Patent ID: 6542529
Filing Date: 2003-04-01
Classification: H01S

Abstract:
A laser source having a cavity formed between two reflecting end facets, comprising:a first material region disposed within the cavity and having a first refractive index; and a second material region having a second refractive index less than the first refractive index, and forming a first interface with the first material region, the first interface intersecting said two reflecting end facets at a predetermined acute angle greater than 0Â° and less than 90Â°, so that a lowest order reflection mode intracavity light beam is incident on the first interface at an angle below a critical total internal reflection angle associated with the interface, and higher order reflection modes are incident on the first interface at angles in excess of the total internal reflection critical angle, and further comprising a non-gain material region disposed in direct line between the end facets, so that all straight-path cavity modes pass through the non-gain region.