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1. 发明授权

US10727940B2 Noise-free measurement of the spectral shape of a modulated signal using spectral correlation 有权
公开(公告)号：US10727940B2
公开(公告)日：2020-07-28
申请号：US16445992
申请日：2019-06-19
申请人： EXFO Inc.
发明人： Normand Cyr , Gang He , Bernard Ruchet
IPC分类号： H04B10/00 , H04B10/079
摘要： Method and systems for characterizing an optical signal propagating along a communication link are disclosed. The signal includes a data-carrying signal contribution, modulated at a symbol frequency, and a noise contribution. The method includes measuring an optical power spectrum of the signal, which includes a data-carrying signal spectrum component and a noise spectrum component. The method also includes determining a measured spectral correlation function within pairs of spectral components of the signal as a function of center frequency of the pairs, the spectral components in each pair being spectrally separated from each other by the symbol frequency. The method further includes obtaining a solution for the data-carrying signal spectrum component based on the measured optical power spectrum, such that a calculated spectral correlation function based on the solution matches the measured spectral correlation function. In some embodiments, the spectral correlation function is measured as a low-frequency beatnote amplitude function.

2. 发明申请

US20140327735A1 PORTABLE DIGITAL HOLOGRAPHIC PROBE FOR THE INSPECTION OF OPTICAL FIBER CONNECTORS, AND INSPECTION SYSTEM AND METHOD FOR THE SAME 有权
标题翻译：用于检查光纤连接器的便携式数字全息检测器及其检测系统及方法
公开(公告)号：US20140327735A1
公开(公告)日：2014-11-06
申请号：US14368625
申请日：2012-12-21
申请人： EXFO INC.
发明人： Bernard Ruchet , Normand Cyr
IPC分类号： G03H1/08
CPC分类号： G03H1/0866 , G01B9/021 , G01M11/088 , G01N21/94 , G01N2201/0627 , G02B6/385 , G02B21/0016
摘要： A portable inspection probe for the inspection of a recessed mating surface of an optical fiber connector is provided. In one variant, the portable inspection probe includes a digital holographic detection module operable to digitally record a hologram of the recessed mating surface, and a rigid probe tip configured to be optically coupled to the digital holographic detection module and shaped to provide optical access to the recessed mating surface. In another variant, the portable inspection probe is to be used with a rigid probe tip connectable thereto, and the digital holographic detection module includes a probing optical assembly not traversed by a reference beam and configured to direct an object beam onto the recessed mating surface and to collect the object beam upon reflection thereof by the recessed mating surface. An inspection system and an inspection method are also provided.
摘要翻译：提供了用于检查光纤连接器的凹入配合表面的便携式检查探针。在一个变型中，便携式检查探针包括数字全息检测模块，可操作以数字地记录凹入的配合表面的全息图;以及刚性探针末端，被配置为光学耦合到数字全息检测模块，并成形为提供对嵌合配合面。在另一个变型中，便携式检查探针将与可连接到其上的刚性探针末端一起使用，并且数字全息检测模块包括探测光学组件，其不被参考光束穿过并被配置为将物体光束引导到凹入的配合表面上，以通过凹入的配合表面反射来收集物体光束。还提供了检查系统和检查方法。

3. 发明授权

US09829429B2 Determining a polarization-related characteristic of an optical link 有权
公开(公告)号：US09829429B2
公开(公告)日：2017-11-28
申请号：US13767851
申请日：2013-02-14
申请人： EXFO Inc.
发明人： Normand Cyr , Hongxin Chen , Gregory Walter Schinn
IPC分类号： G01N21/21 , G01M11/00 , G06F17/18
CPC分类号： G01N21/21 , G01M11/3163 , G01M11/3181 , G01M11/335 , G01M11/336 , G06F17/18
摘要： A polarization-related characteristic of an optical path is determined from a predetermined function of the mean-square of a plurality of differences between polarization-analyzed optical power parameters corresponding to pairs of wavelengths mutually spaced about a midpoint wavelength by a small optical frequency difference. At least some of the said differences correspond to wavelength pairs measured under conditions where at least one of midpoint wavelength, input state of polarization (I-SOP) or analyzed state of polarization (A-SOP) of a pair is different.

