Patent ID: 7622315
Filing Date: 2009-11-24
Classification: H01S

Abstract:
1. A method for fabricating a tunable laser with an integrated modulator, comprising: (a) performing a first growth step, wherein a buffer layer, a waveguide layer, a stop etch layer, an active region, and a terminating layer are grown on a semiconductor wafer; (b) patterning and etching the terminating layer and active region down to the stop-etch layer, everywhere except in a gain section of the laser; (c) patterning and etching of one or more sets of periodically sampled gratings in one or more mirror sections of the laser; (d) performing a second growth step that completes a vertical structure growth of the terminating layer and a contact layer beneath one or more contacts of the laser; (e) isolating sections of the laser from one another, and between the modulator and the laser; (f) patterning the contacts of the laser, removing the contact layer therebetween by etching, and metalizing the contacts; (g) patterning and etching a ridge waveguide stripe down to either the active region or the waveguide layer and; (h) cleaving the device out of the wafer, and then applying an antireflective coating on at least one end of the device.