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1. 发明专利

JP2013007695A Method and device for measuring optical frequency domain reaction 有权
标题翻译：用于测量光频域反应的方法和装置
公开(公告)号：JP2013007695A
公开(公告)日：2013-01-10
申请号：JP2011141543
申请日：2011-06-27
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , Univ Of Tokyo , 国立大学法人東京大学
发明人： KOSHIKIYA YUSUKE , ITO FUMIHIKO , FAN SHINYUU , HE ZU YUAN , HOTATE KAZUO , KAZAMA TAKUSHI
IPC分类号： G01M11/00 , G01M11/02
摘要： PROBLEM TO BE SOLVED: To obtain a fading noise reduction effect by an optical comb at low cost.SOLUTION: Optical combs to be generated by a light source 11 and an optical comb generation part 12 are made incident on an external modulator 13, frequency sweep is performed to modulation sidebands of respective bright line spectra linearly to time, output light to which the frequency sweep is performed is branched into two by a first optical directional coupler 14, one is made incident on a reference optical path as reference light 17, and the other is made incident on an object 15 to be measured as signal light 16. Reflectance and loss at respective points in the object 15 to be measured are measured by taking out the signal light 16 reflected or back-scattered at the respective points in the object 15 to be measured, coupling the signal light 16 with the reference light 17 by a second optical directional coupler 18 to generate an interference beat signal, receiving the interference beat signal by a receiver 19, and analyzing the received interference beat signal by a frequency analyzer 20. Here, measurement for a plurality of times is performed by varying delay time difference to be given between the reference light 17 and the signal light 16, and addition average to the reflectance and the loss is performed to reduce fading noise.
摘要翻译：要解决的问题：以低成本获得光梳的衰落降噪效果。解决方案：由光源11和光梳发生部分12产生的光梳被入射到外部调制器13上，进行频率扫描以对时间线性地调制各个亮线谱的边带，将光输出到进行频率扫描的第一光学定向耦合器14分支为两个，一个入射到参考光路上作为参考光17，另一个被入射到待测量的物体15上作为信号光16。通过取出待测物体15的各点反射或反向散射的信号光16，将信号光16与参考光17耦合，将信号光16与参考光17耦合，测量待测物体15中的各点的反射率和损耗第二光学定向耦合器18，用于产生干扰拍频信号，由接收机19接收干扰拍频信号，并以频率分析接收的干扰拍频信号这里，通过改变在参考光17和信号光16之间给出的延迟时间差来执行多次的测量，并且执行与反射率的相加平均和损耗以减少衰落噪声。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2014020878A Characteristic analysis device and method for optical branch line 有权
标题翻译：光分路线特征分析装置及方法
公开(公告)号：JP2014020878A
公开(公告)日：2014-02-03
申请号：JP2012158797
申请日：2012-07-17
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , Univ Of Tokyo , 国立大学法人東京大学
发明人： TAKAHASHI HIROSHI , ITO FUMIHIKO , KOSHIKIYA YUSUKE , FAN SHINYUU , HE ZU YUAN , HOTATE KAZUO
IPC分类号： G01M11/00
摘要： PROBLEM TO BE SOLVED: To individually measure the optical line loss characteristics of an existing out-of-station facility.SOLUTION: With respect to a fiber to be inspected in which light reflection filters are arranged at branch lower optical fibers branched by an optical splitter, two types of test rays of light having different wavelength are generated for analyzing the characteristics of each of the branch lower optical fibers from a branch point to the light reflection filters, and the respective test rays of light are encoded and multiplexed, and the multiplexed test rays of light are made incident to the fiber to be inspected, and probe rays of light returned from the branch lower optical fibers are extracted, and the probe rays of light having the wavelength of one type of test rays of light are extracted from the probe rays of light, and the probe rays of light are converted into currents, and converted into a digital signal, and the branch lower optical fiber corresponding to the digital signal is specified, and a Brillouin gain is analyzed from the specified digital signal, and measurement is repeatedly performed by changing the code, and the Brillouin gain characteristic distribution of each of the lower branch filters is acquired from the repeated measurement result.
摘要翻译：要解决的问题：单独测量现有车站外设备的光线路损耗特性。解决方案：对于被光分路器分支的分支下光纤配置光反射滤波器的被检测光纤产生具有不同波长的两种类型的具有不同波长的测试光线，用于分析从分支点到光反射滤光器的每个分支下部光纤的特性，并且各个测试光线被编码和多路复用将测试光线入射到要检查的光纤，并且从分支下部光纤返回的探测光线被提取，并且从其中提取具有一种类型的测试光线的波长的探测光线探测光线和探测光线被转换为电流，并转换为数字信号，并且分支下部光纤对应于指定数字信号，并从指定的数字信号中分析布里渊增益，并通过改变码重复进行测量，并从重复的测量结果中获取每个下分支滤波器的布里渊增益特性分布。

