Patent ID: 7149431

Claim:
A Fabry-Perot laser device for providing a wavelength-division-multiplexed optical signal to an optical transmission link, comprising: an optical circulator having a plurality of ports for outputting light circulating in an optical waveguide loop; at least one optical fiber amplifier disposed in the optical waveguide loop for amplifying light circulating in the optical waveguide loop; a laser light source coupled to the optical circulator via one of the plurality of ports to receive light circulating in the optical waveguide loop and, a wavelength division multiplexer for demultiplexing light received from the optical circulator via one of the plurality of ports; and, a plurality of Fabry-Perot lasers coupled to receive the demultiplexed light and for outputting wavelength-locked light signals having self-seeded wavelengths back to the wavelength division multiplexer for multiplexing the wavelength-locked light back to the optical circulator; and, a first splitter coupled to the optical circulator via one of the plurality of ports for splitting a portion of the light outputted from the circulator to the optical transmission link.