Patent ID: 8670109
Filing Date: 2014-03-11
Classification: B82Y,G01J,G01R,H01S

Abstract:
1. A system for characterizing a plurality of external cavity semiconductor laser chips on a semiconductor bar separated from a semiconductor wafer, the system comprising: (A) an external cavity module (an EC module) comprising: (B) a chuck for holding a bar of laser chips (a laser bar), with the EC module being located adjacent to the chuck so that a beam of light emitted from a laser chip in a laser bar held on the chuck intersects the diffraction grating, a first order diffraction beam is reflected by the diffraction grating back into the laser chip to cause the laser chip to lase, and a laser beam emitted from the laser chip is reflected off the diffraction grating and the steering mirror as an output beam; (C) a computer controlled multiple axes positioning stage having one of the chuck or the EC module mounted on the positioning stage for translation of said one of the chuck or the EC module along multiple axis; and (D) a computer based controller for: