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21. 发明申请

WO2007036051A1 POLARIZATION OPTICAL TIME DOMAIN REFLECTOMETER AND METHOD OF DETERMINING PMD 审中-公开
标题翻译：偏振光学时域反射仪及其测定方法
公开(公告)号：WO2007036051A1
公开(公告)日：2007-04-05
申请号：PCT/CA2006/001610
申请日：2006-09-29
申请人： EXFO ELECTRO-OPTICAL ENGINEERING INC. , CYR, Normand , CHEN, Hongxin
发明人： CYR, Normand , CHEN, Hongxin
IPC分类号： G01M11/02 , H04B10/08
CPC分类号： G01M11/3181
摘要： In a method of measuring cumulative polarization mode dispersion (PMD) along the length of a fiber-under-test (FUT), a polarization-sensitive optical time domain reflectometer (POTDR) is used to inject into the FUT plural series of light pulses arranged in several groups. Each group comprises at least two series of light pulses having different but closely-spaced wavelengths and the same state of polarization (SOP). At least two, and preferably a large number of such groups, are injected and corresponding OTDR traces obtained for each series of light pulses by averaging the impulse-response signals of the several series of light pulses in the group. The process is repeated for a large number of groups having didfferent wavelengths and/or SOPs. The PMD then is obtained by normalizing the OTDR traces of all of the groups, then computing the difference between each normalized OTDR trace in one group and the corresponding normalized OTDR trace in another group, followed by the mean-square value of the differences. Finally, the PMD is computed as a predetermined function of the mean-square difference. The function may, for example, be a differential formula, an arcsine formula, and so on.
摘要翻译：在沿着被测光纤（FUT）的长度测量累积偏振模色散（PMD）的方法中，使用极化敏感光时域反射计（POTDR）将FUT多个系列的光脉冲在几个组。每个组包括至少两个具有不同但紧密相隔的波长和相同的偏振状态（SOP）的光脉冲序列。通过平均组中若干系列的光脉冲的脉冲响应信号，为每一系列光脉冲注入至少两个，优选大量的这样的基团和相应的OTDR迹线。对于具有正确波长和/或SOP的大量组重复该过程。然后通过归一化所有组的OTDR迹线获得PMD，然后计算一组中的每个归一化OTDR迹线与另一组中对应的归一化OTDR迹线之间的差异，随后是差的均方值。最后，将PMD计算为均方差的预定函数。该函数可以是例如微分公式，反正弦公式等。

22. 发明申请

WO2005095918A3 SIMPLE HIGH EFFICIENCY OPTICAL COHERENCE DOMAIN REFLECTOMETER DESIGN 审中-公开
标题翻译：简单的高效光学相干域反射仪设计
公开(公告)号：WO2005095918A3
公开(公告)日：2005-12-15
申请号：PCT/US2005010471
申请日：2005-03-29
申请人： ZEISS CARL MEDITEC INC , EVERETT MATTHEW J , ZHOU YAN
发明人： EVERETT MATTHEW J , ZHOU YAN
IPC分类号： A61B5/00 , G01B9/02 , G01M11/00 , G01N21/47
CPC分类号： G01M11/3181 , A61B5/0066 , A61B5/0084 , G01B9/0201 , G01B9/02044 , G01B9/02091 , G01B2290/40 , G01B2290/70 , G01N21/4795
摘要： The present invention discloses simple and yet highly efficient configurations of optical coherence domain reflectometry systems. The combined use of a polarizing beam splitter (614a) with one or two polarization manipulator(s) (634a and 646) (e.g. a Faraday rotator or a quarter wave plate) that rotate the returned light wave polarization to an orthogonal direction, enables one to achieve high optical power delivery efficiency as well as fixed or predetermined output polarization state of the interfering light waves reaching a detector (652a) or detector array, which is especially beneficial for spectral domain optical coherence tomography. In addition, the system can be made insensitive to polarization fading resulting from the birefringence change in the sample (620a) and reference (622a) arms. Dispersion matching can also be easily achieved between the sample and the reference arm for high resolution longitudinal scanning.
摘要翻译：本发明公开了光学相干畴反射系统的简单且高效的配置。将偏振分束器（614a）与一个或两个偏振操纵器（634a和646）（例如，法拉第旋转器或四分之一波片）组合使用，其将返回的光波偏振旋转到正交方向，使得能够以实现高光功率传递效率以及到达检测器（652a）或检测器阵列的干扰光波的固定或预定输出偏振状态，这对于光谱域光学相干断层扫描特别有益。此外，该系统可以对由样品（620a）和参考（622a）臂中的双折射变化导致的偏振衰减不敏感。也可以在样品和参考臂之间轻松实现色散匹配，以实现高分辨率纵向扫描。

