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1. 发明专利

JP2015021986A センサ用光ファイバ有权
标题翻译：光纤传感器
公开(公告)号：JP2015021986A
公开(公告)日：2015-02-02
申请号：JP2013147524
申请日：2013-07-16
申请人：日本電信電話株式会社 , Nippon Telegr & Teleph Corp , 国立大学法人東京大学 , Univ Of Tokyo , 国立大学法人東京大学
发明人： KUBOTA HIROKAZU , TSUJIKAWA KYOZO , MA LIN , HANZAWA NOBUTOMO , HOTATE KAZUO
IPC分类号： G02B6/02 , G01D5/353 , G02B6/024
摘要：【課題】簡易な工程で製造可能な光ファイバセンサを実現するセンサ用光ファイバを提供する。【解決手段】断面視において単一モードファイバのクラッド部11に、コア部12を中心とした正多角形の全ての頂点にその中心が配された配置以外の非等方的な配置で概略円形の空孔13が形成されている。空孔13の数は一つであること、又は、二つであることが好ましい。また、クラッド部11とコア部12との比屈折率差は0.7%以上であることが好ましい。【選択図】図2
摘要翻译：要解决的问题：提供一种能够实现能够通过简单步骤制造的光纤传感器的传感器光纤。解决方案：大致圆形孔13以非各向同性的布置形成，其不同于所有具有核心部分12为中心的正多边形的顶点具有正多边形的中心，在单模光纤的包层部分11的横截面图中。优选地，孔13的数量是一个或两个。此外，包层部11和芯部12的相对折射率差优选为0.7％以上。

2. 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

3. 发明专利

JP2011022082A Method and apparatus for optical reflectometry measurement 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：JP2011022082A
公开(公告)日：2011-02-03
申请号：JP2009169162
申请日：2009-07-17
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： FAN XINYU , ITO FUMIHIKO , KOSHIKIYA YUSUKE , KA SOGEN , HOTATE KAZUO
IPC分类号： G01M11/02 , G01M11/00 , G01N21/23
摘要： PROBLEM TO BE SOLVED: To measure a relatively highly reliable birefringence distribution and further PMD distribution even when the polarization characteristic of an object to be measured changes with time by an external environmental influence or the like. SOLUTION: In optical reflectometry measurement, by concurrently making two types of incident light having different polarization states incident into an object to be measured, a polarization state of back-scattered light relative to each incident light is concurrently measured and the birefringence distribution of the object to be measured from the result is calculated. Further, the longitudinal distribution of polarization mode dispersion (PMD) is calculated from the obtained birefringence distribution. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：即使当待测物体的极化特性由于外部环境影响等而随时间而变化时，也测量相对高可靠性的双折射分布和PMD分布。解决方案：在光反射测量中，通过同时进行入射到待测物体中的具有不同偏振态的两种类型的入射光，同时测量相对于每个入射光的反向散射光的偏振态，并且双折射分布根据结果计算要测量的物体。此外，从所获得的双折射分布计算偏振模色散（PMD）的纵向分布。版权所有（C）2011，JPO＆INPIT

4. 发明专利

JP2010271137A Method and apparatus for measuring optical frequency domain reflection 有权
标题翻译：用于测量光学频域反射的方法和装置
公开(公告)号：JP2010271137A
公开(公告)日：2010-12-02
申请号：JP2009122286
申请日：2009-05-20
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 XINYU , KA SOGEN , HOTATE KAZUO , YAMASHITA KENDY RODRIGO
IPC分类号： G01M11/00
摘要： PROBLEM TO BE SOLVED: To provide a method and apparatus for measuring optical frequency domain reflection, capable of reducing the number of measurements to shorten total measurement time, and in addition capable of reducing an optical frequency sweeping speed of a light source to a feasible level.
SOLUTION: Output light from the light source 11 is entered and split into two beams by a measurement light interferometer 12. One of split light beams is entered into an object 13 of measurement, its reflected light and backscattered light are acquired and synthesized by local emission light by the other split light beam to have them interfered. The interference light is optically received to measure a beat signal. The light source 11 is swept for a predetermined period, and the measured beat signal is sampled during the period by a sampling device 14 and sent to an arithmetic processing device 16. The arithmetic processing device 16 specifies a plurality of sections with a constant width in which the sweep measurement period is sequentially shifted by a constant time width, structures a plurality of data groups according to the respective sections from the sampled data, performs Fourier analysis for each of the plurality of data groups, and measures reflectivity in a light wave transmission direction on the object of measurement by adding and averaging a plurality of spectra obtained by the analysis. Thus, basically one measurement will do, thereby shortening the total measurement time.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于测量光频域反射的方法和装置，能够减少测量次数以缩短总测量时间，并且还能够将光源的光频扫描速度降低到一个可行的水平。解决方案：通过测量光干涉仪12将来自光源11的输出光进入并分成两束。一束分束光进入到测量对象13中，其反射光和反向散射光被获取并合成通过其他分光束的局部发射光使它们受到干扰。干涉光被光学地接收以测量拍频信号。光源11被扫描预定时间，并且测量的拍频信号在采样装置14期间被采样，并被发送到运算处理装置16.运算处理装置16指定多个具有恒定宽度的部分扫描测量周期顺序地移动恒定时间宽度，根据来自采样数据的各个部分构成多个数据组，对多个数据组中的每一个进行傅里叶分析，并测量光波传输中的反射率通过对通过分析获得的多个光谱进行加法和平均来测量对象的方向。因此，基本上将进行一次测量，从而缩短总测量时间。版权所有（C）2011，JPO＆INPIT

