Patent ID: 7653106
Filing Date: 2010-01-26
Classification: H01S

Abstract:
1. A semiconductor laser apparatus comprising: a compound semiconductor member; in which a first conduction type first clad layer, an active layer, and a second conduction type second clad layer are disposed in this order above a compound semiconductor substrate, a second conduction type first semiconductor layer doped with an impurity at a concentration higher than that of the second clad layer and a first conduction type second semiconductor layer are disposed to a portion on the second clad layer, the first semiconductor layer and the second semiconductor layer are overlapped and each in a stripe shape, a first conduction type third semiconductor layer doped at a concentration lower than that of the second semiconductor layer is disposed, the third semiconductor layer surrounds the first and the second semiconductor layers and is disposed on the second clad layer, the first and the second semiconductor layers confine the current, and the portion of the first to third semiconductor layers constitutes a tunneling junction structure, a first electrode is disposed on the compound semiconductor substrate on the side opposite to the first clad layer of the compound semiconductor substrate, and the second and third electrodes are disposed on the third semiconductor layer and at positions spaced from the portion of the tunneling junction structure, a silicon optical waveguide in a stripe shape formed on an SOI (Silicon-On-Insulator) substrate in which a silicon layer is disposed by way of a buried oxide layer above a silicon member, and a silicon member in which fourth and fifth electrodes are spaced apart from each other for supplying a current to the active layer while being fixed to the second and third electrodes respectively, in which the second electrode and the fourth electrode are fixed and the third electrode and the fifth electrode are fixed and, in a case where they are fixed, at least a portion of the silicon optical waveguide and the third semiconductor layer are in contact with each other.