Patent ID: 8194713
Filing Date: 2012-06-05
Classification: H01S

Abstract:
1. An optical semiconductor device comprising: a beam splitter that receives an input optical axis and splits the input optical axis into a first split axis and a second split axis; a first unit that is located on the first split axis of the beam splitter and has one or more optical components, an interval between a more distant end of the first unit and the beam splitter having a first length; a second unit that is located on the second split axis of the beam splitter and has one or more optical components, an interval between a more distant end of the second unit and the beam splitter having a second length larger than the first length; and an optical semiconductor element that is a wavelength tunable laser and has a first outputting end having a first output axis coupled optically to the input optical axis of the beam splitter, a second outputting end having a second output axis, and an optical gain, the first output axis of the optical semiconductor element and the first split axis of the beam splitter being on a common straight line, the first output axis of the optical semiconductor element and the second split axis of the beam splitter crossing at the beam splitter, the optical semiconductor element being inclined so that the second output axis is arranged away to a side of the second split axis from the first output axis.