23. 发明申请

WO01037459A1 PROCESS AND APPARATUS FOR MEASURING POLARISATION DISPERSION IN OPTICAL FIBRES 审中-公开
标题翻译：用于测量光纤中极化散射的方法和装置
公开(公告)号：WO01037459A1
公开(公告)日：2001-05-25
申请号：PCT/EP2000/011305
申请日：2000-11-15
IPC分类号： G01M11/02 , G01M11/00 , H04B10/2569 , H04B10/18 , H04B10/08
CPC分类号： H04B10/2569 , G01M11/3181
摘要： The process and apparatus to enable measurement of polarisation dispersion of a single-mode optical fibre (1) by launching measurement light at one end of the fibre (1) and analysing polarisation of the light reflected by the other end and collected at such launch end. Optical or electronic masking of light reflected by the near end of the fibre (1) is performed during launch.
摘要翻译：通过在光纤（1）的一端发射测量光并分析由另一端反射并在这种发射端收集的光的偏振，能够测量单模光纤（1）的偏振色散的方法和装置。由光纤（1）的近端反射的光的光学或电子掩蔽在发射过程中进行。

24. 发明申请

WO01020289A1 SYSTEM AND METHOD FOR MEASURING THE TRANSFER FUNCTION OF A GUIDED WAVE DEVICE 审中-公开
标题翻译：用于测量导波器件传输功能的系统和方法
公开(公告)号：WO01020289A1
公开(公告)日：2001-03-22
申请号：PCT/US2000/023588
申请日：2000-08-28
IPC分类号： G01M11/00
CPC分类号： G01M11/3172 , G01M11/3145 , G01M11/3181
摘要： Optical energy of a selected wavelength is generated at a source and directed along N reference optical paths to N detectors such that N reference signals are produced. The optical energy from the source is also directed to the N-ports of the guided wave device and then onto each of the N detectors, defining N measurement optical paths and producing N modified signals. At each of the N detectors, each of the N modified signals is combined with a corresponding one of the N reference signals. Each of the N squared measurement signals is sampled at a wave number increment delta K so that N squared sampled signals are produced from which the NxN transfer function elements are generated. Reference and measurement path length constrainsts are defined such that the N combined signals at each of the N detectors are spatially separated from one another in the time domain.
摘要翻译：所选波长的光能量在源处产生并沿着N个参考光路指向N个检测器，从而产生N个参考信号。来自源的光能还被引导到导波装置的N端口，然后到达N个检测器中的每一个，定义N个测量光路并产生N个修改的信号。在每个N个检测器中，N个修正信号中的每一个与N个参考信号中的相应一个组合。 N个平方的测量信号中的每一个以波数增量增量K被采样，从而产生N个N×N个传递函数元素的N个平方采样信号。参考和测量路径长度约束被定义为使得N个检测器中的每一个处的N个组合信号在时域中彼此空间上分离。

25. 发明申请

WO00065324A1 APPARATUS AND METHOD FOR MEASURING POLARIZATION DEPENDENT LOSS 审中-公开
标题翻译：测量极化相关损失的装置和方法
公开(公告)号：WO00065324A1
公开(公告)日：2000-11-02
申请号：PCT/US2000/009501
申请日：2000-04-07
IPC分类号： G01M11/02 , G01M11/00
CPC分类号： G01M11/3181 , G01M11/337
摘要： An apparatus for measuring polarization dependent loss is disclosed featuring several fiber optic couplers combined in tandem and oriented such that the PDL noise of the measurement system is reduced to a negligible level. By matching the PDLs of the couplers and vectorally subtracting opposite phases of polarization, the PDL of the measurement system is virtually eliminated. Thus, the PDL noise floor is lowered to near zero and the PDL of the optical device-under-test (DUT) can be accurately measured. The system is relatively inexpensive to implement and offers needed versatility because it measures the PDL of optical devices that operate in a reflection mode or in a forward transmission mode. Thus, it provides one PDL measurement solution for both types of devices.
摘要翻译：公开了一种用于测量偏振相关损耗的装置，其特征在于具有串联组合的多个光纤耦合器并定向成使得测量系统的PDL噪声降低至可忽略的水平。通过匹配耦合器的PDL和矢量减去相反的极化相位，实际上消除了测量系统的PDL。因此，PDL本底降低到接近零，并且可以精确地测量被测光学器件（DUT）的PDL。该系统实现相对便宜并且提供所需的通用性，因为它测量以反射模式或正向传输模式操作的光学装置的PDL。因此，它为两种类型的设备提供了一个PDL测量解决方案。

