CAJ | 학술논문

偏振控制在光通信中是至关重要的技术,关系着通信系统的稳定性和误码率.本文提出一种基于双向Sagnac环工作方式的全光纤高速偏振控制方案,通过调节环中一个光纤电光相位调制器的相位差而精确控制光场偏振方向,并且实现了单个端口输出各种偏振态,无需后续耦合操作.相位控制精度为10?3 rad,最大消光比可达30 dB,工作速率可达2 GHz.由于本方案的精度、调制速度和稳定性都很高,并采用了器件简单、成本低廉的全光纤光路,易于集成,在量子保密通信等光通信领域中有很好的应用前景.
편진공제재광통신중시지관중요적기술,관계착통신계통적은정성화오마솔.본문제출일충기우쌍향Sagnac배공작방식적전광섬고속편진공제방안,통과조절배중일개광섬전광상위조제기적상위차이정학공제광장편진방향,병차실현료단개단구수출각충편진태,무수후속우합조작.상위공제정도위10?3 rad,최대소광비가체30 dB,공작속솔가체2 GHz.유우본방안적정도、조제속도화은정성도흔고,병채용료기건간단、성본저렴적전광섬광로,역우집성,재양자보밀통신등광통신영역중유흔호적응용전경.
@@@@Polarization control is of vital importance in optical communications, which can affect the stability and bit error rate of a system. We demonstrate an all-fiber high-speed polarization control scheme based on a bidirectional Sagnac ring. The polarization direction can be accurately controlled by adjusting the phase difference of an electro-optic fiber phase modulator in the ring, meanwhile it is realized that only a single beam port outputs different polarization states. The phase can be adjusted accuratly to 10?3 rad, giving an extinction ratio as high as 30 dB, and the modulation speed can reach 2 GHz. The system has excellent stability, and as the optical circuit consists of simple, low cost components which can be easily integrated, there are good prospects for its application in quantum cryptography and other optical communcations fields.