Patent ID: 8102886

Claim:
A monolithically integrated laser device comprising: a. a first mirror; b. a diffraction grating for diffracting a laser beam into a plurality of diffracted laser beams, the laser beam being received from the first mirror, wherein each of the plurality of diffracted laser beams is directed to a specific spatial direction, each diffracted laser beam having a specific wavelength; c. a plurality of feedback waveguides, wherein each of the plurality of feedback waveguides is present in the corresponding specific spatial direction, wherein a feedback waveguide from the plurality of feedback waveguides is selected to receive a diffracted laser beam of a desired wavelength from the plurality of diffracted laser beams; d. a plurality of second mirrors, wherein each of the plurality of feedback waveguides precedes a corresponding second mirror, wherein a second mirror corresponding to the selected feedback waveguide reflecting the diffracted laser beam of the desired wavelength; and e. a semiconductor substrate in which the laser beam, the plurality of diffracted laser beams and the reflected laser beam from the second mirror is confined to propagate within a plane parallel to the semiconductor substrate, wherein the first mirror, the diffraction grating, the plurality of feedback waveguides and the plurality of second mirrors are fabricated on the semiconductor substrate.