CAJ | 학술논문

采用单纤双向系统是实现光纤通信系统扩容的有效解决方案。文章提出了采用波长移位技术降低单纤双向传输系统中的反向瑞利散射的方案,并介绍了采用 OptiSystem仿真软件搭建的基于 QPSK(正交相移键控)调制方式的双向传输系统仿真模型。仿真结果表明：在最优发射功率为3 dBm、传输距离为360 km的情况下,双向传输系统比传统的单向传输系统Q值提高了1.5倍,误码率降低到10-170,同时,满足Q>6的最大传输距离可达1600 km。研究表明,单纤双向系统在传输容量相同的情况下,较之于传统单纤单向系统可以少用一根光纤,其传输性能也有所提升。
채용단섬쌍향계통시실현광섬통신계통확용적유효해결방안。문장제출료채용파장이위기술강저단섬쌍향전수계통중적반향서리산사적방안,병개소료채용 OptiSystem방진연건탑건적기우 QPSK(정교상이건공)조제방식적쌍향전수계통방진모형。방진결과표명：재최우발사공솔위3 dBm、전수거리위360 km적정황하,쌍향전수계통비전통적단향전수계통Q치제고료1.5배,오마솔강저도10-170,동시,만족Q>6적최대전수거리가체1600 km。연구표명,단섬쌍향계통재전수용량상동적정황하,교지우전통단섬단향계통가이소용일근광섬,기전수성능야유소제승。
Using a single-fiber bidirectional system is an effective solution to the capacity expansion of the fiber-optic communi-cation system and the simulation study of its performances is important to its practical applications.This paper presents an ef-fective scheme,i.e.using the wavelength shifting technology to lower the reverse Rayleigh scattering in the system and using OptiSystem to set up a simulation model for the QPSK modulation-based bidirectional transmission system.When the trans-mitting power is 3 dBm and the transmission distance is 360 km,the Q factor of the proposed system is improved by 1.5 times and the BER is reduced to 10-170 as compared with the traditional unidirectional WDM system.In addition,when the Q factor is over 6,the maximum transmission distance can reach 1 600 km.Research results show that when the transmission capacity is the same,the bidirectional system can reduce the use of one fiber and its transmission performance is also somewhat im-proved.