研究了IP over WDM网络中IP业务流量的突发性对底层光脉冲传输的影响。突发的IP业务流量使WDM网络中传输信号的信道数目服从泊松分布,在非线性薛定谔方程(NLSE)的基础上进行IP流量分析,通过数值计算,考查了IP业务流量对四波混频(FWM)和...研究了IP over WDM网络中IP业务流量的突发性对底层光脉冲传输的影响。突发的IP业务流量使WDM网络中传输信号的信道数目服从泊松分布,在非线性薛定谔方程(NLSE)的基础上进行IP流量分析,通过数值计算,考查了IP业务流量对四波混频(FWM)和交叉相位调制(XPM)的综合影响,得到了不同输入光功率、不同流量负荷下的眼图。结果表明,40信道的WDM网络中,当输入信号光功率大于5 dBm时,IP流量负荷的改变将会对网络性能产生剧烈的影响。同时,通过公式计算出FWM功率、比特误码率与输入光功率、流量负荷、信道间隔的关系,突出强调了不同信道分布对探测信道FWM效应的不同影响。展开更多
Experimental implementations of continuous optical time domain Fourier transformation based on time lenses and optical orthogonal frequency-division multiplexing （OFDM） system are carried out. Such a system is verif...Experimental implementations of continuous optical time domain Fourier transformation based on time lenses and optical orthogonal frequency-division multiplexing （OFDM） system are carried out. Such a system is verified through 100-kin transmission of 10-Gb/s non-return-to-zero （NRZ） intensity-modulated direct-detection （IM-DD） without any dispersion compensation. The system＇s bit error rate （BER） and power penalty are 10 12 and 4 dBm, respectively.展开更多
The analytical expression of bit error probability in a balanced differential phase-shift keying(DPSK) optical receiver considering nonlinear phase noise and EDFA ASE noise is given,which is very useful to estimate th...The analytical expression of bit error probability in a balanced differential phase-shift keying(DPSK) optical receiver considering nonlinear phase noise and EDFA ASE noise is given,which is very useful to estimate the performance of DPSK balanced and unbalanced receiver in optical communication system.Through analysis,if only nonlinear phase noise is considered,both the balance and unbalanced receivers have the same performances.But if adding the ASE noise of EDFA,the balanced receiver is better.展开更多
文摘研究了IP over WDM网络中IP业务流量的突发性对底层光脉冲传输的影响。突发的IP业务流量使WDM网络中传输信号的信道数目服从泊松分布,在非线性薛定谔方程(NLSE)的基础上进行IP流量分析,通过数值计算,考查了IP业务流量对四波混频(FWM)和交叉相位调制(XPM)的综合影响,得到了不同输入光功率、不同流量负荷下的眼图。结果表明,40信道的WDM网络中,当输入信号光功率大于5 dBm时,IP流量负荷的改变将会对网络性能产生剧烈的影响。同时,通过公式计算出FWM功率、比特误码率与输入光功率、流量负荷、信道间隔的关系,突出强调了不同信道分布对探测信道FWM效应的不同影响。
基金supported by the National Basic Research Program of China(No.2010CB328300)the National Natural Science Foundation of China(No. 60772013)the Open Fund of Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications
文摘Experimental implementations of continuous optical time domain Fourier transformation based on time lenses and optical orthogonal frequency-division multiplexing （OFDM） system are carried out. Such a system is verified through 100-kin transmission of 10-Gb/s non-return-to-zero （NRZ） intensity-modulated direct-detection （IM-DD） without any dispersion compensation. The system＇s bit error rate （BER） and power penalty are 10 12 and 4 dBm, respectively.
基金supported by the National Natural Science Foundation of China (No.60772013)the Fund of Huazhong Uiversity of Science and Technology (2006M041)
文摘The analytical expression of bit error probability in a balanced differential phase-shift keying(DPSK) optical receiver considering nonlinear phase noise and EDFA ASE noise is given,which is very useful to estimate the performance of DPSK balanced and unbalanced receiver in optical communication system.Through analysis,if only nonlinear phase noise is considered,both the balance and unbalanced receivers have the same performances.But if adding the ASE noise of EDFA,the balanced receiver is better.
