Patent ID: 6301033
Filing Date: 2001-10-09
Classification: H04J

Abstract:
An optical transmission equipment for sending and receiving an optical signal in time division via an optical fiber, wherein said optical transmission equipment comprises a combination of an optical transmission device for emitting light with a desired wavelength (.lambda.1) and sending transmission information to said optical fiber by said light and an optical receiving device for receiving reception information of light with the same wavelength (.lambda.1) as said desired wavelength, concatenates said optical transmission device and said optical receiving device on the same optical axis in the order of said optical transmission device and said optical receiving device beginning from the side of said optical fiber, and furthermore has a driver circuit for driving said optical transmission device and a bias tuning circuit for supplying a bias voltage for tuning the band gap of said optical transmission device via said driver circuit and electrically tuning and controlling said desired wavelength (.lambda.1) emitted from said optical transmission device, and said bias tuning circuit sets so that transmitted light with said desired wavelength (.lambda.1) is outputted to said optical fiber from said optical transmission device during optical transmission and sets so that received lights with the same wavelength as said wavelength supplied via said optical fiber and a wavelength (.lambda.2, .lambda.3) longer than said wavelength are led to said optical receiving device during optical reception.