公开(公告)号：US06816536B2

公开(公告)日：2004-11-09

申请号：US10006997

申请日：2001-11-30

申请人： Karin Julliard ,  Steve Utter ,  Alan B. Petersen

发明人： Karin Julliard ,  Steve Utter ,  Alan B. Petersen

IPC分类号： H01S300

CPC分类号： G02B27/0006 ,  B65D81/266 ,  B65D85/38 ,  H01S3/025 ,  H01S3/027

摘要： A method and apparatus are provided for in situ protection of sensitive optical materials from alternation or damage due to exposure to trace atmospheric components, during shipping, storage or operation. The sensitive optical material is disposed within an enclosure adaptable to be substantially sealed against the external atmosphere. A container, enclosing a sink material absorbing trace atmospheric components, is coupled to the enclosure by a gas permeable surface, which allows fast diffusion of the trace atmospheric component inside the enclosure to the sink material.

公开(公告)号：US5913234A

公开(公告)日：1999-06-15

申请号：US954466

申请日：1997-10-20

申请人： Karin Julliard ,  Nicolas Gisin ,  Jean-Paul Pellaux

发明人： Karin Julliard ,  Nicolas Gisin ,  Jean-Paul Pellaux

IPC分类号： G01N29/00 ,  G01N21/00 ,  G01N21/17

CPC分类号： G01N21/1702

摘要： A method and apparatus for determining the concentration of a substance of interest by gas-coupled photoacoustic spectroscopy (GC-PAS) with an essentially monochromatic beam of radiation in an optical portion of the electromagnetic spectrum; the radiation is selected so as to be absorbed by the substance of interest and the beam is modulated at a sonic frequency which is sufficiently high for generating a primary signal that depends upon the absorption coefficient of the substance of interest as well as upon parameters of operating the method; in order to compensate for these operating parameters, the beam is additionally modulated at a sonic frequency which is sufficiently low for generating a secondary signal which does not depend upon the absorption coefficient of the substance of interest, but, depends only upon parameters of operating the method; a ratio of the first and the second signal is obtained to generate a compensated signal for determining the concentration of the substance of interest.

摘要翻译： 一种通过气相偶联光声光谱法（GC-PAS）在电磁光谱的光学部分中具有基本单色的辐射束来确定感兴趣物质的浓度的方法和装置; 选择辐射以被感兴趣的物质吸收，并且以足够高的声频调制光束，以产生取决于感兴趣物质的吸收系数的主要信号以及操作参数 方法; 为了补偿这些操作参数，波束被附加地调制在足够低的声频，以产生不依赖于感兴趣物质的吸收系数的次级信号，但是仅取决于操作的参数 方法; 获得第一和第二信号的比率以产生用于确定感兴趣物质的浓度的补偿信号。

公开(公告)号：US5852496A

公开(公告)日：1998-12-22

申请号：US812061

申请日：1997-02-14

申请人： Nicolas Gisin ,  Karin Julliard

发明人： Nicolas Gisin ,  Karin Julliard

IPC分类号： G01M11/00 ,  G01B9/02

CPC分类号： G01M11/332 ,  G01M11/331 ,  G01M11/335 ,  G01M11/336

摘要： The present invention concerns a method and a device for measuring polarization dispersion of an optical fiber which is particularly useful in telecommunications, and which has a finer resolution of this measurement in comparison to methods and devices known in the art. The device consists of an interferometer (51), a low coherent light source (16), a detector (25) for generating an interferogram, and a module (52) connected in series with the optical fiber to be measured (20), this module comprising a high dispersion birefringent fiber (53) of stable, known polarization, two pairs of fiber bundles (55, 56) for adjusting the polarization controller (54) and for aligning the principal polarization modes of the optical fiber to be measured and the birefringent fiber, and an electronic processor (21) for measuring the separation of the lateral peaks on the interferogram resulting as a function of predetermined adjustments to the polarization controller. The polarization dispersion of the fiber to be measured is deduced by measuring the different separation values.

摘要翻译： 本发明涉及一种用于测量在电信中特别有用的光纤的偏振色散的方法和装置，与现有技术中已知的方法和装置相比，该测量具有更精细的分辨率。 该装置由干涉仪（51），低相干光源（16），用于产生干涉图的检测器（25）和与被测量光纤（20）串联连接的模块（52）组成。 模块包括具有稳定的已知偏振的高色散双折射光纤（53），用于调节偏振控制器（54）和用于对准待测量的光纤的主要偏振模式的两对光纤束（55,56）和 双折射光纤和用于测量作为对偏振控制器的预定调整的函数的干涉图上的横向峰值的分离的电子处理器（21）。 通过测量不同的分离值，推导待测纤维的偏振色散。