Abstract: The present invention discloses an optical line terminal that includes one or more downstream signal processing means for generating a downstream signal, and converting data of the downstream signal into a serial data; a wavelength division multiplexing means for combining the serial data of different wavelengths together and then performing transmission of the combined signals; and one or more upstream signal processing means for extracting data of an upstream signal from the wavelength division multiplexing means. The terminal includes an extender including a first optical amplifier for amplifying the upstream signal, a second optical amplifier for amplifying the downstream signal, a Raman wavelength division multiplexing module for separating and combining data signal and pump light from Raman pump unit, and a Raman pump unit coupled to the Raman wavelength division multiplexing module to provide Raman amplification to the upstream and downstream signals.

Abstract: The present invention provides an improved optical communication network (300) that utilizes an apparatus of optical channel protection. The apparatus for optical channel protection of the present invention including a transmitting end network switch (200), a first and a second receiving end network switch (201, 202), a plurality of wavelength tuneable transmitting end transponders (400, 401 . . . 405), a plurality of wavelength tuneable receiving end transponders (400?, 401? . . . 405?), a transmitting end controller (10a) connected to a network monitoring and control system (100a) and a receiving end controller (10b) connected to said network monitoring and control system (100a). The present invention utilizes a method of optical channel protection that can be broadly categorized under optical multiplex switching.

Abstract: The present invention provides an improved optical communication network (300) that utilizes an apparatus of optical channel protection. The apparatus for optical channel protection of the present invention including a transmitting end network switch (200), a first and a second receiving end network switch (201, 202), a plurality of wavelength tuneable transmitting end transponders (400, 401 . . . 405), a plurality of wavelength tuneable receiving end transponders (400?, 401? . . . 405?), a transmitting end controller (10a) connected to a network monitoring and control system (100a) and a receiving end controller (10b) connected to said network monitoring and control system (100a). The present invention utilizes a method of optical channel protection that can be broadly categorized under optical multiplex switching.