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    GENERATOR OF PHOTON PAIRS USING PARAMETRIC FLUORESCENCE
    3.
    发明申请
    GENERATOR OF PHOTON PAIRS USING PARAMETRIC FLUORESCENCE 审中-公开
    使用参数荧光的光子对发生器

    公开(公告)号：WO2005008952A8

    公开(公告)日：2005-06-02

    申请号：PCT/IB2004002344

    申请日：2004-07-21

    Applicant: ELSAG SPA ,  BOVINO FABIO ANTONIO

    Inventor： BOVINO FABIO ANTONIO

    IPC: G02F1/21 ,  G02F1/39 ,  H04L9/08 ,  G02F3/00

    CPC classification number: G02F1/21 ,  G02F1/39

    Abstract: A high-efficiency generator for generating pairs of photons, having a type-one crystal (3) receiving a laser pump beam at the input and generating pairs of photons of like polarization at the output; a first and a second polarization rotator (20a, 20b), which respectively receive the photons in each generated pair; a beam splitter (17), which reflects one polarization at its inputs, and transmits the other polarization; and conveying mirrors for directing the photons from the first and second polarization rotator (20a, 20b) to the inputs of the beam splitter (17). The state of the photons at the outputs of the beam splitter (17) has a Bell state which may be used, for example, in a quantum cryptography process.

    Abstract translation: 一种用于产生成对的光子的高效率发生器，具有在输入处接收激光泵浦光束的一级晶体（3），并在输出处产生相似极化的光子对; 分别在每个产生的对中接收光子的第一和第二偏振旋转器（20a，20b） 分束器（17），其在其输入处反射一个偏振，并透射另一个极化; 以及用于将光子从第一和第二偏振旋转器（20a，20b）引导到分束器（17）的输入的传送反射镜。 分束器（17）的输出处的光子的状态具有Bell状态，该状态例如可以用在量子密码处理中。

    METHOD AND SYSTEM FOR DETERMINING SECOND-ORDER NONLINEAR OPTICAL COEFFICIENTS
    4.
    发明申请
    METHOD AND SYSTEM FOR DETERMINING SECOND-ORDER NONLINEAR OPTICAL COEFFICIENTS 审中-公开
    用于确定二阶非线性光学系数的方法和系统

    公开(公告)号：WO2010113190A8

    公开(公告)日：2011-01-27

    申请号：PCT/IT2009000131

    申请日：2009-03-31

    Applicant: SELEX SISTEMI INTEGRATI SPA ,  BOVINO FABIO ANTONIO ,  LARCIPRETE MARIA CRISTINA ,  GIARDINA MAURIZIO ,  SIBILIA CONCITA

    Inventor： BOVINO FABIO ANTONIO ,  LARCIPRETE MARIA CRISTINA ,  GIARDINA MAURIZIO ,  SIBILIA CONCITA

    IPC: G02F1/35 ,  G01N21/63

    CPC classification number: G02F1/3532 ,  G01N21/21 ,  G01N21/41 ,  G01N21/636

    Abstract: Described herein is a method for determining second- order nonlinear optical coefficients of a material. The method envisages the steps of providing a specimen (1;35) made at least in part of the material, causing a first optical signal (Si1) and a second optical signal (Si2) having, respectively, a first pulsation and a second pulsation, and a first polarization state and a second polarization state, to impinge upon the specimen in such a way that the specimen generates a second-harmonic optical signal (su3) having a third pulsation equal to the sum of the first and second pulsations, and a third polarization state that is a function of the first and second polarization states. The method further envisages the step of determining a plurality of measurements of power corresponding to the second-harmonic optical signal, and the step of determining the second-order nonlinear optical coefficients on the basis of the plurality of measurements of power. In addition, the method envisages performing a plurality of measurements of power of the second-harmonic optical signal as the first polarization state and the second polarization state vary.