5. 发明专利

JP2013007908A Optical fiber coupler 有权
标题翻译：光纤耦合器
公开(公告)号：JP2013007908A
公开(公告)日：2013-01-10
申请号：JP2011140842
申请日：2011-06-24
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： KUBOTA HIROKAZU , TSUJIKAWA KYOZO , MA LIN , HOTATE KAZUO , HE ZU YUAN , KIKUCHI MASASHI
IPC分类号： G02B6/28 , G02B6/00 , G02B6/032
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber coupler which equalizes propagation constants of two photonic bandgap fibers and has high coupling efficiency.SOLUTION: In an optical fiber coupler 1, two photonic band gap fibers different by core diameter are joined, and grating spaces of clads constituting a first photonic band gap fiber 11 and a second photonic band gap fiber 21 respectively are different from each other to equalize respective propagation constants of the first photonic band gap fiber 11 and the second photonic bandgap fiber 21.
摘要翻译：要解决的问题：提供一种均衡两个光子带隙光纤的传播常数并具有高耦合效率的光纤耦合器。解决方案：在光纤耦合器1中，两芯线径不同的光子带隙光纤被接合，并且分别构成第一光子带隙光纤11和第二光子带隙光纤21的光栅空间分别与每个光纤带隙光纤不同另外要平衡第一光子带隙光纤11和第二光子带隙光纤21的相应传播常数。版权所有：（C）2013，JPO＆INPIT

6. 发明专利

JP2012027402A Method for manufacturing directional coupler using optical fiber 审中-公开
标题翻译：使用光纤制造方向耦合器的方法
公开(公告)号：JP2012027402A
公开(公告)日：2012-02-09
申请号：JP2010168496
申请日：2010-07-27
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： KUBOTA HIROKAZU , HOTATE KAZUO , HE ZU YUAN
IPC分类号： G02B6/287 , G02B6/00 , G02B6/032
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a directional coupler using optical fibers, capable of manufacturing a coupler having a desired performance including a case using a photonic crystal fiber and a photonic bandgap fiber that have a structure enclosing a core periphery with holes.SOLUTION: This method for manufacturing a directional coupler comprising two optical fibers 10 includes: a polishing step for removing parts of the respective side faces of the two optical fibers by polishing and forming removed surfaces 15; and a joining step for joining them together, with the removed surfaces facing each other. The polishing step comprises: propagating reference light in the core 11 of the optical fiber, polishing it while measuring an output light intensity of the reference light; and, when the output light intensity is attenuated to a predetermined intensity, finishing the polishing.
摘要翻译：解决问题的方案：提供一种使用光纤制造定向耦合器的方法，其能够制造具有期望性能的耦合器，其包括使用光子晶体光纤的情况和具有包围芯的结构的光子带隙光纤周边有孔。解决方案：用于制造包括两个光纤10的定向耦合器的方法包括：抛光步骤，用于通过抛光和形成去除的表面15来去除两个光纤的各个侧面的部分; 以及将它们连接在一起的接合步骤，其中移除的表面彼此面对。抛光步骤包括：将参考光传播到光纤的芯11中，在测量参考光的输出光强度的同时进行抛光; 并且当输出光强度衰减到预定强度时，完成抛光。版权所有（C）2012，JPO＆INPIT

