Surface-emitting laser module, optical scanner device, and image forming apparatus

• Main Authors: SATO SHUNICHI, HARASAKA KAZUHIRO, ADACHI KAZUHIKO, SUGAWARA SATORU, ISHII TOSHIHIRO, OHBA YOSHIHIRO
• Format: Patent
• Language: English
• Published: 01.03.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CORRECTION OF TYPOGRAPHICAL ERRORS; DEVICES USING STIMULATED EMISSION; ELECTRICITY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; NANOTECHNOLOGY; PERFORMING OPERATIONS; PRINTING; SELECTIVE PRINTING MECHANISMS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; STAMPS; TRANSPORTING; TYPEWRITERS

A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.