| 摘要 |
PURPOSE:To provide the optical wavelength multiplex transmission line, which is low-priced and is immune to vibrations, unnecessitating a synthesizer and a branching filter by using a light emitting element and a light receiving element with multiple wavelengths. CONSTITUTION:At a transmission part, an LED1 4 and an LED2 5 built in an LED 3 and provided with different center light emitting wavelengths are modulated by two different signals, and signal beams are simultaneously sent to one optical fiber 7. At a reception part, the signal beams are received by a PD1 10 and a PD2 11 built in a color sensor 9 and provided with different center sensitivity wavelengths, and a target signal is separately provided by subtracting the output signal and a signal passed through an attenuator or amplifiers 14 and 15 each other by using subtracters 16 and 17. |
