| 摘要 |
An optical transmitter having a single optical source (10) coupled to a modulator (14) for providing an information modulated signal and an optical amplifier (13) for providing an amplified phase reference signal which signals are combined by a coupler (15) for onward transmission. Duplex operation of a travelling wave optical amplifier 13 facilitates the implementation of a coherent optical transceiver 22 with a single optical amplifier (13). A separate reference signal oscillator, therefore, is not required at a remote receiver. The bi-directional amplifier 13 also amplifies the incoming signal, removing the need for a separate dedicated amplifier before the receive (11). The transceiver may be adapted for homodyne or heterodyne operation. |