7. 发明专利

JP2011227255A Spatial mode filter 有权
标题翻译：空间模式滤波器
公开(公告)号：JP2011227255A
公开(公告)日：2011-11-10
申请号：JP2010096225
申请日：2010-04-19
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： KUBOTA HIROKAZU , HOTATE KAZUO , HE ZU YUAN
IPC分类号： G02B27/46 , G02B5/18
摘要： PROBLEM TO BE SOLVED: To provide a spatial mode filter capable of easily separating a desired high-order mode.SOLUTION: A spatial mode filter comprises: a core portion including a hollow or a low refractive index medium; and a cladding portion provided with a diffraction grating composed of a dielectric material, the diffraction grating being arranged around the core portion and forming a photonic band gap. The diffraction grating includes a plurality of low-refractive index portions which are arranged in a regular manner and extend in a longitudinal direction of the diffraction grating. The grating interval of the diffraction grating is set by determining a basic mode and a high-order mode in a wavelength range of use based on the structure of the core portion and the cladding portion so as to locate only the high-order mode in the photonic band gap.
摘要翻译：要解决的问题：提供能够容易地分离所需高阶模式的空间模式滤波器。解决方案：空间模式滤波器包括：芯部分，包括中空或低折射率介质; 以及设置有由电介质材料构成的衍射光栅的包层部，所述衍射光栅围绕所述芯部配置并形成光子带隙。衍射光栅包括多个低折射率部分，它们以规则的方式布置并沿着衍射光栅的纵向方向延伸。通过基于芯部分和包层部分的结构确定使用的波长范围内的基本模式和高阶模式来设置衍射光栅的光栅间隔，以便仅将高阶模式定位在光子带隙。版权所有（C）2012，JPO＆INPIT

8. 发明专利

JP2011174760A Method and device of measuring reflection of optical frequency region 审中-公开
标题翻译：测量光频域反射的方法和装置
公开(公告)号：JP2011174760A
公开(公告)日：2011-09-08
申请号：JP2010037762
申请日：2010-02-23
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 XINYU , KA SOGEN , HOTATE KAZUO
IPC分类号： G01M11/02
摘要： PROBLEM TO BE SOLVED: To obtain output light of which the central frequency is changed while maintaining a coherency of a coherent light source. SOLUTION: Output light of a high coherent light source 11 is divided, by an optical comb generation part 12, into a plurality of light beam spectrums which are arranged at a predetermined interval by centering around its frequency. An arbitrary light beam spectrum is cut out by a light filter 13 and is frequency scanned over a predetermined width by an external modulator 14. The output light is branched into signal light and reference light by a first light direction coupler 15 and the signal light is made to be incident on a measurement target 16. The signal light reflected or rear-diffused in the measurement target 16 is picked up by the first light direction coupler 15 and is wave-combined with the reference light by a second light direction coupler 17 to be received and detected by a light receiver 18. At that time, an interference beat signal generated by interference between the signal light and the reference light is subjected to frequency analysis by a frequency analyzing device 19 so that a light intensity distribution of the reflection light and the rear-diffusion light from each position of the measurement target 16 is measured. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：获得中心频率改变的输出光，同时保持相干光源的一致性。解决方案：高相干光源11的输出光被光梳产生部分12分成多个光束光谱，它们以其频率为中心以预定的间隔布置。任意光束光谱由光滤波器13切出，并通过外部调制器14对预定宽度进行频率扫描。输出光被第一光方向耦合器15分支为信号光和参考光，信号光为使其入射到测量对象16上。在测量对象16中反射或后扩散的信号光被第一光方向耦合器15拾取，并且通过第二光方向耦合器17与参考光波结合到至由光接收器18接收和检测。此时，通过频率分析装置19对由信号光和参考光之间的干扰产生的干扰拍频信号进行频率分析，使得反射光的光强度分布并且测量来自测量对象16的每个位置的后向扩散光。版权所有（C）2011，JPO＆INPIT

9. 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。

10. 发明专利

JP2013190589A Polarizer 有权
标题翻译：偏光镜
公开(公告)号：JP2013190589A
公开(公告)日：2013-09-26
申请号：JP2012056582
申请日：2012-03-14
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： KUBOTA HIROKAZU , TSUJIKAWA KYOZO , MA LIN , HOTATE KAZUO , HE ZU YUAN , KIKUCHI MASASHI
IPC分类号： G02B5/30 , G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide a polarizer which is capable of reducing an influence of nonlinear optical effects of a dielectric.SOLUTION: A polarizer 1 has a fiber coupler structure having a coupling part 3 where two hollow core optical fibers 2 are coupled in a lengthwise direction. The portions transmitting light are hollow core parts of the hollow core optical fibers.
摘要翻译：要解决的问题：提供一种能够减少电介质的非线性光学效应的影响的偏振器。解决方案：偏振器1具有光纤耦合器结构，其具有耦合部分3，其中两个中空芯光纤2耦合在一个纵向。透射光的部分是中空芯光纤的中空芯部分。

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