HIGH-YIELD HIGH-PRECISION DISTRIBUTED FEEDBACK LASER BASED ON AN ARRAY
A distributed-feedback laser with wavelength accuracy and spectral purity. An array of lasers with highly reflecting/anti reflecting facets is fabricated on a single chip with controlled variations, in for example laser gratings. A laser that best meets predetermined specifications is selected and configured for use.
1 . An increased yield distributed feedback (DFB) laser device, comprising:
a plurality of DFB lasers on a chip, each of the DFB lasers capable of lasing light, the light having spectral characteristics depending at least in part on a grating forming part of each DFB laser, wherein each grating differs by a controlled grating variation, and wherein the chip is mounted on a submount, the submount including only one bond pad thereon for receiving an electrical coupling from the DFB lasers, and only one DFB laser is electrically coupled to the one bond pad such that only the one DFB laser is operationally configured to lase light.
2 . The increased yield DFB device of claim 1 wherein the controlled grating variation comprises a variation in phase.
3 . The increased yield DFB device of claim 2 wherein each grating has substantially the same period.
4 . The increased yield DFB device of claim 3 wherein each grating has the same period.
5 . The increased yield DFB device of claim 1 wherein the controlled grating variation comprises a variation in grating period.
6 . The increased yield DFB device of claim 1 wherein the controlled grating variation comprises a variation in phase and grating period.
7 . The increased yield DFB device of claim 1 wherein each of the DFB lasers is configured to lase light approximate the same wavelength.
8 . The increased yield DFB device of claim 1 wherein the single DFB operationally configured to lase light is a DFB laser meeting predetermined spectral specifications.
9 - 45 . (canceled)