Patent ID: 7209508

Claim:
A multi-channel light source, comprising: a semiconductor optical amplifier for generating light of a wide wavelength band and outputting the generated light through a first end and a second end; and a Fabry-Perot (FP) resonator for resonating the light inputted from the semiconductor optical amplifier to generate an FP fringe and outputting the FP fringe to the semiconductor optical amplifier, wherein the semiconductor optical amplifier amplifies the FP fringe inputted from the FP resonator and outputs the amplified FP fringe through the first end, wherein the FP resonator comprises a resonant medium having a first end surface receiving the light, and a second end surface coated with the external reflection layer so that the light resonates between the first and second end surfaces, the FP resonator containing Indium Phosphide (InP) for resonating the light without loss, and wherein the generated FP fringe is contained in channels and an interval between said channels is adjustable by varying a thickness of the resonant medium.