Patent ID: 7460749
Filing Date: 2008-12-02
Classification: G02B

Abstract:
1. An optical transmission device comprising: a single chip light source including light-emitting regions; and an optical fiber that transmits lights emitted from the light-emitting regions, the single chip light source including a first light-emitting region positioned at a place that corresponds to an optical axis of the optical fiber, and a second light-emitting region positioned at places that surround the first light-emitting region; a light emitted from the first light-emitting region entering a first core of a first optical fiber having a first core diameter, in a case where the first optical fiber is connected to the optical transmission device, lights emitted from the first and second light-emitting regions entering a second core of a second optical fiber having a second core diameter greater than the first core diameter when the second optical fiber is connected to the optical transmission device; and an antireflection film provided in an area other than the first core on an incident surface of the first optical fiber, the light emitted from the second light-emitting region enters the antireflection film when the first optical fiber is connected to the optical transmission device, wherein the first light-emitting region and the second light-emitting region emit lights of an identical wavelength.