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51. 发明授权

US07543982B2 Sensor and disturbance measurement method using the same 有权
标题翻译：传感器和干扰测量方法使用相同
公开(公告)号：US07543982B2
公开(公告)日：2009-06-09
申请号：US11665823
申请日：2006-09-29
申请人： Yoshinori Yamamoto , Itaru Sakabe , Eisuke Sasaoka , Hisashi Tanji
发明人： Yoshinori Yamamoto , Itaru Sakabe , Eisuke Sasaoka , Hisashi Tanji
IPC分类号： G01K3/00
CPC分类号： G01L1/243 , G01B11/18 , G01D5/35348 , G01K11/32 , G01M11/083
摘要： The present invention relates to a sensor or the like having a structure that enables accurate temperature measurement in a wide temperature range including a low-temperature region and is suitable for independently and accurately determining temperature variations and strains appearing in an object to be measured. The sensor comprises a laser light source, a sensor section that has a plurality of waveguides transmitting a laser light from the laser light source therethrough, a detecting section, and an analyzing section. The detecting section detects a plurality of Brillouin spectra obtained from the sensor section. The analyzing section determines at least one measurement value of a temperature in the sensor section and a strain generated in the sensor section, based on fluctuations of parameters defining the respective detected Brillouin spectra. In particular, the sensor section has a structure such that the variation of the Brillouin spectrum in response to a disturbance differs between the waveguides. Thus, by simultaneously monitoring the Brillouin spectra that varying a different manner in a plurality of waveguides, it is possible not only to measure accurately the temperature in a wide temperature range including a low-temperature region, but also to make distinction between the strain and temperature.
摘要翻译：本发明涉及具有能够在包括低温区域的宽温度范围内进行精确的温度测量的结构的传感器等，并且适用于独立且精确地确定出现在被测量物体中的温度变化和应变。传感器包括激光光源，传感器部分，其具有透射来自激光光源的激光的多个波导，检测部和分析部。检测部分检测从传感器部分获得的多个布里渊频谱。基于定义相应检测到的布里渊光谱的参数的波动，分析部分确定传感器部分中的温度的至少一个测量值和在传感器部分中产生的应变。特别地，传感器部分具有使得响应于干扰的布里渊频谱的变化在波导之间不同的结构。因此，通过同时监视在多个波导中改变不同方式的布里渊光谱，不仅可以在包括低温区域的宽温度范围内精确地测量温度，而且可以区分应变和温度。

52. 发明授权

US07197242B2 Chromatic-dispersion measuring apparatus and method 失效
标题翻译：色散测量装置及方法
公开(公告)号：US07197242B2
公开(公告)日：2007-03-27
申请号：US10162590
申请日：2002-06-06
申请人： Eisuke Sasaoka
发明人： Eisuke Sasaoka
IPC分类号： H04B10/00
CPC分类号： G01M11/35 , G01M11/333 , G01M11/335 , G01M11/338
摘要： The present invention provides a chromatic-dispersion measuring apparatus and method that can quickly measure chromatic dispersion in an optical fiber even when the optical fiber is short. Continuous light beams having the wavelengths λ1 and λ2 output from light sources are multiplexed by a multiplexer, are intensity-modulated by an intensity modulator, and are then output as optical signals. The output optical signals with the wavelengths λ1 and λ2 enter an optical fiber to be measured, and propagate therethrough. The optical signals emerging from the optical fiber are de-multiplexed by a de-multiplexer, and are received by corresponding photodetectors. Subsequently, the phase difference between the optical signals received by the photodetectors is detected by a phase detector. The chromatic dispersion of the optical fiber is calculated by an arithmetical circuitry on the basis of the detection result.
摘要翻译：本发明提供即使在光纤短的情况下也能够快速地测量光纤中的色散的色散测量装置和方法。从光源输出的具有波长λ1和λ2的波长的连续光束被多路复用器复用，被强度调制器强度调制，然后作为光输出信号。具有波长λ1和λ2的输出光信号进入要测量的光纤，并通过其传播。从光纤出射的光信号由去多路复用器解复用，并被相应的光电探测器接收。随后，由相位检测器检测由光电检测器接收的光信号之间的相位差。基于检测结果，通过算术电路计算光纤的色散。