3. 发明专利

JP2012154790A Optical frequency domain reflectometry and optical frequency domain reflectometer 有权
标题翻译：光学频域反射光学和光学频域反射仪
公开(公告)号：JP2012154790A
公开(公告)日：2012-08-16
申请号：JP2011014148
申请日：2011-01-26
申请人： Nippon Telegr & Teleph Corp , Univ Of Tokyo , 国立大学法人東京大学 , 日本電信電話株式会社
发明人： KOSHIKIYA YUSUKE , ITO FUMIHIKO , FAN SHINYUU , HE ZU YUAN , HOTATE KAZUO
IPC分类号： G01M11/00
摘要： PROBLEM TO BE SOLVED: To compensate for a shift of reflecting point due to chromatic dispersion when using broadband test light, and execute measurement satisfying both of low fading noise and high resolution properties.SOLUTION: An optical frequency domain reflectometer compensates for a positional shift of reflecting point (reflection waveform expansion after arithmetic mean) due to CD and reduces a fading noise while maintaining a resolution, even when executing measurement with different wavelengths for applying the FSAV, by using a measuring interferometer to execute C-OFDR measurement to a measured object 14 and also using a reference interferometer, which comprises a delay fiber 21 having a CD coefficient equal to that of the measured object 14, to execute resampling of a measurement signal.
摘要翻译：要解决的问题：为了补偿当使用宽带测试光时由于色散引起的反射点的偏移，并且执行满足低衰落噪声和高分辨率性质的测量。解决方案：即使在执行FSAV的不同波长的测量时，光频域反射计补偿由于CD引起的反射点（算术平均值之后的反射波形扩展）的位置偏移并降低衰落噪声，同时保持分辨率通过使用测量干涉仪对测量对象14执行C-OFDR测量，并且还使用参考干涉仪，其包括具有与测量对象14的CD系数相等的CD系数的延迟光纤21，以执行测量信号的重采样。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2013007571A Laser beam coherence function measuring method and measuring apparatus 有权
标题翻译：激光束相干函数测量方法和测量装置
公开(公告)号：JP2013007571A
公开(公告)日：2013-01-10
申请号：JP2011138394
申请日：2011-06-22
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： INOUE MASAAKI , KOSHIKIYA YUSUKE , FAN SHINYUU , ITO FUMIHIKO
IPC分类号： G01J9/00
摘要： PROBLEM TO BE SOLVED: To more accurately measure a coherence time of a laser beam.SOLUTION: A laser beam which is frequency-swept to be linear is split into two systems. One split beam is made incident to an optical fiber 5 by an optical circulator 4, a Rayleigh scattered beam generated and reflected in the optical fiber 5 is captured, that Rayleigh scattered beam and the other split beam are multiplexed (3-2), a photocurrent is detected from multiplexed light by a photodetector 6, Fourier transformation is performed on a current value of the detected photocurrent, and its power spectrum is analyzed (7-11). The analysis is performed continuously twice, so that an auto-correlation function of the power spectrum is determined as a function of delay τ, and the auto-correlation function is divided by an ensemble-averaged value of each power spectrum. By utilizing the fact that a value obtained by subtracting 1 from the ensemble-average of the value is proportional to the fourth power of an absolute value of a coherence function γ(τ) of delay τ, the absolute value of the coherence function γ(τ) is determined.
摘要翻译：要解决的问题：为了更精确地测量激光束的相干时间。频率扫描为线性的激光束分为两个系统。通过光环行器4将一束分光束入射到光纤5，捕获在光纤5中产生和反射的瑞利散射光束，该瑞利散射光束和另一个分束光束被多路复用（3-2），一通过光电检测器6从多路复用光检测光电流，对检测到的光电流的电流值进行傅里叶变换，并分析其功率谱（7-11）。分析连续进行两次，使得功率谱的自相关函数被确定为延迟τ的函数，并且将自相关函数除以每个功率谱的整体平均值。通过利用从该值的整体平均值减去1而获得的值与延迟τ的相干函数γ（τ）的绝对值的第四功率成比例的事实，相干函数γ（ τ）。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2012112657A Laser beam measuring method and measurement device thereof 有权
标题翻译：激光束测量方法及其测量装置
公开(公告)号：JP2012112657A
公开(公告)日：2012-06-14
申请号：JP2010259156
申请日：2010-11-19
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： INOUE MASAAKI , ITO FUMIHIKO , KOSHIKIYA YUSUKE , FAN SHINYUU
IPC分类号： G01J11/00
摘要： PROBLEM TO BE SOLVED: To accurately measure a coherence time of laser beam having a narrow spectral line width (long coherence time).SOLUTION: When a coherence function γ(τ) of the laser beam to be measured, which is the function of a delay time τ, is measured, an optical frequency of the laser beam (11) to be measured is linearly swept (12), the swept laser beam is branched (131), one side of the branched laser beam is incident to a fiber optic (15) by a circulator (14) to generate a Rayleigh scattered light, the Rayleigh scattered light generated in the fiber optic (15) and branched laser beam of another side are combined (132), the combined beams are received to detect a light current (16), the detected light current is digitized and subjected to Fourier transformation (17, 18), a standard deviation of an amplitude on the delay 0 and a standard deviation of an amplitude on delay τ are calculated, and an absolute value of the coherence function on the delay τ is obtained by a ratio of both deviations (19).
摘要翻译：要解决的问题：准确测量具有窄谱线宽度（长相干时间）的激光束的相干时间。解决方案：测量作为延迟时间τ的函数的被测量激光束的相干函数γ（τ）时，被测量的激光束（11）的光频率被线性扫描（12）中，扫掠的激光束被分支（131），分支激光束的一侧通过循环器（14）入射到光纤（15），以产生瑞利散射光，其中产生的瑞利散射光光纤（15）和另一侧的分支激光束被组合（132），组合的光束被接收以检测光电流（16），检测到的光电流被数字化并进行傅立叶变换（17,18），计算延迟0上的幅度的标准偏差和延迟τ上的振幅的标准偏差，并且通过两个偏差的比（19）获得延迟τ上的相干函数的绝对值。版权所有（C）2012，JPO＆INPIT

