Methods for polarization control for vcsels

Details Methods for polarization control for vcsels Methods for polarization control for vcsels

H - Electricity

01

S

H01S 5/00 (2006.01) H01S 3/10 (2006.01)

Patent

CA 2556709

A vertical cavity surface emitting laser (VCSEL) (40) having strain or stress elements (41) added for stable polarization control. The elements may disturb the symmetrical stress of the VCSEL structure to induce stable polarization control of its output. Such elements may be attached to the top surface or the sides of the VCSEL (40), or may be inserted in some of the layers of the VCSEL (40) structure. Some elements may involve the removal of material from the sides of the VCSEL (40).

Cette invention concerne un laser à cavité verticale et à émission par la surface (VCSEL) auquel on a ajouté des éléments de contrainte ou de tension à des fins de stabilité de la commande de polarisation. Ces éléments peuvent perturber la tension symétrique de la structure VCSEL et induire une commande de polarisation stable de la sortie. De tels éléments peuvent être montés sur la surface supérieure ou sur les côtés du VCSEL, ou bien être insérés dans certaines couches de la structure VCSEL. Dans le cas de certains éléments, il faudra éventuellement retirer un partie du matériau sur le côtés du VCSEL.

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