53. 发明申请

US20060188205A1 Optical transmission line 有权
标题翻译：光传输线
公开(公告)号：US20060188205A1
公开(公告)日：2006-08-24
申请号：US11359417
申请日：2006-02-23
申请人： Yoshinori Yamamoto , Eisuke Sasaoka
发明人： Yoshinori Yamamoto , Eisuke Sasaoka
IPC分类号： G02B6/02
CPC分类号： H04B10/2537
摘要： Provided is an optical transmission line in which the suppression of SBS and the achievement of other transmission characteristics can compatibly be attained. The optical transmission line is formed by connecting a first optical fiber and a second optical fiber, or by connecting a group of first optical fibers and a group of second optical fibers, in which the difference in Brillouin frequency shift therebetween is 200 MHz or more. In at least one of the first optical fiber and the second optical fiber, the transmission loss may be 0.32 dB/km or less at a wavelength of 1383 nm. In each of the first and second optical fibers, the mode field diameter may be not less than 8.2 μm and not more than 9.8 μm, the cable cutoff wavelength may be equal to or less than 1260 nm, and the zero dispersion wavelength may be not less than 1300 nm and not more than 1324 nm. The difference between the average Brillouin frequency shift of each optical fiber group and the Brillouin frequency shift of each optical fiber contained in the respective optical fiber group may be equal to or less than 40 MHz.
摘要翻译：提供了能够兼容SBS的抑制和其他传输特性的实现的光传输线。光传输线通过连接第一光纤和第二光纤，或者连接一组第一光纤和一组第二光纤，其中布里渊频率差在200MHz以上。在第一光纤和第二光纤中的至少一个中，在1383nm的波长下的传输损耗可以为0.32dB / km以下。在第一和第二光纤中的每一个中，模场直径可以不小于8.2μm和不大于9.8μm，电缆截止波长可以等于或小于1260nm，并且零色散波长可以不是小于1300nm且不大于1324nm。每个光纤组的平均布里渊频移与每个光纤组中包含的每个光纤的布里渊频移之间的差可以等于或小于40MHz。

54. 发明授权

US06853766B2 Dispersion-compensating module 失效
标题翻译：色散补偿模块
公开(公告)号：US06853766B2
公开(公告)日：2005-02-08
申请号：US10218491
申请日：2002-08-15
申请人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno , Shigeru Tanaka
发明人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno , Shigeru Tanaka
IPC分类号： G02B6/255 , G02B6/34 , G02B6/26
CPC分类号： G02B6/29394 , G02B6/2551
摘要： The present invention relates to a dispersion-compensating module having a structure which compensates for the dispersion of an optical transmission line in a wavelength band of 1.55 μm and adjusts loss fluctuations among wavelengths in the wavelength band of 1.55 μm into an appropriate range. The module comprises a structure adapted to be installed in an already installed optical fiber transmission line, and has a loss slope with a polarity opposite to that of the optical fiber transmission line in the wavelength band of 1.55 μm. An example of the module comprises a dispersion-compensating optical fiber as a dispersion-compensating device, and an optical fiber doped with a transition metal element as a loss-equalizing device. Consequently, the loss fluctuations among individual wavelengths in the whole transmission line including the dispersion-compensating module are adjusted by the loss-equalizing device in the dispersion-compensating module so as to fall within an appropriate range.
摘要翻译：本发明涉及一种具有补偿光传输线在1.55μm波段的色散的结构的色散补偿模块，并且将波长为1.55μm的波长之间的损耗波动调整到适当的范围内。该模块包括适于安装在已经安装的光纤传输线中的结构，并且具有与1.55μm波长带中的光纤传输线的极性相反的损耗斜率。该模块的一个例子包括作为色散补偿装置的色散补偿光纤，以及掺杂过渡金属元素作为损耗均衡装置的光纤。因此，通过色散补偿模块中的损耗均衡装置来调整包括色散补偿模块在内的整个传输线中的各个波长之间的损耗波动，使其落入适当的范围内。

