Patent ID: 7272316

Claim:
A wavelength-division-multiplexed optical source comprising: a pump laser; a first optical amplifier, operated by rear-pumping of the pump laser, for generating amplified spontaneous emission noise (ASE noise); a first multiplexer/demultiplexer having a first input/output terminal on one side and a plurality of second input/output terminals on the other side, the first multiplexer/demultiplexer for demultiplexing signals inputted into the first input/output terminal and outputting the demultiplexed signals to the second input/output terminals, and the first multiplexer/demultiplexer for multiplexing signals inputted into the second input/output terminals and outputting the multiplexed signals to the first input/output terminal; a plurality of mirrors, connected to the second input/output terminals in one-to-one correspondence, for inputting the demultiplexed signals outputted through the second input/output terminals back to the second input/output terminals; a circulator for transmitting signals inputted from the first optical amplifier to the first input/output terminal, the circulator for outputting multiplexed signals inputted from the first input/output terminal; a second optical amplifier, operated by rear-pumping of the pump laser, for amplifying multiplexed signals outputted from the circulator; an optical splitter for splitting the multiplexed signals amplified by the second optical amplifier, the optical splitter for outputting the split signals to the first optical amplifier for external transmission, respectively; and an external modulator for modulating the signals outputted for external transmission according to preset broadcasting signals and for outputting the modulated signals to a transmission link.