Optical path switching

摘要

A light source package is disclosed for a Raman amplifier node having a primary optical fiber for carrying an optical signal and a secondary optical fiber for carrying the optical signal when the signal is rerouted from the primary optical fiber. The light source package includes a primary light source for emitting light into the primary optical fiber when the optical signal is carried by the primary optical fiber to induce Raman gain of the optical signal, and a secondary light source for emitting light into the secondary optical fiber when the optical signal is carried by the secondary optical fiber to induce Raman gain of the optical signal.

主权项

1. A Raman amplifier node comprising
a primary optical fibre for carrying an optical signal; a secondary optical fibre for carrying the optical signal when the optical signal is rerouted from the primary optical fibre; a pump light source package comprising
at least one primary light source for injecting pump light into the primary optical fibre when the optical signal is carried by the primary optical fibre, the pump light for inducing Raman gain of the carried optical signal; andat least one secondary light source for injecting pump light into the secondary optical fibre when the optical signal is carried by the secondary optical fibre, the pump light for inducing Raman gain of the carried optical signal; and an optical switch for selecting between the primary optical fibre and the secondary optical fibre, the optical switch arranged upstream of an input point of the pump light injected by the primary and second light sources so that light injected by the primary and secondary sources does not pass through the optical switch.