CAJ | 학술논문

分析了光非归零-差分正交相移键控（NRZ-DQPSK）、33％归零-差分正交相移键控（33％RZ-DQPSK）和载波抑制归零-差分正交相移键控（CSRZ-DQPSK）三种调制格式的频域特性。并数字仿真了40Gbit/s的单信道光纤系统中三种调制格式在对色散（CD）进行后补偿、预补偿和对称补偿等三种补偿方式及考虑偏振模色散（PMD ）和非线性效应情况下的传输性能。仿真结果表明，33％RZ-DQPSK对自相位调制（SPM）有最好的容忍度，但缓解PMD和CD的能力较弱；CSRZ-DQPSK在色散后补偿方式中对PMD和非线性效应具有最好的抑制能力。
분석료광비귀령-차분정교상이건공（NRZ-DQPSK）、33％귀령-차분정교상이건공（33％RZ-DQPSK）화재파억제귀령-차분정교상이건공（CSRZ-DQPSK）삼충조제격식적빈역특성。병수자방진료40Gbit/s적단신도광섬계통중삼충조제격식재대색산（CD）진행후보상、예보상화대칭보상등삼충보상방식급고필편진모색산（PMD ）화비선성효응정황하적전수성능。방진결과표명，33％RZ-DQPSK대자상위조제（SPM）유최호적용인도，단완해PMD화CD적능력교약；CSRZ-DQPSK재색산후보상방식중대PMD화비선성효응구유최호적억제능력。
The frequency domain characteristics of the optical Not-Return to Zero-Differential Quadrature Phase-Shift Key (NRZ-DQPSK),33% Return to Zero-DQPSK(33%RZ-DQPSK)and Carried Suppressed Return to Zero-DQPSK (CSRZ-DQPSK)modulation formats is analyzed.Considering the polarization mode dispersion (PMD)and nonlinear effect (self-phase modulation),the transmission performance of the three modulation formats is simulated in the pre-dispersion,post-dispersion and symmetrical-dispersion compensation systems in a 40Gbit/s single-channel optical fi-ber communication system.Simulation results show that the 33%RZ-DQPSK is good at tolerance of the self-phase modulation (SPM)but weak in the remission of PMD and CD.The CSRZ-DQPSK has the best ability to inhibit the PMD and nonlinear effect in the post-dispersion compensation system.