Patent ID: 6389192
Filing Date: 2002-05-14
Classification: G02B,H01S,H04B

Abstract:
A two-way optical transmission apparatus, comprising:a first light source device; and a second light source device, wherein said first light source device comprises: a first light source for outputting a light having a first wavelength; a first lens for converting the light having the first wavelength into a collimated beam; a first optical input/output terminal for receiving the light having the first wavelength and outputting a light having a second wavelength; a second lens for converting the light having the second wavelength into a collimated beam; a first optical filter, provided between said first lens and said second lens, for passing the light having the first wavelength, and reflecting the light having the second wavelength; and a first optical input terminal for receiving the light having the second wavelength, wherein said second light source device comprises: a second light source for outputting a light having a second wavelength; a third lens for converting the light having the second wavelength into a collimated beam; a second optical input/output terminal for receiving the light having the second wavelength and outputting a light having the first wavelength; a fourth lens for converting the light having the first wavelength into a collimated beam; a second optical filter, provided between said third lens and said fourth lens, for passing the light having the second wavelength, and reflecting the light having the first wavelength, and a second optical input terminal for receiving the light having the first wavelength; and said two-way optical transmission apparatus further comprises: a first receiving optics, connected to said first optical input terminal of said first light source device, for receiving and converting the light having the second wavelength into an electrical signal; a second receiving optics, connected to said second optical input terminal of said second light source device, for receiving and converting the light having the first wavelength into an electrical signal; and a transmission line optical fiber for connecting said first optical input/output terminal of said first optical transmission/reception device to said second optical input/output terminal of said second optical transmission/reception device, wherein said transmission line optical fiber comprises a rare earth doped optical fiber, and wherein said first optical input terminal couples said light having the first wavelength collected by said second lens with said light having the second wavelength on a surface of said rare earth doped optical fiber.