Polarization-stable surface-emitting laser diode

摘要

The present invention relates to a surface-emitting laser diode with an active amplifying region (2) which is bounded by two laser mirrors (1, 3), while one or more polarization-selective layers (4) are provided for stabilizing the polarization in a region that is located on that side of at least one of the laser mirrors (1, 3) that is opposite the active amplifying region (2), these layers (4) extending parallel to the respective mirror (1; 3) and having a polarization-dependent refractive index and/or absorption.

主权项

1. A surface-emitting laser diode comprising:
an active amplifying region having a resonator length, wherein the active amplifying region is bounded by two laser mirrors that determine the resonator length, while a plurality of polarization-selective layers is provided for stabilizing the polarization in a region that is located on that side of at least one of the laser mirrors that is opposite the active amplifying region, these layers extending parallel to the respective mirror and having a polarization-dependent refractive index, the plurality of polarization-selective layers each being alternately rotated through 90° relative to their polarization alignment and their reflection phase being the same as that of the laser mirror on the side of which they are located for one polarization and opposite it for the other polarization.