红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2013年
z2期
481-484
,共4页
徐盛晨%喻松%柯超凡%顾畹仪
徐盛晨%喻鬆%柯超凡%顧畹儀
서성신%유송%가초범%고원의
相干%相位%补偿%FPGA%检测
相榦%相位%補償%FPGA%檢測
상간%상위%보상%FPGA%검측
coherent%phase%compensation%FPGA%detection
相位漂移一直是相干光通信系统实施过程中需克服的关键问题之一。在弄清了该问题的根本原因后，给出了一个自动补偿算法，用于减轻相位漂移对光链路中传输的光脉冲所产生的不利影响。基于理论研究和实验分析，用先进的硬件技术实现了自动补偿模块，并将其集成到早起搭建的相干光通信系统中。相比于之前相位随机抖动的情况，目前相位可被完全补偿。实验结果显示，当采用了笔者提出的为原始数据周期性地添加同步和训练序列的方法后，才可计算反馈信号，该反馈信号输入到相位调制器的控制输入端来稳定光脉冲的相位，并使得接收端的数据采集和恢复成为可能。
相位漂移一直是相榦光通信繫統實施過程中需剋服的關鍵問題之一。在弄清瞭該問題的根本原因後，給齣瞭一箇自動補償算法，用于減輕相位漂移對光鏈路中傳輸的光脈遲所產生的不利影響。基于理論研究和實驗分析，用先進的硬件技術實現瞭自動補償模塊，併將其集成到早起搭建的相榦光通信繫統中。相比于之前相位隨機抖動的情況，目前相位可被完全補償。實驗結果顯示，噹採用瞭筆者提齣的為原始數據週期性地添加同步和訓練序列的方法後，纔可計算反饋信號，該反饋信號輸入到相位調製器的控製輸入耑來穩定光脈遲的相位，併使得接收耑的數據採集和恢複成為可能。
상위표이일직시상간광통신계통실시과정중수극복적관건문제지일。재롱청료해문제적근본원인후，급출료일개자동보상산법，용우감경상위표이대광련로중전수적광맥충소산생적불리영향。기우이론연구화실험분석，용선진적경건기술실현료자동보상모괴，병장기집성도조기탑건적상간광통신계통중。상비우지전상위수궤두동적정황，목전상위가피완전보상。실험결과현시，당채용료필자제출적위원시수거주기성지첨가동보화훈련서렬적방법후，재가계산반궤신호，해반궤신호수입도상위조제기적공제수입단래은정광맥충적상위，병사득접수단적수거채집화회복성위가능。
Phase drift has always been a serious problem in the implementation process of optical coherent-detection systems . Recognizing the root causes of this problem , an auto-compensation algorithm was proposed , aiming at reducing the negativeimpact of phase drift on light pulses transmitting through optic links . Based on theoretical analysis and practical research , the auto-compensation moduleusing advanced hardware was realized , and integrate it into the optical coherent-detection system we built earlier for experiment use . Compared with the previous scenario in with the phase changed randomly , it can now be compensated completely . The experimental result shows that after adopting the proposed method that inserts synchronization and training sequences into the raw data periodically , the authors are now able to calculate the feedback signal , which is applied to the control input of phase modulator , to stabilize the phase of light pulses , thus enabling data acquisition and recovery on the receiver side .
