying medium, the modulation onto the excitation light enabling to Raman amplify the signal lights at longer wavelength side included in said wavelength-division multiplexed signal light, to thereby return a response signal to a supervisory controlling command by the modulation components included in the signal lights at longer wavelength side that have been Raman amplified by the excitation light modulated by said excitation light modulating section.

Dependencies are inferred from the claim text.

Supervisory controlling method and supervisory controlling system of optical repeater

Life of this patent

Supervisory controlling method and supervisory controlling system of optical repeater

Life of this patent

Abstract

Claims16