6. 发明专利

JP2012117886A Method and apparatus for optical frequency domain reflectometry 审中-公开
标题翻译：用于光频域反射测量的方法和装置
公开(公告)号：JP2012117886A
公开(公告)日：2012-06-21
申请号：JP2010266766
申请日：2010-11-30
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： FAN SHINYUU , ITO FUMIHIKO , KOSHIKIYA YUSUKE
IPC分类号： G01M11/00 , G01M11/02
摘要： PROBLEM TO BE SOLVED: To prevent deterioration in spatial resolution even by an influence of external environment in optical frequency domain reflectometry.SOLUTION: A frequency of a receiving signal formed by synthesizing back-scattered light from the inside of a measuring object optical circuit 13 and reference light is divided into M sections, each of the M sections is made to pass through band-pass filters 20to 20, and then the frequency thereof is reduced to such a bandwidth that a receiving system can respond, using mixers 22to 22and a sine wave signal generator 21. A sampling device 16 acquires data and an optical frequency analyzer 17 integrates M data items, or the number of acquired sections, to provide a reflectometry waveform of the entire optical frequency domain.
摘要翻译：要解决的问题：即使在光频域反射测量中也可以通过外部环境的影响来防止空间分辨率的劣化。解决方案：通过将从测量对象光电路13的内部合成反向散射光和参考光形成的接收信号的频率分成M个部分，使M个部分通过带通将20 1 到20 M-1 ，然后将其频率减小到接收系统可以响应的带宽使用混合器22 1 到22 M-1 和正弦波信号发生器21.采样装置16获取数据和光频分析器17对M个数据项目或获取部分的数量进行积分，以提供整个光频域的反射波形。版权所有（C）2012，JPO＆INPIT

