Invention Grant
US08855159B2 Surface-emitting laser element, surface-emitting laser array, optical scanner device, and image forming apparatus 有权
表面发射激光元件,表面发射激光器阵列,光学扫描器装置和图像形成装置

Surface-emitting laser element, surface-emitting laser array, optical scanner device, and image forming apparatus
Abstract:
A disclosed surface-emitting laser element includes a resonator structure having an active layer, a first semiconductor multilayer mirror and a second semiconductor multilayer mirror configured to sandwich the resonator structure having the active layer, an electrode provided around an emission region of a light-emitting surface, and a dielectric film provided in a peripheral portion within the emission region and outside a central portion of the emission region to make a reflectance of the peripheral portion lower than a reflectance of the central portion. In the surface-emitting laser element, an outer shape of a portion where the electrode provided around the emission region of the light-emitting surface is in contact with a contact layer includes corners.
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