55. 发明授权

US06766088B2 Optical fiber and method for making the same 失效
标题翻译：光纤及其制作方法
公开(公告)号：US06766088B2
公开(公告)日：2004-07-20
申请号：US09810414
申请日：2001-03-19
申请人： Takemi Hasegawa , Masashi Onishi , Eisuke Sasaoka , Masayuki Nishimura
发明人： Takemi Hasegawa , Masashi Onishi , Eisuke Sasaoka , Masayuki Nishimura
IPC分类号： G02B602
CPC分类号： G02B6/03627 , B82Y20/00 , C03B37/01231 , C03B37/0253 , C03B37/027 , C03B37/02727 , C03B37/02763 , C03B37/02781 , C03B2203/14 , C03B2203/18 , C03B2203/36 , C03B2203/42 , C03B2205/08 , C03B2205/10 , C03B2205/20 , C03B2205/40 , C03B2205/72 , C03C25/6206 , G02B6/02033 , G02B6/02228 , G02B6/02247 , G02B6/02276 , G02B6/02366 , G02B6/02376 , G02B6/032 , G02B6/1225
摘要： An optical fiber has a section of the first kind having a chromatic dispersion not less than a given positive value x and a negative chromatic dispersion slope at a given wavelength and a section of the second kind has a chromatic dispersion not more than −x and a positive chromatic dispersion slope at the same wavelength. Another optical fiber has a chromatic dispersion higher than a positive value x and a negative chromatic dispersion slope at a given wavelength band.
摘要翻译：光纤具有第一种具有不小于给定正值x的色散和在给定波长处的负色散斜率的部分，并且第二类的部分具有不大于-x的色散和相同波长的正色散斜率。另一光纤具有高于正值x的色散和在给定波长带处的负色散斜率。

56. 发明授权

US06666591B2 Method for connecting optical fibers 有权
公开(公告)号：US06666591B2
公开(公告)日：2003-12-23
申请号：US09939662
申请日：2001-08-28
申请人： Eisuke Sasaoka , Motonori Nakamura , Osamu Kasuu
发明人： Eisuke Sasaoka , Motonori Nakamura , Osamu Kasuu
IPC分类号： G02B6255
CPC分类号： G02B6/2551 , G02B6/2552 , G02B6/262
摘要： Methods for connecting two optical fibers having different mode field diameters ((MFD) with low connection loss is proposed. One method comprises steps of preparing the third fiber (Fiber 3), a short length and MFD being smaller than that of the first fiber (Fiber 1) and larger than that of the second (Fiber 2), connecting the Fiber 1 to 3, connecting Fiber 2 to 3, and increasing MFD of Fiber 3 near the part connected or to be connected to Fiber 1, or MFD of Fiber 2 near the part connected or to be connected to Fiber 3 by heating the corresponding part. The other method comprises steps of preparing a short length Fiber 3 having smaller MFD than that of Fiber 1, increasing MFD of Fiber 3 near the part to be connected to Fiber 1 by heating the corresponding part, and then connecting Fiber 1 to 3, and 3 to 2 in that order.

57. 发明授权

US06636677B2 Optical fiber 有权
标题翻译：光纤
公开(公告)号：US06636677B2
公开(公告)日：2003-10-21
申请号：US09793415
申请日：2001-02-27
申请人： Takemi Hasegawa , Eisuke Sasaoka , Masayuki Nishimura , Masashi Onishi
发明人： Takemi Hasegawa , Eisuke Sasaoka , Masayuki Nishimura , Masashi Onishi
IPC分类号： G02B602
CPC分类号： G02B6/02333 , C03B37/01231 , C03B37/0253 , C03B37/027 , C03B37/02727 , C03B37/02763 , C03B37/02781 , C03B2203/14 , C03B2203/18 , C03B2203/36 , C03B2203/42 , C03B2205/08 , C03B2205/10 , C03B2205/20 , C03C25/6206 , G02B6/02033 , G02B6/02228 , G02B6/02247 , G02B6/02276 , G02B6/02347 , G02B6/02357 , G02B6/02361 , G02B6/02376 , G02B6/03627
摘要： In an optical fiber composed of a core region and a cladding region surrounding the core region and having a plurality of regions made of sub mediums having refractive indices different from a refractive index of a main medium disposed in a main medium constituting this cladding region, these regions made of the sub mediums are arranged in one given or a plurality of a given circular annular regions and the centers of the regions made of the sub mediums in respective circular annular regions are arranged on the same circumference centered at the center of the core.
摘要翻译：在由芯区域和围绕芯区域的包层区域构成的光纤中，具有由构成该包层区域的主介质的折射率不同于设置在构成该包层区域的主介质的折射率的副介质的多个区域构成的光纤，由副介质制成的区域布置在给定的一个或多个给定的圆形环形区域中，并且由各个圆形环形区域中的副介质制成的区域的中心布置在以芯的中心为中心的同一圆周上。

