Patent ID: 8311073

Claim:
A semiconductor laser comprising: a substrate; a first semiconductor multilayer reflector of a first conductive type formed on the substrate; an active region formed on the first semiconductor multilayer reflector; a second semiconductor multilayer reflector of a second conductive type formed on the active region; a third semiconductor multilayer reflector of a first conductive type or a second conductive type on the substrate; and an intermediate semiconductor layer of a first conductive type or a second conductive type formed between the first semiconductor multilayer reflector and the third semiconductor multilayer reflector, or between the second semiconductor multilayer reflector and the third semiconductor multilayer reflector; wherein an oxidized region formed by oxidizing a part of the intermediate semiconductor layer and an un-oxidized region contacting with the oxidized region are formed in the intermediate semiconductor layer, the un-oxidized region is electrically connected to the first or second semiconductor multilayer reflector, and a beam generated in the active region is reflected at a boundary between the oxidized region and the un-oxidized region to a direction parallel to a principal surface of the substrate, and is emitted from a side surface of the intermediate semiconductor layer.