| 摘要 |
PURPOSE: To provide an optical amplification and transmission system which reduces the ASE and, as a result, improves the S/N of signals received by means of a receiver. CONSTITUTION: In an optical amplification and transmission system incorporating an optical transmitter 10 having a laser source 10a and a first modulator 10b which modulates input data, an optical transmission path 12 having cascade- connected optical amplifiers 13, and an incoherent optical receiver 11 which receives transmitted signals through the path 12, a second modulator (polarized light modulator) 10c which is connected to the first modulator 10b and modulates the output of the modulator 10b in a pair of nearly orthogonal polarized states is incorporated. |
