Research on High Stable Frequency Signal Transmission Technology Based on Aerial Optical Cable
In order to solve the phase noise deterioration caused by large shaking amplitude and drastic temperature changes of o-verhead optical cable,a fiber frequency transmission scheme based on electronic phase compensation is designed by using bidirectional transmission and pre-compensation technology.The frequency transmission test is carried out on the actual link containing 30 km o-verhead optical cable with a total length of 133 km.Compared with the unidirectional transmission scheme,the bidirectional transmis-sion scheme improves the phase noise index by 28 dB.The bidirectional transmission fiber frequency transmission technology is used to make a comparison test between the overhead optical cable and the 133 km buried optical cable,and the transmission of the over-head optical cable deteriorates by 4 dB under the level 5 wind,which can meet the needs of frequency transmission under the overhead optical cable.On-site test results show that the optical frequency transfer technology based on electronic phase conjugation can opti-mize the phase noise of frequency signals transmitted by overhead optical cables,and provide a support for the multi-station synchroni-zation scheme of distributed radar,distributed time-keeping system,and space telemetry and control system.
万方数据
维普