    Abstract translation: 这里描述了一种用于确定材料的二阶非线性光学系数的方法。 该方法设想提供至少部分材料制成的样品（1; 35）的步骤，产生分别具有第一脉动和第二脉动的第一光信号（Si1）和第二光信号（Si2） 以及第一偏振态和第二偏振态，以使样本产生具有等于第一和第二脉动的和的第三脉动的二次谐波光信号（su3）的方式撞击在样本上，以及 第三极化状态，其是第一和第二极化状态的函数。 该方法进一步设想了确定对应于二次谐波光信号的多个功率测量的步骤，以及基于多次功率测量来确定二阶非线性光学系数的步骤。 此外，该方法设想当第一偏振态和第二极化状态变化时执行二次谐波光信号的功率的多个测量。

    GENERATOR OF PHOTON PAIRS USING PARAMETRIC FLUORESCENCE
    5.
    发明申请
    GENERATOR OF PHOTON PAIRS USING PARAMETRIC FLUORESCENCE 审中-公开
    使用参数荧光的光子对发生器

    公开(公告)号：WO2005008952A1

    公开(公告)日：2005-01-27

    申请号：PCT/IB2004/002344

    申请日：2004-07-21

    Applicant: ELSAG SPA ,  BOVINO, Fabio, Antonio

    Inventor： BOVINO, Fabio, Antonio

    IPC: H04L9/08

    CPC classification number: G02F1/21 ,  G02F1/39

    Abstract: A high-efficiency generator for generating pairs of photons, having a type-one crystal (3) receiving a laser pump beam at the input and generating pairs of photons of like polarization at the output; a first and a second polarization at the output; a first and a second polarization at the rotator (20a, 20b), which respectively receive the photons in each generated pair; a beam splitter (17), which reflects one polarization at its inputs, and transmits the other polarization; and conveying mirrors for directing the photons from the first and second polarization rotator (20a, 20b) to the inputs of the beam splitter (17). The state of the photons at the outputs of the beam splitter (17) has a Bell state which may be used, for example, in a quantum cryptography process.

    Abstract translation: 一种用于产生成对的光子的高效率发生器，具有在输入处接收激光泵浦光束的一级晶体（3），并在输出处产生相似极化的光子对; 输出端的第一和第二极化; 旋转器（20a，20b）处的第一和第二极化分别在每个生成的对中接收光子; 分束器（17），其在其输入处反射一个偏振，并透射另一个极化; 以及用于将光子从第一和第二偏振旋转器（20a，20b）引导到分束器（17）的输入的传送反射镜。 分束器（17）的输出处的光子的状态具有Bell状态，该状态例如可以用在量子密码处理中。

    METHOD AND DEVICE FOR SYNCHRONIZING AND ACQUIRING TWIN PHOTONS FOR A QUANTUM CRYPTOGRAPHY PROCESS
    7.
    发明申请
    METHOD AND DEVICE FOR SYNCHRONIZING AND ACQUIRING TWIN PHOTONS FOR A QUANTUM CRYPTOGRAPHY PROCESS 审中-公开
    用于同步和获取二次光子用于量子压缩过程的方法和装置

    公开(公告)号：WO2005091548A1

    公开(公告)日：2005-09-29

    申请号：PCT/IB2005/000639

    申请日：2005-03-11

    Applicant: ELSAG SPA ,  BOVINO, Fabio, Antonio ,  VARISCO, Pietro ,  DE NICOLO, Paolo

    Inventor： BOVINO, Fabio, Antonio ,  VARISCO, Pietro ,  DE NICOLO, Paolo

    IPC: H04L9/08

    CPC classification number: H04L9/12 ,  H04L9/0858

    Abstract: A synchronizing method for a quantum cryptography process including the steps of: supplying a first/second photon in an entangled pair (7) to a first/second receiving station (4, 5); comparing, at each receiving station, the polarization of each received photon with a randomly selected first reference base or second reference base; measuring, at each receiving station (4, 5), the time difference ΔT between the acquisition instant t n of one photon and the acquisition instant t n-1 of the preceding received photon; and recognizing a pair of twin photons when the time difference ΔT a measured at a first receiving station (4) and the corresponding time difference ΔT b measured at a second receiving station (5) substantially coincide.

