Method and apparatus for detecting natural modes of vibration of an eye by laser interferometry, and an application thereof to measuring intraocular pressure
    1.
    发明授权
    Method and apparatus for detecting natural modes of vibration of an eye by laser interferometry, and an application thereof to measuring intraocular pressure 失效
    用于通过激光干涉测量来检测眼睛的自然振动模式的方法和装置,以及其用于测量眼内压的方法和装置

    公开(公告)号:US07441898B2

    公开(公告)日:2008-10-28

    申请号:US10398673

    申请日:2001-10-09

    IPC分类号: A61B3/10

    CPC分类号: A61B3/165

    摘要: The eye is positioned relative to a detection device in such a manner as to co-operate with the device to form a Fabry-Perot cavity having a main optical axis and comprising two opposite reflecting faces on the main optical axis, one of these two faces being constituted by a stationary reflecting element and the other being formed by the cornea of the eye. An incident laser beam is injected into said cavity so as to be centered on the main optical axis of the Fabry-Perot cavity, the cornea is aligned laterally and longitudinally relative to the main optical axis in such a manner as to obtain longitudinal interference between the go and the return laser beams reflected between the two reflecting faces of the cavity, and an optoelectronic detector is used to detect the intensity I of said interference as a function of time. The invention is applicable to measuring intraocular pressure.

    摘要翻译: 眼睛相对于检测装置定位成与装置协作以形成具有主光轴的法布里 - 珀罗腔,并且在主光轴上包括两个相对的反射面,这两个面之一 由静止反射元件构成,另一个由眼睛的角膜形成。 将入射激光束注入所述空腔中以便在法布里 - 珀罗腔的主光轴上居中,使角膜相对于主光轴横向和纵向排列,以获得纵向干涉 以及在空腔的两个反射面之间反射的返回激光束,并且使用光电检测器来检测作为时间的函数的所述干扰的强度I. 本发明适用于测量眼内压。

    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers
    2.
    发明申请
    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers 有权
    用于评估光纤中偏振模色散的方法和装置

    公开(公告)号:US20070189656A1

    公开(公告)日:2007-08-16

    申请号:US10572203

    申请日:2004-09-14

    IPC分类号: G02B6/00

    摘要: A method of evaluating the Polarization Mode Dispersion (PMD) of an optical fiber by arranging the optical fiber at substantially zero tension on a surface, propagating prescribed evaluation optical signals along the optical fiber, measuring fiber Differential Group Delay (DGD) values in response to the evaluation optical signals, repeating at least once the acts of propagating and measuring, each time preliminarily inducing a change in a mode coupling of the fiber, and determining the fiber PMD on the basis of a calculated DGD average value. Changes in the polarization mode coupling of the fiber are induced by, moving at least a section of the fiber substantially orthogonally to the surface. An improved PMD evaluation apparatus includes a fiber arrangement surface adapted to have a fiber under test arranged thereon at substantially zero tension, and, operatively associated with the fiber arrangement surface, a fiber moving device activatable for moving the at least a section of the fiber substantially orthogonally to the fiber arrangement surface.

    摘要翻译: 一种通过将光纤布置在表面上基本为零张力的光纤来评估光纤的偏振模色散(PMD)的方法,沿着光纤传播规定的评估光信号,响应于光纤的差分组延迟(DGD)值 评估光信号,每次重复至少一次传播和测量的动作,每次预先引起光纤的模式耦合的改变,并且基于所计算的DGD平均值来确定光纤PMD。 纤维的偏振模式耦合的变化是通过将纤维的至少一部分基本上垂直于表面移动而引起的。 一种改进的PMD评估装置包括纤维布置表面,该纤维布置表面适于具有基本上零张力的被测试纤维,并且与纤维布置表面可操作地相关联;纤维移动装置,其可激活以基本上移动纤维的至少一部分 与纤维布置表面正交。

    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it
    5.
    发明授权
    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it 失效
    具有低偏振模色散的光纤及其制造方法和装置

    公开(公告)号:US07409126B2

    公开(公告)日:2008-08-05

    申请号:US10528836

    申请日:2003-09-22

    IPC分类号: G02B6/44

    摘要: An apparatus for producing a low-PMD optical fiber having a furnace for melting a lower portion of an optical preform; a traction device for pulling an optical fiber from the lower portion of an optical preform; a spinning device for imparting a substantially constant and unidirectional spin to the optical fiber as it is pulled, which causes the fiber to undergo an elastic torsion; a winding device for winding the optical fiber onto a reel; and a twisting device for imparting to the spun optical fiber a unidirectional twist in a direction opposite the elastic torsion, so as to control the residual twist in the optical fiber. A process for producing the fiber, an optical fiber and a cable are also provided.

