Patent ID: 7269352

Claim:
A WDM (Wavelength Division Multiplexing) light source apparatus comprising: N SOAs (Semiconductor Optical Amplifier) each having one end coated with a substance having a first reflection factor and the other end coated with a substance having a second reflection factor, the first reflection factor being higher than the second reflection factor, the N SOAs modulating respective input signals into optical signals according to a high-speed data signal to be transmitted, and amplifying the modulated signal; a 1×N multiplexer/demultiplexer having one end composed of N terminals and the other end composed of one terminal, the N terminals coupled with the N SOAs; and a reflective mirror, connected to the one terminal of the 1×N multiplexer/demultiplexer, for reflecting a first portion of a signal received from the 1×N multiplexer/demultiplexer; means for allowing each of the N SOAs to create a broadband signal, and outputting the N broadband signal to the end coated with the substance of second reflection factor; means for applying N broadband signals to the N terminals contained in one side of the 1×N multiplexer/demultiplexer; means for performing spectrum-slicing on individual broadband signals to create a multiplexed signal, and outputting the multiplexed signal to one terminal contained in the other side of the 1×N multiplexer/demultiplexer; means for allowing the first portion of the signals from the means for performing spectrum-slicing to be reflected from the reflective mirror, re-transmitting the reflected signals to one terminal of the 1×N multiplexer/demultiplexer, means for applying selected signals from among all signals from the means for performing spectrum-slicing to the reflective mirror, and transmitting the selected signals to a data transfer link; means for demultiplexing the signals retransmitted to the 1×N multiplexer/demultiplexer, and transmitting the multiplexed signals to each one end of the SOAs connected to the N terminals, the one end being coated with the substance of the second reflection factor; and means for amplifying signals received at the SOAs, reflecting the amplified signals from the second reflection factor substance, and re-transmitting the reflected signals to terminals connected to the 1×N multiplexer/demultiplexer through the one end coated with the second reflection factor substance.