Patent ID: 8098699
Filing Date: 2012-01-17
Classification: H01L,H01S

Abstract:
1. A semiconductor laser apparatus comprising: a first semiconductor laser device that has a first electrode and a second electrode; a second semiconductor laser device that has a first electrode and a second electrode; a third semiconductor laser device that has a first electrode and a second electrode; a conductive package that houses said first, second and third semiconductor laser devices; a first power supply pin provided in said package; a second power supply pin provided in said package; a third power supply pin provided in said package; a fourth power supply pin provided in said package; and a submount having an upper surface, wherein a first metallic layer, a second metallic layer and a third metallic layer are formed on the upper surface of said submount with a first gap formed between said first and second metallic layers and a second gap formed between said first and third metallic layers, said first semiconductor laser device is arranged on said first metallic layer such that a surface of said first semiconductor laser device on the first electrode side thereof faces said first metallic layer, said second semiconductor laser device is arranged on said second metallic layer such that a surface of said second semiconductor laser device on the first electrode side thereof faces said second metallic layer, said third semiconductor laser device is arranged on said third metallic layer such that a surface of said third semiconductor laser device on the first electrode side thereof faces said third metallic layer, said first semiconductor laser device is arranged between said second semiconductor laser device and said third semiconductor laser device in a first direction that is parallel to said upper surface, said first, second and third power supply pins are electrically isolated from said package, said first electrodes of said first, second and third semiconductor laser devices are electrically connected to said first, second and third power supply pins through said first, second and third metallic layers, respectively, and simultaneously electrically isolated from said package by said submount, said fourth power supply pin is electrically connected to said package, said second electrodes of said second and third semiconductor laser devices are electrically connected to said package, said first power supply pin is positioned above said submount, said second power supply pin is positioned on said second semiconductor laser device side with reference to said first semiconductor laser device in said first direction, and said third power supply pin is positioned on said third semiconductor laser device side with reference to said first semiconductor laser device in said first direction.