    摘要翻译: 一种用于生产具有用于熔化光学预型件的下部的炉的低PMD光纤的设备; 用于从光学预型件的下部拉动光纤的牵引装置; 旋转装置,用于在被拉动时使光纤基本上恒定且单向旋转,这导致纤维经受弹性扭转; 用于将光纤缠绕到卷轴上的卷绕装置; 以及用于使纺丝光纤沿与弹性扭转相反的方向赋予单向捻度的扭转装置,以便控制光纤中的残余扭曲。 还提供了用于生产纤维,光纤和电缆的方法。

    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers
    7.
    发明授权
    Method and apparatus for the evaluation of polarization mode dispersion in optical fibers 有权
    用于评估光纤中偏振模色散的方法和装置

    公开(公告)号:US07768630B2

    公开(公告)日:2010-08-03

    申请号:US10572203

    申请日:2004-09-14

    IPC分类号: G01N21/00

    摘要: A method of evaluating the Polarization Mode Dispersion (PMD) of an optical fiber by arranging the optical fiber at substantially zero tension on a surface, propagating prescribed evaluation optical signals along the optical fiber, measuring fiber Differential Group Delay (DGD) values in response to the evaluation optical signals, repeating at least once the acts of propagating and measuring, each time preliminarily inducing a change in a mode coupling of the fiber, and determining the fiber PMD on the basis of a calculated DGD average value. Changes in the polarization mode coupling of the fiber are induced by, moving at least a section of the fiber substantially orthogonally to the surface. An improved PMD evaluation apparatus includes a fiber arrangement surface adapted to have a fiber under test arranged thereon at substantially zero tension, and, operatively associated with the fiber arrangement surface, a fiber moving device activatable for moving the at least a section of the fiber substantially orthogonally to the fiber arrangement surface.

    摘要翻译: 一种通过将光纤布置在表面上基本为零张力的光纤来评估光纤的偏振模色散(PMD)的方法,沿着光纤传播规定的评估光信号,响应于光纤的差分组延迟(DGD)值 评估光信号,每次重复至少一次传播和测量的动作,每次预先引起光纤的模式耦合的改变,并且基于所计算的DGD平均值来确定光纤PMD。 纤维的偏振模式耦合的变化是通过将纤维的至少一部分基本上垂直于表面移动而引起的。 一种改进的PMD评估装置包括纤维布置表面,该纤维布置表面适于具有基本上零张力的被测试纤维,并且与纤维布置表面可操作地相关联;纤维移动装置,其可激活以基本上移动纤维的至少一部分 与纤维布置表面正交。

    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it
    9.
    发明申请
    Optical fiber having a low polarization mode dispersion and process and apparatus for producing it 失效
    具有低偏振模色散的光纤及其制造方法和装置

    公开(公告)号:US20060147166A1

    公开(公告)日:2006-07-06

    申请号:US10528836

    申请日:2003-09-22

    IPC分类号: G02B6/02

    摘要: An apparatus for producing a low-PMD optical fiber having a furnace for melting a lower portion of an optical preform; a traction device for pulling an optical fiber from the lower portion of an optical preform; a spinning device for imparting a substantially constant and unidirectional spin to the optical fiber as it is pulled, which causes the fiber to undergo an elastic torsion; a winding device for winding the optical fiber onto a reel; and a twisting device for imparting to the spun optical fiber a unidirectional twist in a direction opposite the elastic torsion, so as to control the residual twist in the optical fiber. A process for producing the fiber, an optical fiber and a cable are also provided.

    摘要翻译: 一种用于生产具有用于熔化光学预型件的下部的炉的低PMD光纤的设备; 用于从光学预型件的下部拉动光纤的牵引装置; 旋转装置,用于在被拉动时使光纤基本上恒定且单向旋转,这导致纤维经受弹性扭转; 用于将光纤缠绕到卷轴上的卷绕装置; 以及用于使纺丝光纤沿与弹性扭转相反的方向施加单向捻度的扭转装置,以控制光纤中的残余扭曲。 还提供了用于生产纤维,光纤和电缆的方法。

    Cascaded raman pump for raman amplification in optical systems
    10.
    发明申请
    Cascaded raman pump for raman amplification in optical systems 审中-公开
    级联拉曼泵用于光学系统中的拉曼放大

    公开(公告)号:US20050259315A1

    公开(公告)日:2005-11-24

    申请号:US10515833

    申请日:2002-05-31

    摘要: A pumping module having a cascaded Raman laser for Raman amplified optical transmission systems. Non-linear parametric phenomena, such as Raman-assisted three-wave mixing, in Raman amplified signals from a cascaded Raman pump are strongly reduced by substantially suppressing from the output spectrum of the Raman pump the emission peaks at wavelengths shorter than that of the desired pumping wave on a specific wavelength λn, and within a given spacing from λn. The pumping non-zero dispersion fibres have zero dispersion between the wavelength range of the transmission signal and the wavelength range of the pump signal.

    摘要翻译: 具有用于拉曼放大光传输系统的级联拉曼激光器的泵浦模块。 来自级联拉曼泵的拉曼放大信号中的拉曼辅助三波混合的非线性参数现象通过从拉曼泵的输出光谱基本上抑制的波长比期望的波长短 在特定波长λN n上的泵浦波,并且在距离λN n的给定间隔内。 泵浦非零色散光纤在传输信号的波长范围和泵浦信号的波长范围之间具有零色散。