26. 发明申请

WO2016150927A1 MEASUREMENT SYSTEM AND METHOD TO INTERROGATE BIREFRINGENT OPTICAL SENSORS WITH A FREQUENCY SWEPT SOURCE BASED INTERROGATOR 审中-公开
标题翻译：用基于频率切换源的INTERROGATOR来测量双向光传感器的测量系统和方法
公开(公告)号：WO2016150927A1
公开(公告)日：2016-09-29
申请号：PCT/EP2016/056181
申请日：2016-03-21
申请人： FAZ TECHNOLOGY LTD.
发明人： IBRAHIM, Selwan K. , O'DOWD, John , KARABACAK, Devrez Mehmet
IPC分类号： G01D5/353
CPC分类号： G01M11/3181 , G01D5/35316 , G01D5/35387 , H01S5/06804 , H01S5/06821 , H01S5/0687
摘要： The invention provides a measurement system to interrogate at least one birefringent optical sensor and a method to interrogate birefringent optical sensors at high speed and high resolution. The system and method detects, at least, a first and a second spectral feature that are polarization dependent, wherein the detected first and second spectral features correspond to different responses of at least one birefringent optical sensor.
摘要翻译：本发明提供了一种用于询问至少一个双折射光学传感器的测量系统以及以高速和高分辨率询问双折射光学传感器的方法。该系统和方法至少检测偏振相关的第一和第二光谱特征，其中检测到的第一和第二光谱特征对应于至少一个双折射光学传感器的不同响应。

27. 发明申请

WO2014060158A1 AN OPTICAL FREQUENCY DOMAIN REFLECTOMETRY (OFDR) SYSTEM 审中-公开
标题翻译：光学频域反射测量（OFDR）系统
公开(公告)号：WO2014060158A1
公开(公告)日：2014-04-24
申请号：PCT/EP2013/069083
申请日：2013-09-16
申请人： KONINKLIJKE PHILIPS N.V.
发明人： HORIKX, Jeroen Jan Lambertus , 'T HOOFT, Gert Wim , MARELL, Milan Jan Henri
IPC分类号： H04B10/071 , G01M11/00
CPC分类号： H04B10/071 , G01M11/3172 , G01M11/3181 , H04B10/25
摘要： There is presented an optical frequency domain reflectometry (OFDR) system (100) comprising a first coupling point (15) arranged for splitting radiation into two parts, so that radiation may be emitted into a reference path (16) and a measurement path (17). The system further comprises an optical detection unit (30) capable of obtaining a signal from the combined optical radiation from the reference path and the measurement path via a second coupling point (25). The measurement path (17) comprises a polarization dependent optical path length shifter (PDOPS, PDFS, 10), which may create a first polarization (PI) and a second polarization (P2) for the radiation in the measurement path, where the optical path length is different for the first and second polarizations in the measurement path. This may be advantageous for obtaining an improved optical frequency domain reflectometry (OFDR) system where e.g. the two measurements for input polarizations may be performed in the same scan of a radiation source.
摘要翻译：提出了一种光频域反射测量（OFDR）系统（100），其包括被布置成将辐射分成两部分的第一耦合点（15），使得辐射可以被发射到参考路径（16）和测量路径（17 ）。该系统还包括能够通过第二耦合点（25）获得来自参考路径和测量路径的组合光辐射的信号的光学检测单元（30）。测量路径（17）包括偏振相关光路长度移位器（PDOPS，PDFS，10），其可以为测量路径中的辐射产生第一偏振（PI）和第二偏振（P2），其中光路长度对于测量路径中的第一和第二极化是不同的。这可能有利于获得改进的光频域反射计（OFDR）系统，其中例如。用于输入偏振的两个测量可以在辐射源的相同扫描中执行。

28. 发明申请

WO2013023425A1 偏振敏感的分布式光频域反射扰动传感装置和解调方法审中-公开
公开(公告)号：WO2013023425A1
公开(公告)日：2013-02-21
申请号：PCT/CN2011/084101
申请日：2011-12-16
申请人：天津大学 , 刘铁根 , 刘琨 , 丁振扬 , 江俊峰 , 李定杰
发明人：刘铁根 , 刘琨 , 丁振扬 , 江俊峰 , 李定杰
IPC分类号： G01D5/353 , G01H9/00
CPC分类号： G01M11/3172 , G01D5/35325 , G01D5/35329 , G01D5/35354 , G01H9/004 , G01M11/3181
摘要：一种偏振敏感的分布式光频域反射扰动传感装置，采用光频域反射技术和偏振控制及提取技术，包括超窄线宽可调谐激光器模块、偏振产生和偏振分集探测模块、光频和相位监控模块、高速光开关模块，组成大规模长距离光传感网络。还提供了一种偏振敏感的分布式光频域反射扰动解调方法，采用光频非线性及光源相位噪声的抑制和补偿、超分辨分析方法、先进去噪方法以及基于光纤分布式波片模型的琼斯和穆勒矩阵的偏振解算方法实现传感光缆中偏振信息提取。

