Patent ID: 6341138
Filing Date: 2002-01-22
Classification: H01S

Abstract:
An improved vertical cavity surface emitting laser (VCSEL) wherein the improvement comprises:an output mirror stack having a semiconductor distributed Bragg reflector and a dielectric distributed Bragg reflector; wherein the semiconductor distributed Bragg reflector has an index contrast ratio that changes with temperature; wherein the dielectric distributed Bragg reflector has an index contrast ratio that changes less with temperature than that of the semiconductor distributed Bragg reflector; wherein the distributed Bragg reflector and the dielectric distributed Bragg reflector are made from different material; wherein a center wavelength of the semiconductor distributed Bragg reflector is different than a center wavelength of the dielectric distributed Bragg reflector; wherein the VCSEL has a lasing wavelength; and the center wavelength of the dielectric distributed Bragg reflector is at a shorter wavelength than the lasing wavelength.