公开(公告)号：US07321709B2

公开(公告)日：2008-01-22

申请号：US10578711

申请日：2005-11-11

申请人： Tomoyuki Yokokawa ,  Eisuke Sasaoka

发明人： Tomoyuki Yokokawa ,  Eisuke Sasaoka

IPC分类号： G02B6/44

CPC分类号： G02B6/4434 ,  G02B6/441

摘要： An optical cable according to the present invention relates to an optical cable having a construction to enable reduction of a cable outer diameter, and/or improvement of contained efficiency of coated optical fibers while an increase of transmission loss in each coated optical fiber is suppressed. The optical cable has a loose-tube type of structure constructed by: a tension member; a plurality of tubes stranded together around the tension member; and an outer sheath covering the outer periphery of the plurality of tubes. One or more coated optical fibers are contained in each tube. A ratio of A/B is 6.3 or more but 7.0 or less, where each coated optical fiber has a mode field diameter A in a range of 8.6±0.4 μm at a wavelength of 1.31 μm, and where a fiber cutoff wavelength thereof is B μm.

摘要翻译： 根据本发明的光缆涉及具有能够减少电缆外径的结构和/或提高涂覆光纤的收纳效率的光缆，同时抑制每个涂覆光纤中的传输损耗的增加。 光缆具有松套管结构，其构造为：张紧构件; 围绕所述张力构件绞合在一起的多个管; 以及覆盖多个管的外周的外护套。 每个管中包含一个或多个涂覆的光纤。 A / B的比例为6.3以上且7.0以下，其中每个涂覆光纤的波长为1.31μm的模场直径A在8.6±0.4μm的范围内，并且其光纤截止波长为B 妈妈

公开(公告)号：US20070104429A1

公开(公告)日：2007-05-10

申请号：US10578711

申请日：2005-11-11

申请人： Tomoyuki Yokokawa ,  Eisuke Sasaoka

发明人： Tomoyuki Yokokawa ,  Eisuke Sasaoka

IPC分类号： G02B6/44

CPC分类号： G02B6/4434 ,  G02B6/441

摘要： An optical cable according to the present invention relates to an optical cable having a construction to enable reduction of a cable outer diameter, and/or improvement of contained efficiency of coated optical fibers while an increase of transmission loss in each coated optical fiber is suppressed. The optical cable has a loose-tube type of structure constructed by: a tension member; a plurality of tubes stranded together around the tension member; and an outer sheath covering the outer periphery of the plurality of tubes. One or more coated optical fibers are contained in each tube. A ratio of A/B is 6.3 or more but 7.0 or less, where each coated optical fiber has a mode field diameter A in a range of 8.6±0.4 μm at a wavelength of 1.31 μm, and where a fiber cutoff wavelength thereof is B μm.

摘要翻译： 根据本发明的光缆涉及具有能够减少电缆外径的结构和/或提高涂覆光纤的收纳效率的光缆，同时抑制每个涂覆光纤中的传输损耗的增加。 光缆具有松套管结构，其构造为：张紧构件; 围绕所述张力构件绞合在一起的多个管; 以及覆盖多个管的外周的外护套。 每个管中包含一个或多个涂覆的光纤。 A / B的比例为6.3以上且7.0以下，其中每个涂覆光纤的波长为1.31μm的模场直径A在8.6±0.4μm的范围内，并且其光纤截止波长为B 妈妈

公开(公告)号：US08805146B2

公开(公告)日：2014-08-12

申请号：US13009874

申请日：2011-01-20

申请人： Eisuke Sasaoka

发明人： Eisuke Sasaoka

IPC分类号： G02B6/36

CPC分类号： G02B6/02042 ,  G02B6/105

摘要： The present invention relates to a multicore optical fiber having a structure for effectively inhibiting polarization mode dispersion from increasing, and the multicore optical fiber comprises a plurality of multicore units and a cladding region integrally covering the plurality of multicore units while separating the multicore units from each other. Each of the plurality of multicore units includes a plurality of core regions arranged such as to construct a predetermined core arrangement structure on a cross section orthogonal to an axis. The core arrangement structure of each multicore unit on the cross section has such a rotational symmetry as to coincide with the unrotated core arrangement structure at least three times while rotating by 360° about a center of the multicore unit, thereby reducing the structural asymmetry of each multicore unit. This lowers the structural birefringence in each multicore unit, thereby inhibiting the polarization mode dispersion from increasing in the multicore optical fiber.

