Method and apparatus for measuring polarization-mode dispersion
    2.
    发明授权
    Method and apparatus for measuring polarization-mode dispersion 失效
    用于测量偏振模色散的方法和装置

    公开(公告)号:US06947129B1

    公开(公告)日:2005-09-20

    申请号:US10842495

    申请日:2004-05-11

    IPC分类号: G01M11/00 G01N21/00

    CPC分类号: G01M11/336

    摘要: Polarization-mode dispersion (PMD) of an optical device, i.e. fiber or component is effected by launching a first pump laser beam of a fixed wavelength, a probe laser beam with a second fixed wavelength and a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the other two beams into an optical device to generate three output signals which are input into a semiconductor optical amplifier to generate four-wave mixing (FWM) products. The average PMD of the device is computed by measuring the power of the FWM products versus the wavelength of the second pump laser beam.

    摘要翻译: 通过发射固定波长的第一泵激光束,具有第二固定波长的探针激光束和具有可变波长的第二泵浦激光束来实现光学装置即光纤或分量的偏振模色散(PMD) 将与其他两个光束正交的偏振方向转换成光学装置,以产生输入到半导体光放大器中以产生四波混频(FWM)产物的三个输出信号。 通过测量FWM产品的功率与第二泵浦激光束的波长来计算装置的平均PMD。

    Compact hybrid integrated optical dynamic channel equalizer
    3.
    发明授权
    Compact hybrid integrated optical dynamic channel equalizer 失效
    紧凑型混合集成光学动态通道均衡器

    公开(公告)号:US06917747B2

    公开(公告)日:2005-07-12

    申请号:US10372851

    申请日:2003-02-26

    CPC分类号: H04J14/0221 H04J14/02

    摘要: An integrated optical dynamic channel equalizer that can be employed to equalize the channel gain level in a WDM transmission line and monitor the optical channel performance. The device consists of a circulator, a dynamic gain equalizer chip and a controller. Due to the simplicity of the dynamic gain equalizer chip, which includes one 1×n multiplexer/demultiplexer, an n-channel variable optical attenuator array (VOA-n), a partially transparent dielectric reflective means and an n-channel detector array, the device is very compact and can be fabricated at low cost. By placing a quarter wave plate between the n-channel variable optical attenuator array and the partially transparent reflective means in the dynamic channel equalizer chip, the device can be rendered polarization insensitive.

    摘要翻译: 一种集成的光学动态信道均衡器,其可用于均衡WDM传输线中的信道增益电平并监视光信道性能。 该器件由循环器,动态增益均衡器芯片和控制器组成。 由于包括一个1xn多路复用器/解复用器,n沟道可变光衰减器阵列(VOA-n),部分透明介质反射装置和n沟道检测器阵列的动态增益均衡器芯片的简单性,器件是 非常紧凑,可以低成本制造。 通过在n沟道可变光衰减器阵列和动态通道均衡器芯片中的部分透明的反射装置之间放置四分之一波片,该装置可以使其偏振不敏感。

    Full-field optical coherence tomography and its application to multiple-layer information decoding
    4.
    发明授权
    Full-field optical coherence tomography and its application to multiple-layer information decoding 失效
    全场光学相干断层扫描及其在多层信息解码中的应用

    公开(公告)号:US07088454B2

    公开(公告)日:2006-08-08

    申请号:US10601548

    申请日:2003-06-24

    IPC分类号: G01B9/02

    摘要: A method of extracting a tomographic image of a layer within a body by optical coherence tomography, involves capturing three images, namely a non-interference background image, a first interference-fringe image of said layer, and a second interference-fringe image phase-shifted relative to the first interference-fringe image. The tomographic image is obtained by mathematically combining the three captured images. In a preferred embodiment random noise is removed by averaging and inter-layer effects are removed by applying a compensation function. This system is then used to extract the 2D cross-sectional images encoded in a multiple-layer information carrier.

    摘要翻译: 通过光学相干断层摄影技术提取身体内的层的断层图像的方法涉及拍摄三幅图像,即非干涉背景图像,所述层的第一干涉条纹图像和第二干涉条纹图像相位图像, 相对于第一干涉条纹图像移动。 通过数学地组合三个捕获的图像来获得断层图像。 在优选实施例中,通过平均去除随机噪声,并且通过应用补偿函数去除层间效应。 然后,该系统用于提取在多层信息载体中编码的2D横截面图像。

    Spectral coding by fluorescent semiconductor nanocrystals for document identification and security applications
    5.
    发明授权
    Spectral coding by fluorescent semiconductor nanocrystals for document identification and security applications 失效
    荧光半导体纳米晶体进行光谱编码,用于文件识别和安全应用

    公开(公告)号:US07077329B2

    公开(公告)日:2006-07-18

    申请号:US10601547

    申请日:2003-06-24

    IPC分类号: G06K19/06

    摘要: In a method of coding and retrieving information by using the unique emission properties of the semiconductor nanocrystals (quantum dots) for the identification of valuable documents, articles and objects, a carrier medium is prepared containing quantum dots selected to give the carrier medium defined fluorescent emission characteristics encoding predetermined information. The carrier medium is then applied to the object, preferably in the form of an ink.

    摘要翻译: 在通过使用用于识别有价值的文献,物品和物体的半导体纳米晶体(量子点)的独特发射特性来编码和检索信息的方法中,制备了载体介质,其包含选择的载体介质限定的荧光发射的量子点 编码预定信息的特征。 然后将载体介质施加到物体上,优选以墨水的形式。