29. 发明申请

WO2007134453A3 METHOD FOR MONITORING AND MEASURING OPTICAL PROPERTIES OF DEVICE IN POLARIZATION MAINTAINING FIBERS BY USING REFERENCE FIBER BRAGG GRATING AND FIBER COMPONENTS MANUFACTURED THEREBY 审中-公开
标题翻译：通过使用参考光纤布拉格光栅和光纤部件来监测和测量极化维护纤维中器件的光学性质的方法
公开(公告)号：WO2007134453A3
公开(公告)日：2008-01-10
申请号：PCT/CA2007000904
申请日：2007-05-23
申请人： ITF LAB INC , ZHOU CHANGZUN , ZHAO YUNFEI
发明人： ZHOU CHANGZUN , ZHAO YUNFEI
IPC分类号： G01J4/00 , C03B37/075 , G01M11/02 , G02B6/024
CPC分类号： G02B6/02109 , G01D5/35303 , G01M11/3181
摘要： This invention provides a method for measuring and monitoring the state of polarization (SOP) of a polarization maintaining (PM) fiber and the like using a narrowband fiber Bragg grating (FBG) written on the same. The PM fiber therefore comprises a first narrowband reference FBG which is used as a reference to measure and monitor the SOP of the PM fiber. Due to the birefringence properties of the PM fiber, the reference FBG will generally reflect two narrowband spectra, each having a central wavelength; one in the slow axis and one in the fast axis. By measuring the intensity of the reflected spectra in each axis and by tuning the fiber with a polarization controller, it is possible to adjust the fiber to a predetermined SOP. After having adjusted the PM fiber to a predetermined SOP, it is possible to accurately measure the optical properties of a second grating, or of another optical device, according to the predetermined SOP. The method of the present invention can also be advantageously used for accurate measurement of reflectivity.
摘要翻译：本发明提供了一种使用写在其上的窄带光纤布拉格光栅（FBG）来测量和监测偏振维持（PM）光纤等的偏振状态（SOP）的方法。 PM纤维因此包括第一窄带参考FBG，其用作测量和监测PM光纤的SOP的参考。由于PM光纤的双折射性质，参考光栅将通常反射两个窄带光谱，每个具有中心波长; 一个在慢轴上，一个在快轴上。通过测量每个轴上反射光谱的强度并通过用偏振控制器调谐光纤，可以将光纤调节到预定的SOP。在将PM光纤调节到预定的SOP之后，可以根据预定的SOP精确地测量第二光栅或另一光学装置的光学特性。本发明的方法还可以有利地用于精确测量反射率。

30. 发明申请

WO2007027408A1 METHOD OF EVALUATING FIBER PMD USING POTDR TRACE 审中-公开
标题翻译：使用POTDR TRACE评估光纤PMD的方法
公开(公告)号：WO2007027408A1
公开(公告)日：2007-03-08
申请号：PCT/US2006/031438
申请日：2006-08-14
申请人： CORNING INCORPORATED , CHEN, Xin , HERON, Nicol A
发明人： CHEN, Xin , HERON, Nicol A
IPC分类号： G01M11/02 , G01J4/00
CPC分类号： G01M11/3181
摘要： A method for screening fiber polarization mode dispersion using a polarization optical time domain reflectometer is disclosed. A pulse radiation is emitted into an end of the fiber under test, and the backscattered radiation is measured by the POTDR and used to obtain an OTDR trace. A pulse radiation is emitted into an opposite end of the fiber under test, and the backscattered radiation is measured by the POTDR and used to obtain another OTDR trace. Either one or both traces are analyzed to compare the variation of intensity of signals along the length of the fiber, the variation in signals relating to the PMD along the length of the fiber.
摘要翻译：公开了一种使用偏振光时域反射计屏蔽光纤偏振模色散的方法。脉冲辐射被发射到被测光纤的一端，并且后向散射辐射由POTDR测量并用于获得OTDR迹线。脉冲辐射被发射到待测光纤的相对端，反向散射辐射由POTDR测量并用于获得另一个OTDR迹线。分析一个或两个迹线以比较沿着光纤长度的信号强度的变化，沿着光纤的长度与PMD相关的信号的变化。

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