摘要翻译： 本发明涉及一种具有有效抑制偏振模色散的结构的多芯光纤的增加，多芯光纤包括多个多芯单元和一个覆盖多个多核单元的包层区，同时将多核单元与每个多核单元分离 其他。 多个多芯单元中的每一个包括多个芯区域，其布置成在垂直于轴线的横截面上构造预定的芯布置结构。 横截面上的每个多芯单元的核心布置结构具有这样的旋转对称性，即与未旋转的芯排列结构一致，至少三次，同时围绕多芯单元的中心旋转360°，从而减少每个多轴单元的结构不对称性 多核单位 这降低了每个多芯单元中的结构双折射，从而抑制了多芯光纤中的偏振模色散增加。

公开(公告)号：US07995198B2

公开(公告)日：2011-08-09

申请号：US12438464

申请日：2007-08-21

申请人： Eisuke Sasaoka ,  Yoshinori Yamamoto

发明人： Eisuke Sasaoka ,  Yoshinori Yamamoto

IPC分类号： G01N21/00

CPC分类号： G01B11/18 ,  G01D5/35348 ,  G01K11/32 ,  G01K2011/322 ,  G01M11/083 ,  G01M11/39

摘要： The present invention relates to an optical fiber characteristic distribution sensor comprising a structure to effectively reduce the measurement errors of position in the temperature distribution measurement etc. The sensor comprises an optical fiber section, part of which is installed in an object to be measured and to which probe light and pumping light are inputted in opposite directions. The optical fiber section includes a marker portion where data relating to the shape of a BGS in the maker has been preliminarily measured in a state where the optical fiber section is installed in a normal state. At the time of calculating the characteristic distribution in the longitudinal direction of the optical fiber section while measuring the data relating to the BGS shape, the errors of the calculated gain occurrence position are corrected, for example, by shifting the scanning range of phase difference between the probe light and the pumping light. The amount of shift of the scanning range of phase difference is given based on a difference value between the phase difference at the time of measurement when the BGS that reflects the gain that has occurred in the marker portion is measured, and the reference phase difference when data relating to the already known shape of the BGS in the marker portion has been preliminarily measured.

摘要翻译： 本发明涉及一种光纤特性分布传感器，包括有效降低温度分布测量等中位置的测量误差的结构。传感器包括光纤部分，其一部分安装在待测物体中，并且 探测光和泵浦光的方向相反。 光纤部分包括在光纤部分安装在正常状态的状态下已经预先测量了与制造商中的BGS的形状相关的数据的标记部分。 在测量与BGS形状相关的数据的同时计算光纤部分的纵向方向上的特性分布时，计算出的增益发生位置的误差被校正，例如通过将相位差的扫描范围 探头灯和抽光灯。 基于当测量反映在标记部分中发生的增益的BGS时的测量时的相位差之间的差值以及基准相位差，给出相位差的扫描范围的偏移量 已经预先测量了与标记部中的BGS的已知形状有关的数据。

公开(公告)号：US20110008058A1

公开(公告)日：2011-01-13

申请号：US12922100

申请日：2009-02-13

申请人： Eisuke Sasaoka

发明人： Eisuke Sasaoka

IPC分类号： H04B10/12

CPC分类号： G02B6/02328

摘要： The present invention relates to an optical communications system equipped with a structure, capable of applying a PBGF as an optical transmission line, by which high capacity information transmission is enabled by use of the PBGF. The optical communications system (1) is provided with an optical transmitter (10), an optical receiver (20) and an optical transmission line (30). The optical transmitter (10) outputs signal light, whose phase or optical frequency is modulated, into the optical transmission line (30). The optical transmission line (30) transmits the signal light outputted from the optical transmitter (10) to the optical receiver (20). The optical receiver (20) receives the signal light transmitted from the optical transmitter (10) via the optical transmission line (30). The optical transmission line (30) includes a photonic band gap fiber having a hollow core.

