Patent ID: 7567603
Filing Date: 2009-07-28
Classification: H01S

Abstract:
1. A semiconductor laser having an increased catastrophic optical damage level comprising: a semiconductorchip having first and a second reflective surface, disposed opposite each other to form an optical cavity with a cavity length L a window region of length L an active waveguide layer within the optical cavity for emitting the laser emission to the second reflective surface through the window region, and extending from the window region towards the first reflective surface; a first current injection region for electrically pumping current into a main section of the active waveguide layer to produce a first current density for obtaining the laser emission; a first blocking layer of length L a second current injection region for electrically pumping current into a partially pumped section of the active waveguide layer disposed between the first blocking layer and the first current injection region to produce a second current density, wherein the second current density is less than the first current density.