激光技术
激光技術
격광기술
Laser Technology
2015年
6期
756-760
,共5页
量子光学%量子密钥分配%反馈控制%偏振编码%非线性偏振%偏振抖动
量子光學%量子密鑰分配%反饋控製%偏振編碼%非線性偏振%偏振抖動
양자광학%양자밀약분배%반궤공제%편진편마%비선성편진%편진두동
quantum optics%quantum key distribution%feedback control%polarization encode%nonlinear polarization%polarization jitter
受传输光纤非线性偏振影响，量子密钥分配系统本振光与信号光耦合率下降，使形成偏振复用信号的抖动增强，系统的稳定性和安全性下降。为了提高量子光学中偏振编码技术的性能，经过理论分析和数值模拟，给出可操作性的实验方案，解决了光纤非线性偏振耦合导致的偏振抖动问题。结果表明，在同等条件下，以分光检测结果反馈控制本振光和信号光的非线性偏振耦合率，可增强偏振复用信号的稳定性，将系统传输容量提高61％。该结果有利于偏振编码技术在量子密钥分配系统的实际应用。
受傳輸光纖非線性偏振影響，量子密鑰分配繫統本振光與信號光耦閤率下降，使形成偏振複用信號的抖動增彊，繫統的穩定性和安全性下降。為瞭提高量子光學中偏振編碼技術的性能，經過理論分析和數值模擬，給齣可操作性的實驗方案，解決瞭光纖非線性偏振耦閤導緻的偏振抖動問題。結果錶明，在同等條件下，以分光檢測結果反饋控製本振光和信號光的非線性偏振耦閤率，可增彊偏振複用信號的穩定性，將繫統傳輸容量提高61％。該結果有利于偏振編碼技術在量子密鑰分配繫統的實際應用。
수전수광섬비선성편진영향，양자밀약분배계통본진광여신호광우합솔하강，사형성편진복용신호적두동증강，계통적은정성화안전성하강。위료제고양자광학중편진편마기술적성능，경과이론분석화수치모의，급출가조작성적실험방안，해결료광섬비선성편진우합도치적편진두동문제。결과표명，재동등조건하，이분광검측결과반궤공제본진광화신호광적비선성편진우합솔，가증강편진복용신호적은정성，장계통전수용량제고61％。해결과유리우편진편마기술재양자밀약분배계통적실제응용。
Because of the effect of nonlinear polarization of transmission fiber , coupling ratio between local oscillator and quantum signal in a quantum key distribution system is decreased , signal jitters which leads to polarization multiplexing is increased, and security and stability of the system are decreased .To enhance technical performance of polarization encodement of quantum optics , after theoretical analysis and numerical simulation , operational experiment scheme was proposed to solve the polarization jitters caused by nonlinear polarization coupling of fiber .The results show that signal stability of polarization multiplexing enhances and transmission capacity of quantum key distribution increases to 61%by using feedback of spectral test results to control fiber nonlinear polarization coupling ratio between local oscillator and quantum signal .The research is helpful for practical application of polarization coding technology in quantum key distribution .