摘要翻译： 本发明涉及一种具有能够应用PBGF作为光传输线路的结构的光通信系统，通过使用PBGF可实现高容量信息传输。 光通信系统（1）设置有光发射机（10），光接收机（20）和光传输线路（30）。 光发送器（10）将其相位或光频率被调制的信号光输出到光传输线（30）中。 光传输线（30）将从光发射器（10）输出的信号光发送到光接收器（20）。 光接收器（20）经由光传输线（30）接收从光发射机（10）发射的信号光。 光传输线（30）包括具有中空芯的光子带隙光纤。

公开(公告)号：US20100092127A1

公开(公告)日：2010-04-15

申请号：US12443113

申请日：2007-09-19

申请人： Eisuke Sasaoka ,  Yoshinori Yamamoto

发明人： Eisuke Sasaoka ,  Yoshinori Yamamoto

IPC分类号： G01N21/00 ,  G02B6/00 ,  G01D5/353 ,  G01K11/32

CPC分类号： G01K11/32 ,  G01D5/35348 ,  G01L1/242 ,  G01M11/085

摘要： The present invention relates to an optical fiber distribution type detecting method and the like equipped with a structure for enabling efficient measurement of a temperature distribution or strain distribution. This method regulates a modulation frequency and modulation index for probe light and pumping light opposingly incident on an object from a light source and a phase difference between the probe light and pumping light, thereby successively setting the length and location of search domains in a region to be measured. In particular, a detection process is executed while resetting the search domain length shorter at a predetermined interval of time or when an abnormality is detected. Thus partly changing the distance resolution for a specific region in the course of the detection process enables efficient measurement operations in a short time.

摘要翻译： 本发明涉及一种配备有能够有效测量温度分布或应变分布的结构的光纤分布型检测方法等。 该方法调节从光源反射入射到物体上的探测光和泵浦光的调制频率和调制指数以及探测光和泵浦光之间的相位差，从而将区域中的搜索域的长度和位置依次设置为 被测量。 特别地，在以预定的时间间隔或当检测到异常时将搜索域长度更短地重置时，执行检测处理。 因此，在检测过程中部分地改变特定区域的距离分辨率能够在短时间内进行有效的测量操作。

公开(公告)号：US07534031B2

公开(公告)日：2009-05-19

申请号：US11791365

申请日：2006-10-05

申请人： Yoshinori Yamamoto ,  Itaru Sakabe ,  Eisuke Sasaoka

发明人： Yoshinori Yamamoto ,  Itaru Sakabe ,  Eisuke Sasaoka

IPC分类号： G01J5/00

CPC分类号： G01K11/32

摘要： The temperature measuring device of the present invention comprises: a light source for outputting light; an optical fiber to which light outputted by the light source is inputted and from which Brillouin scattered light is outputted; a detection unit for detecting a spectrum of the Brillouin scattered light; a judgment unit for judging whether or not a frequency shift of the spectrum of the Brillouin scattered light detected by the detection unit belongs to a specific region in which the rate of change of the frequency shift with respect to the temperature of the optical fiber is smaller than a predetermined value; and an analysis unit for, when the judgment unit judges that the frequency shift does not belong to the specific region, analyzing the temperature in use of the frequency shift, and for, when the judgment unit judges that the frequency shift belongs to the specific region, not performing analysis, or analyzing the temperature in use of at least the linewidth of the spectrum of the Brillouin scattered light detected by the detection means.

摘要翻译： 本发明的温度测量装置包括：用于输出光的光源; 输入光源输出的光并输出布里渊散射光的光纤; 用于检测布里渊散射光的光谱的检测单元; 判断单元，用于判断由检测单元检测到的布里渊散射光的频谱的频移是否属于频移相对于光纤的温度的变化率较小的特定区域 超过预定值; 以及分析单元，用于当判断单元判定频移不属于特定区域时，分析使用频移的温度，并且当判断单元判断频移属于特定区域时 ，不进行分析，或分析至少使用由检测装置检测的布里渊散射光的光谱的线宽的温度。

公开(公告)号：US20060245689A1

公开(公告)日：2006-11-02

申请号：US11452958

申请日：2006-06-15

申请人： Masao Tsukitani ,  Eisuke Sasaoka ,  Toshiaki Okuno

发明人： Masao Tsukitani ,  Eisuke Sasaoka ,  Toshiaki Okuno

IPC分类号： G02B6/28

CPC分类号： G02B6/02223 ,  G02B6/02242 ,  G02B6/02261 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/29317 ,  G02B6/29377 ,  G02B6/29394 ,  H04B10/25133 ,  H04B10/291 ,  H04B2210/258

摘要： In the dispersion-compensating system of the present invention, a demultiplexer demultiplexes optical signals in a signal wavelength band of 1520 nm to 1620 nm propagating through a first common transmission line into C band (1520 nm to 1565 nm) and L band (1565 nm to 1620 nm). Then, the demultiplexer outputs the optical signals of C band into a first branched transmission line and the optical signals of L band into a second branched transmission line. A first dispersion-compensating device is provided on the first common transmission line and compensates for the dispersion in C and L bands. A second dispersion-compensating device is provided on the second branched transmission line and compensates for the dispersion in L band, which has not fully been compensated for by the first dispersion-compensating device. Hence, the dispersion of optical transmission line can fully be reduced in a wide signal light wavelength band.

