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    • 5. 发明授权
    • Optical signal monitoring method and apparatus
    • 光信号监控方法及装置
    • US08824886B2
    • 2014-09-02
    • US13253016
    • 2011-10-04
    • Roberto MagriRaffaele CorsiniErnesto CiaramellaEmma MatarazzoAndrea Peracchi
    • Roberto MagriRaffaele CorsiniErnesto CiaramellaEmma MatarazzoAndrea Peracchi
    • H04B10/08H04B17/00H04B10/00
    • H04B10/2569
    • A method of monitoring a differential group delay (DGD) of an optical communications signal having a polarisation multiplexed modulation format is described. The method includes the operations of receiving a signal and performing analogue to digital conversion of the signal to generate a digitised signal corresponding to one polarisation of the signal and to generate another digitised signal corresponding to another polarisation of the signal, and applying a polarisation mode dispersion(PMD) compensation to each of the digitised signals. The method further includes the operations of obtaining an indication of the channel transfer function of the optical communications signal, determining a DGD in dependence on the indication of the channel transfer function, determining a delay between the PMD compensated digitised signals, subtracting the delay from the DGD to obtain a corrected DGD, and generating and transmitting a monitoring signal with an indication of the corrected DGD.
    • 描述了监视具有偏振复用调制格式的光通信信号的差分组延迟(DGD)的方法。 该方法包括接收信号并执行信号的模数转换以产生对应于信号的一个极化的数字化信号并产生对应于该信号的另一极化的另一个数字化信号的操作,以及施加偏振模色散 (PMD)补偿到每个数字化信号。 该方法还包括获得光通信信号的信道传递函数的指示的操作,根据信道传递函数的指示确定DGD,确定PMD补偿的数字化信号之间的延迟,减去从 DGD以获得校正的DGD,以及生成并发送具有校正的DGD的指示的监视信号。
    • 8. 发明授权
    • Parametric device for wavelength conversion
    • 用于波长转换的参数设备
    • US06867902B2
    • 2005-03-15
    • US10135772
    • 2002-05-01
    • Marco RomagnoliLuciano SocciRaffaele CorsiniMichele Midrio
    • Marco RomagnoliLuciano SocciRaffaele CorsiniMichele Midrio
    • G02B6/122G02F1/35G02F1/39
    • B82Y20/00G02B6/1225G02F1/3534G02F1/3544G02F1/395G02F2202/32
    • Device for performing a parametric process, comprising a substantially periodic photonic crystal structure comprising a plurality of unitary cells each comprising a first layer having a first refractive index n1 and a first length L1, a second layer having a second refractive index n2, with n1 different from n2, and a second length L2, a third layer having a third refractive index n3, with n3 different from n2, and a third length L3 and a fourth layer having a fourth refractive index n4, with n4 different from n1 and from n3, and a fourth length L4,  wherein at least one among the first, the second, the third and the fourth layers has a non-linearity of the χ2 or χ3 type; at least one of the following conditions is met:  a) n1 is different from n3;  b) n2 is different from n4;  c) L1 is different from L3;  d) L2 is different from L4; and n1, n2, n3, n4, L1, L2, L3, L4 have such values as to perform the parametric process in phase matching conditions.
    • 用于执行参数过程的装置,包括基本上周期性的光子晶体结构,其包括多个单元,每个单元包括具有第一折射率n1和第一长度L1的第一层,具有第二折射率n2的第二层,其中n1不同于 n2,第二长度L2,第三折射率n3,n3不同于n2的第三层,第三长度L3和第四折射率n4的第四层,n4与n3不同,n3不同 第四长度L4,其中第一,第二,第三和第四层中的至少一个具有chi2或chi3类型的非线性;满足以下条件中的至少一个:a)n1不同于n3; b)n2不同于n4; c)L1不同于L3; d)L2不同于L4; 和n1,n2,n3,n4,L1,L2,L3,L4具有在相位匹配条件下执行参数处理的值。