Patent ID: 6869483
Filing Date: 2005-03-22
Classification: C23C,H01S

Abstract:
1. An apparatus for coating at least one of the front and rear facets of semiconductor laser diodes, lasers, with an anti-reflection layer of minimal rest reflectivity, said apparatus including means for monitoring, in-situ, at least one of laser parameters of each laser, including laser light emitted from at least one of the front and rear facets of each laser, the electric voltage at a p-n junction of the laser, the quantum efficiency of the laser light emitted from at least one of the front and rear facet of the laser, and the threshold current of the laser, said apparatus comprising a receiver for containing lasers to be coated, a coating source disposed in said receiver, a support structure for supporting said lasers to be coated such that said lasers are supported with their facets all at essentially the same distance from said coating source, and for each laser an individual shutter supported in said receiver so as to be movable selectively in front of said lasers to protect them from further coating when the laser parameters indicate that an optimum coating stage has been reached for a particular laser.