4. 发明授权

US09654213B2 Method and apparatus for testing transmission lines normally propagating optical signals 有权
公开(公告)号：US09654213B2
公开(公告)日：2017-05-16
申请号：US15069365
申请日：2016-03-14
申请人： EXFO Inc.
发明人： Bernard Ruchet , Normand Cyr
IPC分类号： H04J14/00 , H04B10/079 , H04B3/46 , H04Q11/00
CPC分类号： H04B10/07955 , H04B3/46 , H04B10/079 , H04B10/0793 , H04B10/0795 , H04B10/07953 , H04Q11/0067 , H04Q2011/0083
摘要： A portable apparatus for measuring optical powers of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the optical powers of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.

5. 发明申请

US20140363157A1 METHOD AND APPARATUS FOR TESTING TRANSMISSION LINES NORMALLY PROPAGATING OPTICAL SIGNALS 有权
标题翻译：用于测试传输线正常传播光信号的方法和装置
公开(公告)号：US20140363157A1
公开(公告)日：2014-12-11
申请号：US14468890
申请日：2014-08-26
申请人： EXFO Inc.
发明人： Bernard Ruchet , Normand Cyr
IPC分类号： H04B10/079 , H04Q11/00 , H04B3/46
CPC分类号： H04B10/07955 , H04B3/46 , H04B10/079 , H04B10/0793 , H04B10/0795 , H04B10/07953 , H04Q11/0067 , H04Q2011/0083
摘要： A portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the parameters of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.
摘要翻译：一种用于测量在两个元件之间的光传输路径中以相反方向同时传播的光信号的参数的便携式设备，所述元件中的至少一个仅在其继续接收第二光信号时才发送第一光信号（S1）（S2）包括用于将设备串联连接到光传输路径中的第一和第二连接器装置，以及连接在第一和第二连接器装置之间的传播和测量装置，用于至少传播第二光信号（S2），并且测量同时传播的光信号（S1，S2）的参数。测量结果可以由合适的显示单元显示。当一个元件以两个不同的波长发射信号时，该装置可以根据波长分离对应的光信号部分的部分并分别处理它们。

6. 发明申请

US20160197674A1 METHOD AND APPARATUS FOR TESTING TRANSMISSION LINES NORMALLY PROPAGATING OPTICAL SIGNALS 有权
标题翻译：用于测试传输线正常传播光信号的方法和装置
公开(公告)号：US20160197674A1
公开(公告)日：2016-07-07
申请号：US15069365
申请日：2016-03-14
申请人： EXFO Inc.
发明人： Bernard Ruchet , Normand Cyr
IPC分类号： H04B10/079
CPC分类号： H04B10/07955 , H04B3/46 , H04B10/079 , H04B10/0793 , H04B10/0795 , H04B10/07953 , H04Q11/0067 , H04Q2011/0083
摘要： A portable apparatus for measuring optical powers of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the optical powers of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.
摘要翻译：一种用于测量在两个元件之间的光传输路径中以相反方向同时传播的光信号的光功率的便携式设备，所述元件中的至少一个仅在其继续接收第二光信号来自所述元件中的另一个的信号（S2）包括用于将设备串联连接到光传输路径中的第一和第二连接器装置，以及连接在第一和第二连接器装置之间的传播和测量装置，用于至少传播第二光学信号（S2），并且测量同时传播的光信号（S1，S2）的光功率。测量结果可以由合适的显示单元显示。当一个元件以两个不同的波长发射信号时，该装置可以根据波长分离对应的光信号部分的部分并分别处理它们。

