Surface-emitting laser light source using two-dimensional...

Details Surface-emitting laser light source using two-dimensional... Surface-emitting laser light source using two-dimensional...

H - Electricity

01

S

H01S 5/183 (2006.01)

Patent

CA 2558225

A surface-emitting laser light source for generating a linearly polarized laser beam having a single-peak beam profile where the intensity at and near the center is the highest. A two-dimensional photonic crystal where a vacancy (311 or 312) is made in a plate (31) and arranged in a tetragonal lattice is disposed on one side of an active layer (23). The planar shape (surface B) of the vacancies (311, 312) shown on the plan view on the emission side is smaller than the planar shape (surface C) on the active layer side. The position of the center of gravity of the planar shape of surface B is apart in the in-plane direction from that of the planer shape of surface C. With this, the symmetry in the plane of the two-dimensional photonic crystal is degraded, and a linearly-polarized single-peak laser beam can be generated.

Une source de lumière au laser à émission par la surface pour produire un rayon laser polarisé linéairement ayant un profil de rayon à simple pic où l'intensité près et sur le centre est maximale. Un cristal photonique à deux dimensions où une lacune (311 ou 312) est aménagée dans un plateau (31) et disposée en réseau quadratique est installé sur l'un des côtés d'une couche active (23). La forme plane (surface B) des lacunes (311, 312) visibles sur la vue en plan du côté émetteur est plus petite que la forme plane (surface C) du côté de la couche active. La position du centre de gravité de la forme planaire de la surface B est séparée dans la direction du plan de celle de la forme planaire de la surface C. En outre, la symétrie dans le plan du cristal photonique à deux dimensions est dégradée, et un rayon laser à simple pic linéairement polarisé et un rayon laser à simple pic linéairement polarisé peut être produit.

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