| 摘要 |
A transmitter unit (100) comprises a semiconductor laser (101) as a carrier light exciting source, a biasing source (102) for providing the semiconductor laser a d.c. biasing current, an external modulator (105) for intensity-modulating an output light of the semiconductor laser according to a transmission signal and means (107; 210; 510; 701, 702, 703, 704) for causing the external modulator to output only the carrier light and either side-band light. A receiver unit (150) comprises a receiver (151) for square-law detecting the carrier light and the side-band light supplied from the transmitter unit to obtain an electric signal and a linear filter (152) for equalizing this electric signal. An optical communication apparatus capable of easily equalizing dispersion distortion caused in a transmission path (115) having a large dispersion from a light-intensity modulated light signal transmitted therethrough is constituted with such transmitter unit and such receiver unit. <IMAGE> |
