CAJ | 학술논문

介绍了光差分正交相移键控(DQPSK)的调制和解调方式,对非归零码(NRZ),归零码(RZ)和载波抑制归零码(CSRZ)进行调制,研究40Gb/s高速传输系统中不同类型的光信号.使用色散补偿方式进行200km的模拟仿真,比较不同码型的传输特性.分析表明CS-RZ-DQPSK调制格式,具有更强的抗色散和偏振模色散能力,在较宽的入纤功率范围内取得最小的眼图张开代价.
개소료광차분정교상이건공(DQPSK)적조제화해조방식,대비귀령마(NRZ),귀령마(RZ)화재파억제귀령마(CSRZ)진행조제,연구40Gb/s고속전수계통중불동류형적광신호.사용색산보상방식진행200km적모의방진,비교불동마형적전수특성.분석표명CS-RZ-DQPSK조제격식,구유경강적항색산화편진모색산능력,재교관적입섬공솔범위내취득최소적안도장개대개.
The modulation and demodulation methods of the optical Differential Quadrature Phase Shift Key (DQPSK) and the different modulation formats including nonretum-to-zero(NRZ), return-to-zero (RZ), carri-er-suppressed retum-to-zero (CS-RZ) are introduced, studying the different optical signals in the 40Gb/s high speed transmission system. The system is simulated in 200km optical fiber by way of dispersion compensa-tion. It is showed that the ability of anti-dispersion and anti-PMD is better in the CS-RZ-DQPSK modulation format, and this format has the smallest eye-opening penalty (EOP) with a wider range of power into the opti-cal fiber.