    Abstract translation: 一种用于量子加密处理的同步方法，包括以下步骤：将纠缠对（7）中的第一/第二光子提供给第一/第二接收站（4,5）; 在每个接收站处将每个接收光子的极化与随机选择的第一参考基准或第二参考基准进行比较; 在每个接收站（4,5）处测量一个光子的获取时刻tn与前一个接收光子的获取时刻tn-1之间的时差DeltaT; 以及当在第一接收站（4）处测量的时差DeltaTa和在第二接收站（5）处测量的对应时间差ΔTb基本上一致时，识别一对双光子。

    DEVICE FOR THE GENERATION OF ENTANGLED PHOTONS AND THEIR WEIGHTED DISTRIBUTION AMONG FOUR USERS
    8.
    发明申请
    DEVICE FOR THE GENERATION OF ENTANGLED PHOTONS AND THEIR WEIGHTED DISTRIBUTION AMONG FOUR USERS 审中-公开
    用于生成照明光子的设备及其四个用户的称重分配

    公开(公告)号：WO2005008953A8

    公开(公告)日：2005-07-28

    申请号：PCT/IB2004002346

    申请日：2004-07-21

    Applicant: ELSAG SPA ,  BOVINO FABIO ANTONIO

    Inventor： BOVINO FABIO ANTONIO

    IPC: G02F1/39 ,  H04L9/08

    CPC classification number: H04L9/0858 ,  G02F1/39

    Abstract: A device for generation and weighted distribution of entangled photons between four users wherein a type-two crystal (3) receives a laser beam (12) to generate pairs of photons (f) of opposite polarizations by parametric down-conversion. Conveying mirrors (14a, 14b) are provided to reflect then generated photons to first and second inputs (17a, 17b) of a beam splitter (17), which transmit a percentage ||alpha|| of the input signal to first and second outputs (17c, 17d), and reflect the rest ||beta|| = 1 - ||alpha|| of the signal along directions (c) and (d).

    Abstract translation: 一种用于在四个用户之间产生和加权分配纠缠光子的装置，其中二型晶体（3）接收激光束（12）以通过参数下变频产生具有相反极化的光子对（f）。 提供输送反射镜（14a，14b）以将所生成的光子反射到分束器（17）的第一和第二输入（17a，17b），其将输入信号的百分比|| || 2传递到第一 和第二输出（17c，17d），并沿方向（c）和（d）反映信号的其余部分||β|| 2 = 1 - ||α|| 2。

    DEVICE FOR THE GENERATION OF ENTANGLED PHOTONS AND THEIR WEIGHTED DISTRIBUTION AMONG FOUR USERS
    9.
    发明申请
    DEVICE FOR THE GENERATION OF ENTANGLED PHOTONS AND THEIR WEIGHTED DISTRIBUTION AMONG FOUR USERS 审中-公开
    用于生成照明光子的设备及其四个用户的称重分配

    公开(公告)号：WO2005008953A1

    公开(公告)日：2005-01-27

    申请号：PCT/IB2004/002346

    申请日：2004-07-21

    Applicant: ELSAG SPA ,  BOVINO, Fabio, Antonio

    Inventor： BOVINO, Fabio, Antonio

    IPC: H04L9/08

    CPC classification number: H04L9/0858 ,  G02F1/39

    Abstract: A device for generation and weighted distribution of entangled photons between four users wherein a type-two crystal (3) receives a laser beam (12) to generate pairs of photons (f) of opposite polarizations by parametric down-conversion. Conveying mirrors (14a, 14b) are provided to reflect then generated photons to first and second inputs (17a, 17b) of a beam splitter (17), which transmit a percentage α? 2 of the input signal to first and second outputs (17c, 17d), and reflect the rest β? 2 = 1 - α? 2 of the signal along directions (c) and (d).

    Abstract translation: 一种用于在四个用户之间产生和加权分配纠缠光子的装置，其中二型晶体（3）接收激光束（12）以通过参数下变频产生具有相反极化的光子对（f）。 提供输送反射镜（14a，14b）以将所生成的光子反射到分束器（17）的第一和第二输入（17a，17b），其将输入信号的百分比α<< 2>传送到第一和第二输出 （17c，17d），并沿着方向（c）和（d）反映信号的其余部分β？2 = 1-α2 <2。

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