物理学报
物理學報
물이학보
2013年
11期
295-302
,共8页
林嘉川%席丽霞%张霞%田凤%梁晓晨%张晓光?
林嘉川%席麗霞%張霞%田鳳%樑曉晨%張曉光?
림가천%석려하%장하%전봉%량효신%장효광?
偏分复用系统%信道串扰%偏振模色散%偏分解复用
偏分複用繫統%信道串擾%偏振模色散%偏分解複用
편분복용계통%신도천우%편진모색산%편분해복용
polarization division multiplexing system%crosstalk%polarization mode dispersion%polarization de-multiplexing
本文建立了偏分复用系统中偏振模色散与信号偏振态变化引起信道串扰的数学模型,分析了偏振模色散对偏分复用信道射频功率的影响,并提出了适用于偏分复用系统的光域偏振模色散补偿与偏分解复用同时进行的方案:用信道的射频功率作为反馈控制信号,监测链路中偏振模色散和偏振态变化引起的信道串扰的大小,用改进的粒子群优化算法对偏振控制器进行自适应控制,同时完成偏振模色散补偿与偏分解复用.在112 Gb/s偏分复用-差分正交相移键控(PDM-DQPSK)传输系统中仿真验证了该方案的有效性.结果表明该方案可以使112 Gb/s-PDM-DQPSK传输系统完成自适应偏分解复用的同时,在1 dB的光信噪比代价下,使系统对偏振模色散的容忍度提高20 ps.
本文建立瞭偏分複用繫統中偏振模色散與信號偏振態變化引起信道串擾的數學模型,分析瞭偏振模色散對偏分複用信道射頻功率的影響,併提齣瞭適用于偏分複用繫統的光域偏振模色散補償與偏分解複用同時進行的方案:用信道的射頻功率作為反饋控製信號,鑑測鏈路中偏振模色散和偏振態變化引起的信道串擾的大小,用改進的粒子群優化算法對偏振控製器進行自適應控製,同時完成偏振模色散補償與偏分解複用.在112 Gb/s偏分複用-差分正交相移鍵控(PDM-DQPSK)傳輸繫統中倣真驗證瞭該方案的有效性.結果錶明該方案可以使112 Gb/s-PDM-DQPSK傳輸繫統完成自適應偏分解複用的同時,在1 dB的光信譟比代價下,使繫統對偏振模色散的容忍度提高20 ps.
본문건립료편분복용계통중편진모색산여신호편진태변화인기신도천우적수학모형,분석료편진모색산대편분복용신도사빈공솔적영향,병제출료괄용우편분복용계통적광역편진모색산보상여편분해복용동시진행적방안:용신도적사빈공솔작위반궤공제신호,감측련로중편진모색산화편진태변화인기적신도천우적대소,용개진적입자군우화산법대편진공제기진행자괄응공제,동시완성편진모색산보상여편분해복용.재112 Gb/s편분복용-차분정교상이건공(PDM-DQPSK)전수계통중방진험증료해방안적유효성.결과표명해방안가이사112 Gb/s-PDM-DQPSK전수계통완성자괄응편분해복용적동시,재1 dB적광신조비대개하,사계통대편진모색산적용인도제고20 ps.
A model of polarization mode dispersion (PMD) and state of polarization (SOP) variation induced coherent crosstalk is established in a polarization division multiplexing system. The properties of radio frequency power of one channel in the presence of PMD are investigated. A combined scheme of PMD compensation and polarization de-multiplexing in optical domain is proposed, which is based on monitoring of the feedback signal of RF power. A modified particle swarm optimization algorithm is also used for the adaptive polarization control. The validity of the PMD compensation and polarization de-multiplexing scheme proposed here is demonstrated in a 112Gb/s-PDM-DQPSK simulation system. Results show that the PMD tolerance of the transmission system is increased by 20 ps with 1 dB OSNR margin and the channel separation is accomplished as well.