7. 发明专利

JP2008064503A Method and device for optical reflectometry 有权
标题翻译：用于光学反射测量的方法和装置
公开(公告)号：JP2008064503A
公开(公告)日：2008-03-21
申请号：JP2006240498
申请日：2006-09-05
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： FAN SHINYUU , ITO FUMIHIKO
IPC分类号： G01M11/00
CPC分类号： G01M11/3172
摘要： PROBLEM TO BE SOLVED: To provide a method and device for optical reflectometry measuring device capable of measurement by C-OFDR with a high-distance resolution.
SOLUTION: The device is provided with the monitoring part 12 for monitoring the nonlinearity of the frequency sweep of the coherent light source 1, based on this monitoring results, the measurement results in the measuring part 11 is corrected, i.e. at the monitoring part 12, by the self delayed homodyne detection, the monitoring beat signal of the light source output light is generated, the wave shape of which is sampled by the sampling part 16. The continuous function R(t) indicating the waveform is analyzed, and the zero cross points are obtained. The continuous function obtained by sampling the interference beat signal at the measuring part 11 is substituted with the zero cross points of the continuous function R(t), wherein the numerous train obtained is FFT processed. Then the measurement results are obtained.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供能够通过C-OFDR以高分辨率测量的光学反射测量装置的方法和装置。
解决方案：根据该监视结果，该装置具有用于监视相干光源1的频率扫描的非线性的监视部分12，校正测量部分11中的测量结果，即在监视通过自我延迟零差检测，产生光源输出光的监视拍频信号，其波形由采样部分16采样。分析表示波形的连续函数R（t），并且获得零交叉点。通过对测量部11的干扰拍频信号进行采样得到的连续功能被连续函数R（t）的零交叉点代替，其中所获得的多个列被FFT处理。然后获得测量结果。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2013152118A Measurement method and device of laser beam characteristics 有权
标题翻译：激光光束特性的测量方法和装置
公开(公告)号：JP2013152118A
公开(公告)日：2013-08-08
申请号：JP2012012319
申请日：2012-01-24
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： ITO FUMIHIKO , INOUE MASAAKI , KOSHIKIYA YUSUKE , FAN SHINYUU
IPC分类号： G01J9/02
摘要： PROBLEM TO BE SOLVED: To provide a method for more accurately measuring the degree of coherence of laser beams.SOLUTION: A linearly frequency-swept laser beam is split into 2 systems. One of the split beams is injected into an optical fiber 5 with an optical circulator 4. Rayleigh scattered light which is generated and reflected at the optical fiber 5 is collected so that the Rayleigh scattered light and the other split beam are multiplexed (3-2). A light receiving element 6 detects a photocurrent from the multiplexed light. The current value of the detected photocurrent is Fourier transformed, so that the frequency spectrum thereof is analyzed (7-11). In the analysis, the full scope of the absolute values of degree of coherence of the laser beam is uncovered as a function of delay time τ. The characteristics of a laser beam are thus measured for more details.
摘要翻译：要解决的问题：提供一种更准确地测量激光束相干程度的方法。解决方案：线性频率扫描激光束被分为2个系统。其中一个分束通过光环行器4注入到光纤5中。收集在光纤5处产生和反射的瑞利散射光，使得瑞利散射光和另一个分割光束被多路复用（3-2 ）。光接收元件6从复用光检测光电流。检测到的光电流的当前值被傅里叶变换，从而分析其频谱（7-11）。在分析中，激光束的相干度的绝对值的全部范围作为延迟时间τ的函数被揭示。因此测量激光束的特性以获得更多细节。

9. 发明专利

JP2012156945A Method and system for managing optical access facility 有权
标题翻译：用于管理光学访问设备的方法和系统
公开(公告)号：JP2012156945A
公开(公告)日：2012-08-16
申请号：JP2011016583
申请日：2011-01-28
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： INOUE MASAAKI , FAN SHINYUU , KOSHIKIYA YUSUKE , ARAKI NORIYUKI , ITO FUMIHIKO , IIDA DAISUKE
IPC分类号： H04B10/071 , G01M11/00 , G02B6/00 , H04B10/07 , H04B10/077
摘要： PROBLEM TO BE SOLVED: To enable the acquisition of facility attribute information without requesting an operator to have a waveform reading skill and a facility DB operation skill.SOLUTION: In an optical fiber of each optical access facility constituting an optical fiber network, an optical identification data is stamped. Facility information corresponding to each optical access facility is registered in a facility database 18. The optical identification data stamped in the optical fiber of each optical access facility is read by the output of test light into the optical fiber of each optical access facility and by the reception of the reflective light thereof. By the collation of the read optical identification data with the facility information in the facility database 18, the facility information of each optical access facility is provided.
摘要翻译：要解决的问题：使得能够获取设备属性信息，而不要求操作者具有波形读取技能和设施数据库操作技能。解决方案：在构成光纤网络的每个光接入设施的光纤中，印有光学识别数据。对应于每个光学访问设施的设施信息被登记在设施数据库18中。印有每个光学访问设施的光纤中的光学标识数据被测试光的输出读取到每个光学接入设备的光纤中，接收其反射光。通过将读取的光学识别数据与设施数据库18中的设施信息进行核对，提供每个光学访问设施的设施信息。版权所有（C）2012，JPO＆INPIT

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