7. 发明申请

US20160161397A9 DETERMINING A POLARIZATION-RELATED CHARACTERISTIC OF AN OPTICAL LINK 有权
标题翻译：确定光学链路的极化相关特性
公开(公告)号：US20160161397A9
公开(公告)日：2016-06-09
申请号：US13767851
申请日：2013-02-14
申请人： EXFO Inc.
发明人： Normand Cyr , Hongxin Chen , Gregory Walter Schinn
IPC分类号： G01N21/21 , G06F17/18
CPC分类号： G01N21/21 , G01M11/3163 , G01M11/3181 , G01M11/335 , G01M11/336 , G06F17/18
摘要： A polarization-related characteristic of an optical path is determined from a predetermined function of the mean-square of a plurality of differences between polarization-analyzed optical power parameters corresponding to pairs of wavelengths mutually spaced about a midpoint wavelength by a small optical frequency difference. At least some of the said differences correspond to wavelength pairs measured under conditions where at least one of midpoint wavelength, input state of polarization (I-SOP) or analyzed state of polarization (A-SOP) of a pair is different.
摘要翻译：光路的极化相关特性是根据对应于中点波长相互间隔的一对波长的偏振分析光功率参数之间的多个差的平均值的预定函数由小的光频差确定的。所述差异中的至少一些对应于在一对中点波长，输入偏振态（I-SOP）或分析的偏振状态（A-SOP）中的至少一个不同的条件下测量的波长对。

8. 发明授权

US09287974B2 Method and apparatus for testing transmission lines normally propagating optical signals 有权
标题翻译：测试传输线正常传播光信号的方法和装置
公开(公告)号：US09287974B2
公开(公告)日：2016-03-15
申请号：US14468890
申请日：2014-08-26
申请人： EXFO Inc.
发明人： Bernard Ruchet , Normand Cyr
IPC分类号： H04B10/08 , H04B10/079 , H04B3/46 , H04Q11/00
CPC分类号： H04B10/07955 , H04B3/46 , H04B10/079 , H04B10/0793 , H04B10/0795 , H04B10/07953 , H04Q11/0067 , H04Q2011/0083
摘要： A portable apparatus for measuring parameters of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the parameters of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately.
摘要翻译：一种用于测量在两个元件之间的光传输路径中以相反方向同时传播的光信号的参数的便携式设备，所述元件中的至少一个仅在其继续接收第二光信号时才发送第一光信号（S1）（S2）包括用于将设备串联连接到光传输路径中的第一和第二连接器装置，以及连接在第一和第二连接器装置之间的传播和测量装置，用于至少传播第二光信号（S2），并且测量同时传播的光信号（S1，S2）的参数。测量结果可以由合适的显示单元显示。当一个元件以两个不同的波长发射信号时，该装置可以根据波长分离对应的光信号部分的部分并分别处理它们。

9. 发明授权

US09733616B2 Portable digital holographic probe for the inspection of optical fiber connectors, and inspection system and method for the same 有权
公开(公告)号：US09733616B2
公开(公告)日：2017-08-15
申请号：US14368625
申请日：2012-12-21
申请人： EXFO INC.
发明人： Bernard Ruchet , Normand Cyr
IPC分类号： G01B9/021 , G03H1/08 , G02B6/38 , G02B21/00 , G01N21/94 , G01M11/08
CPC分类号： G03H1/0866 , G01B9/021 , G01M11/088 , G01N21/94 , G01N2201/0627 , G02B6/385 , G02B21/0016
摘要： A portable inspection probe for the inspection of a recessed mating surface of an optical fiber connector is provided. In one variant, the portable inspection probe includes a digital holographic detection module operable to digitally record a hologram of the recessed mating surface, and a rigid probe tip configured to be optically coupled to the digital holographic detection module and shaped to provide optical access to the recessed mating surface. In another variant, the portable inspection probe is to be used with a rigid probe tip connectable thereto, and the digital holographic detection module includes a probing optical assembly not traversed by a reference beam and configured to direct an object beam onto the recessed mating surface and to collect the object beam upon reflection thereof by the recessed mating surface. An inspection system and an inspection method are also provided.

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