CAJ | 학술논문

首先分析了基于载波抑制归零码的光载波抑制归零-开关键控(CSRZ-OOK)、载波抑制归零-差分相移键控(CSRZ- DPSK)和载波抑制归零-差分正交相移键控(CSRZ- DQPSK)三种光调制格式的时域和频域特性，并数字仿真了其在40 Gbit/s单信道光纤系统中的传输性能。以Q值、眼图和误码率(BER)作为性能评价指标，研究了这三种调制格式对色散(CD)、偏振模色散(PMD)和非线性效应的抑制作用。结果表明：CSRZ- DQPSK相对于CSRZ- OOK、CSRZ- DPSK对色散、偏振模色散和非线性效应有非常好的容忍能力。
수선분석료기우재파억제귀령마적광재파억제귀령-개관건공(CSRZ-OOK)、재파억제귀령-차분상이건공(CSRZ- DPSK)화재파억제귀령-차분정교상이건공(CSRZ- DQPSK)삼충광조제격식적시역화빈역특성，병수자방진료기재40 Gbit/s단신도광섬계통중적전수성능。이Q치、안도화오마솔(BER)작위성능평개지표，연구료저삼충조제격식대색산(CD)、편진모색산(PMD)화비선성효응적억제작용。결과표명：CSRZ- DQPSK상대우CSRZ- OOK、CSRZ- DPSK대색산、편진모색산화비선성효응유비상호적용인능력。
The time and frequency domain characteristics of three types of modulation formats, Carrier﹣Suppressed Return to Zero﹣On Off Keying (CSRZ- OOK), Carrier﹣Suppressed Return to Zero﹣Differential Phase Shift Keying (CSRZ- DPSK) and Carrier﹣Suppressed Return to Zero﹣Differential Quadrature Phase Shift Keying (CSRZ- DQPSK) based on carrier﹣suppressed return to zero formats, were analyzed firstly and the transmission performance of the three types of modulation formats was simulated in 40 Gbit/s single channel optical fiber transmission system. The tolerance of the three types of modulation formats to chromatic dispersion (CD), polarization mode dispersion (PMD) and nonlinear effect was evaluated by means of Q value, eye diagrams and bit error rate (BER). The results show that CSRZ- DQPSK has very good tolerance to chromatic dispersion, polarization mode dispersion and nonlinear effect compared with CSRZ- OOK and CSRZ- DPSK.