| 摘要 |
PURPOSE:To provide an optical repeater and an element which have 2R and false 3R functions by using an optical nonlinear material which emits light having a new optical frequency by incidence of plural light beams. CONSTITUTION:An optical nonlinear materials 1 consisting of a semiconductor optical amplifier or an optical fiber, an optical resonator filter 2 which shuts in only light having a specific optical frequency and has the resonance frequency interval set to the value which is approximately equal to integer-fold or (1/(an integer))-fold transmission speed, an optical. modulator 3, and optical filters 4 and 5 are provided. A clock signal which is different from the transmission signal by the optical frequency but has the same repeat frequency as the transmission speed is generated by this optical nonlinear material 1, and the transmission signal is modulated by this clock signal, thereby constituting the optical repeater to have simple and extrahigh-speed optical repeating functions. Since the clock signal is extracted at an extrahigh speed, repeating functions such as timing reproducing, regenerative amplification, and waveform reproducing using this signal are realized without sacrificing the transmission speed. |