58. 发明授权

US06574404B2 Choromatic dispersion compensating module and optical transmission system using the same 失效
标题翻译：合成色散补偿模块和光传输系统使用该模块
公开(公告)号：US06574404B2
公开(公告)日：2003-06-03
申请号：US09771937
申请日：2001-01-30
申请人： Eisuke Sasaoka , Masao Tsukitani , Shigeru Tanaka
发明人： Eisuke Sasaoka , Masao Tsukitani , Shigeru Tanaka
IPC分类号： G02B616
CPC分类号： H04B10/25133 , H04J14/02
摘要： The present invention is related to a chromatic dispersion compensating module which realizes signal transmission at a high bit rate by its simple constitution, and an optical transmission system comprising the same. The chromatic dispersion compensating module according to the present invention comprises a chromatic dispersion compensator which compensates for the chromatic dispersion of an optical fiber transmission line at a predetermined wavelength, and a temperature controller which controls the temperature of the chromatic dispersion compensator in such a manner to set the chromatic dispersion of the chromatic dispersion compensator at a desired value. By this constitution, the dispersion compensation control in correspondence with the chromatic dispersion fluctuation in the optical fiber transmission line caused by the temperature fluctuation and the like is made possible. Hence, the cumulative chromatic dispersion as viewed from the entire optical fiber transmission line can be effectively reduced by its simple constitution.
摘要翻译：本发明涉及一种通过其简单结构实现高比特率的信号传输的色散补偿模块和包括该色散补偿模块的光传输系统。根据本发明的色散补偿模块包括补偿预定波长的光纤传输线的色散的色散补偿器，以及以这种方式控制色散补偿器的温度的温度控制器，将色散补偿器的色散设定在期望值。通过这种结构，可以实现与由温度波动等引起的光纤传输线中的色散波动相对应的色散补偿控制。因此，通过简单的结构可以有效地降低从整个光纤传输线观察的累积色散。

59. 发明授权

US06571045B2 Microstructured optical fiber 有权
标题翻译：微结构光纤
公开(公告)号：US06571045B2
公开(公告)日：2003-05-27
申请号：US09764148
申请日：2001-01-19
申请人： Takemi Hasegawa , Eisuke Sasaoka , Masayuki Nishimura
发明人： Takemi Hasegawa , Eisuke Sasaoka , Masayuki Nishimura
IPC分类号： G02B602
CPC分类号： G02B6/02338 , B82Y20/00 , G02B6/02004 , G02B6/02228 , G02B6/02261 , G02B6/02347 , G02B6/02361 , G02B6/03611
摘要： In an optical fiber having a core region and a cladding region, surrounding the core region, comprising a main medium having different refractive indices from the main medium and spaced apart in the main medium, the core region comprises a central core region having a hollow portion disposed at the center of the core region and an outer core region surrounding the central core region having a mean refractive index higher than the central core region, and the core region has a higher mean refractive index than the cladding region.
摘要翻译：在具有芯区域和包层区域的光纤中，围绕芯区域，包括与主介质具有不同折射率且在主介质中间隔的主介质，芯区域包括具有中空部分的中心芯区域设置在芯区域的中心，并且包围中心芯区域的外芯区域具有高于中心芯区域的平均折射率，并且芯区域具有比包层区域更高的平均折射率。

60. 发明授权

US06532331B1 Single-mode optical fiber floor long haul transmission 失效
标题翻译：单模光纤地板长途传输
公开(公告)号：US06532331B1
公开(公告)日：2003-03-11
申请号：US09698105
申请日：2000-10-30
申请人： Takatoshi Kato , Masashi Onishi , Eisuke Sasaoka
发明人： Takatoshi Kato , Masashi Onishi , Eisuke Sasaoka
IPC分类号： G02B602
CPC分类号： G02B6/03644 , G02B6/02014 , G02B6/02271 , G02B6/0283 , G02B6/03611 , G02B6/03627
摘要： The present invention relates to an optical fiber comprising a structure which effectively suppresses the occurrence of nonlinear phenomena without increasing transmission loss such as macrobending loss. The optical fiber according to the present invention comprises, radially in succession from the center axis thereof, a center region having a predetermined refractive index, a first annular region having a higher refractive index than the center region, and a second annular region doped with fluorine and having a lower refractive index than the first annular region. In particular, this optical fiber has an effective area of 70 &mgr;m2 or more with respect to light having a wavelength of 1550 nm, whereas the fluorine contents in the second annular region is adjusted such that the refractive index thereof decreases with distance from the center of the optical fiber.
摘要翻译：本发明涉及一种光纤，其包括有效抑制非线性现象的发生而不增加诸如宏弯损耗的传输损耗的结构。根据本发明的光纤从其中心轴径向连续地包括具有预定折射率的中心区域，具有比中心区域更高的折射率的第一环形区域和掺杂有氟的第二环形区域并且具有比第一环形区域更低的折射率。特别地，该光纤相对于波长为1550nm的光具有70mum2以上的有效面积，而第二环状区域中的氟含量被调整为使得其折射率随着距离光纤。

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