公开(公告)号：US20060093293A1

公开(公告)日：2006-05-04

申请号：US10519381

申请日：2004-08-04

申请人： Eisuke Sasaoka ,  Yoshinori Yamamoto

发明人： Eisuke Sasaoka ,  Yoshinori Yamamoto

IPC分类号： G02B6/02

CPC分类号： G02B6/02 ,  C03B37/01248 ,  C03C3/06 ,  C03C13/04 ,  G02B6/02004 ,  G02B6/02223 ,  G02B6/02242 ,  G02B6/02266 ,  G02B6/02285 ,  G02B6/26

摘要： The present invention provides an optical fiber enabling signal transmission in a wider band, which is applicable to optical transmission not only in the 1.3 μm wavelength band but also in the 1.55 μm wavelength band, as a transmission medium of a WDM optical communication system capable of transmitting signal light of multiple channels. The optical fiber is comprised of silica glass and has a core region along a predetermined axis and a cladding region provided on the outer periphery of the core region. The optical fiber comprising such a structure has, as the following typical optical characteristics, a cable cutoff wavelength of 1260 nm or less, a transmission loss of 0.32 dB/km or less at the wavelength of 1310 nm, and an OH-related loss increase of 0.3 dB/km or less at the wavelength of 1380 nm.

摘要翻译： 本发明提供一种能够在更宽的频带中进行信号传输的光纤，其可以应用于不仅在1.3μm波长带中，而且在1.55μm波长带中的光传输，作为WDM光通信系统的传输介质，能够 传输多个信道的信号灯。 光纤由石英玻璃构成，具有预定轴的芯部区域和设置在芯部区域的外周的包层区域。 包含这种结构的光纤具有以下典型的光学特性：电缆截止波长为1260nm或更小，波长1310nm处的传输损耗为0.32dB / km或更小，OH相关损耗增加 在1380nm的波长下为0.3dB / km以下。

公开(公告)号：US06952309B1

公开(公告)日：2005-10-04

申请号：US09667576

申请日：2000-09-22

申请人： Tetsufumi Tsuzaki ,  Masayuki Nishimura ,  Masayuki Shigematsu ,  Hitoshi Hatayama ,  Eisuke Sasaoka

发明人： Tetsufumi Tsuzaki ,  Masayuki Nishimura ,  Masayuki Shigematsu ,  Hitoshi Hatayama ,  Eisuke Sasaoka

IPC分类号： G02F1/01 ,  G02F1/313 ,  H01S3/00 ,  H01S3/067 ,  H01S3/10 ,  H01S3/13

CPC分类号： H01S3/06758 ,  H01S3/06754 ,  H01S3/10007 ,  H01S3/10023 ,  H01S3/1301 ,  H01S2301/04 ,  H04B10/2941 ,  H04B10/2942 ,  H04B10/296

摘要： A optical filter has a loss spectrum whose gradient dL/dλ of a loss L (dB) with respect to the wavelength λ (nm) is variable in the wavelength band of multiplexed signal light. A control circuit detects each power of signal light components demultiplexed by an optical coupler and controls the power of optical pumping light to be supplied to an optical amplification section from an optical pumping light sources such that the power of output signal light has a predetermined target value. The control circuit also controls the gradient dL/dλ of the optical filter on the basis of powers of the signal light components.

摘要翻译： 滤光器具有损耗谱，其相对于波长λ（nm）的损耗L（dB）的梯度dL /dlλ在复用信号光的波长带中是可变的。 控制电路检测由光耦合器解复用的信号光分量的每个功率，并且控制从光泵浦光源提供给光放大部分的光泵浦光的功率，使得输出信号光的功率具有预定的目标值 。 控制电路还基于信号光分量的功率来控制滤光器的梯度dL / dl。