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1. 发明授权

US5825479A Apparatus for detecting fibers with different dispersion characteristics and method 失效
标题翻译：用于检测具有不同色散特性和方法的纤维的装置
公开(公告)号：US5825479A
公开(公告)日：1998-10-20
申请号：US876505
申请日：1997-06-16
申请人： Leo J. Thompson , Emmanuel Anemogiannis
发明人： Leo J. Thompson , Emmanuel Anemogiannis
IPC分类号： G01N21/41 , G01N21/84
CPC分类号： G01N21/412
摘要： A method and apparatus for distinguishing between fiber types having different dispersion characteristics and arbitrary lengths is disclosed. An optical pulse having a predetermined wavelength and predetermined time width is propagated through the fiber and then detected. The optical pulse after being fed through the fiber is measured at different wavelengths along with the length of the fiber. If the measured pulse is within a predetermined amount at the determined length, then fiber under test corresponds to a type having a first dispersion characteristic. If it is determined that the measured pulse is within a second amount, then the fiber under test corresponds to a type having a second dispersion characteristic. Alternately one or more optical pulses of arbitrary width each having different wavelengths after being propagated through the fiber under test is fed through a plurality of filters and detected. The wavelength of the pulse of the smallest time duration is detected and a corresponding dispersion characteristic is then indicated.
摘要翻译：公开了一种用于区分具有不同色散特性和任意长度的光纤类型的方法和装置。具有预定波长和预定时间宽度的光脉冲通过光纤传播，然后被检测。在纤维馈送之后的光脉冲与光纤的长度一起被测量在不同的波长处。如果所测量的脉冲在所确定的长度上在预定量内，则被测光纤对应于具有第一色散特性的类型。如果确定测量的脉冲在第二量内，则被测光纤对应于具有第二色散特性的类型。或者，在通过被测光纤传播之后，每个具有不同波长的任意宽度的一个或多个光脉冲被馈送通过多个滤光器并被检测。检测最小持续时间的脉冲的波长，然后指示相应的色散特性。

2. 发明授权

US5965876A Apparatus and method for detecting optical fiber fault location 失效
标题翻译：光纤故障定位检测装置及方法
公开(公告)号：US5965876A
公开(公告)日：1999-10-12
申请号：US915491
申请日：1997-08-20
申请人： Emmanuel Anemogiannis , Leo J. Thompson
发明人： Emmanuel Anemogiannis , Leo J. Thompson
IPC分类号： G01M11/00 , G01N21/00
CPC分类号： G01M11/3145
摘要： A method and apparatus for detecting a fault, such as a break or crack in a fiber optic cable. A test device transmits into a first end of fiber bundle under test a first pulse of optical energy. The time duration and/or intensity of the pulse propagating through the fiber after being reflected back through the fiber are determined and stored in memory. At a later point in time this step is repeated with a second pulse. If the propagation time and/or intensity of the second pulse varies by greater than a predetermined amount from that of the first pulse an alarm condition is indicated. From the propagation time of the second pulse a length is calculated and provided to the user. This length corresponds to the location of the fault.
摘要翻译：一种用于检测光缆中的断裂或裂纹的故障的方法和装置。测试装置在被测光纤束的第一端传输光能的第一脉冲。在通过光纤被反射回来之后传播通过光纤的脉冲的持续时间和/或强度被确定并存储在存储器中。在稍后的时间点，该步骤用第二脉冲重复。如果第二脉冲的传播时间和/或强度与第一脉冲的传播时间和/或强度相比变大预定量，则指示报警条件。从第二脉冲的传播时间，计算长度并提供给用户。该长度对应于故障的位置。

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