公开(公告)号：US06415089B2

公开(公告)日：2002-07-02

申请号：US09919904

申请日：2001-08-02

申请人： Takatoshi Kato ,  Eisuke Sasaoka ,  Shigeru Tanaka

发明人： Takatoshi Kato ,  Eisuke Sasaoka ,  Shigeru Tanaka

IPC分类号： G02B616

CPC分类号： G02B6/036 ,  G02B6/02019 ,  G02B6/02223 ,  G02B6/02242 ,  G02B6/02271 ,  G02B6/0281 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03666

摘要： The present invention relates to an optical fiber which enables favorable optical communications in 1.3-&mgr;m and 1.55-&mgr;m wavelength bands, and an optical transmission system including the same. The optical fiber according to the present invention has only one zero-dispersion wavelength within a wavelength range of 1.20 &mgr;m to 1.60 &mgr;m, the zero-dispersion wavelength existing within a wavelength range of 1.37 &mgr;m to 1.50 &mgr;m, and has a positive dispersion slope at the zero-dispersion wavelength, thereby enabling favorable optical communications utilizing each signal light in the 1.3-&mgr;m and 1.55-&mgr;m wavelength bands sandwiching the zero-dispersion wavelength.

公开(公告)号：US06360046B1

公开(公告)日：2002-03-19

申请号：US09560399

申请日：2000-04-28

申请人： Eisuke Sasaoka ,  Takatoshi Kato ,  Akira Urano ,  Yoshio Yokoyama

发明人： Eisuke Sasaoka ,  Takatoshi Kato ,  Akira Urano ,  Yoshio Yokoyama

IPC分类号： G02B602

CPC分类号： G02B6/03661 ,  G02B6/02014 ,  G02B6/02238 ,  G02B6/0281 ,  G02B6/0286 ,  G02B6/03611 ,  G02B6/03627

摘要： The present invention relates to a dispersion-shifted optical fiber which comprises a structure for effectively eliminating the causes of deterioration in characteristics at the making stage thereof and is suitable for wavelength division multiplexing transmission. In the dispersion-shifted optical fiber according to the present invention, impurities to be added and the contents thereof are adjusted so as to reduce viscosity difference at each interface between individual glass regions. As a consequence of this structure, occurrence of structural irregularity and glass defect are effectively restrained in the vicinity of the interfaces between the regions.

摘要翻译： 色散位移光纤技术领域本发明涉及一种色散位移光纤，其特征在于，具有有效地消除其制造阶段的特性恶化的结构，适用于波分复用传输。 在根据本发明的色散位移光纤中，调节添加的杂质和其含量，以便降低各个玻璃区域之间的每个界面处的粘度差异。 作为这种结构的结果，在区域之间的界面附近有效地抑制了结构不规则性和玻璃缺陷的发生。

公开(公告)号：US06335995B1

公开(公告)日：2002-01-01

申请号：US09488643

申请日：2000-01-21

申请人： Takatoshi Kato ,  Eisuke Sasaoka ,  Shinji Ishikawa

发明人： Takatoshi Kato ,  Eisuke Sasaoka ,  Shinji Ishikawa

IPC分类号： G02B602

CPC分类号： G02B6/02014 ,  C03B37/01446 ,  C03B37/01466 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02238 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/0365 ,  G02B6/03666

摘要： The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of 1,550 nm, a dispersion level of 1.0 to 4.5 ps/nm/km in terms of absolute value, a dispersion slope not greater than 0.13 ps/nm2/km in terms of absolute value, an effective core cross-sectional area not less than 70 &mgr;m2, and a transmission loss not greater than 0.25 dB/km with respect to light in a 1.55-&mgr;m wavelength band.

摘要翻译： 本发明的目的在于提供一种可以有效地抑制非线性光学效应发生并具有适于长距离透光的结构的色散位移光纤。 色散位移光纤作为波长为1,550nm的各种特性具有以绝对值表示的1.0至4.5ps / nm / km的色散水平，不大于0.13ps / nm 2 / km的色散斜率 绝对值，有效芯截面积不小于70mum2，相对于1.55μm波长带中的光的传输损耗不大于0.25dB / km。

公开(公告)号：US06204739B1

公开(公告)日：2001-03-20

申请号：US09256258

申请日：1999-02-23

申请人： Koichi Sakamoto ,  Takatoshi Kato ,  Kenichi Iio ,  Sadao Yamashita

发明人： Koichi Sakamoto ,  Takatoshi Kato ,  Kenichi Iio ,  Sadao Yamashita

IPC分类号： H01P710

CPC分类号： H01P1/20318

摘要： Electrodes are formed on respective two main surfaces of a dielectric sheet wherein each electrode has an opening formed at a location corresponding to the location of the opening formed in the other electrode. The part defined by the openings serves as a dielectric resonator. Coupling lines are formed directly in the electrode opening. Transmission lines are formed on a circuit board. The coupling lines and the corresponding transmission lines are connected to each other via bonding wires. This structure makes it possible to minimize the external Q of a resonant circuit using the dielectric resonator. If an oscillator is produced using this resonant circuit, it is possible to achieve a large frequency modulation with and large output.

摘要翻译： 电极形成在电介质片的相应两个主表面上，其中每个电极具有形成在与形成在另一电极中的开口的位置相对应的位置处的开口。 由开口限定的部分用作介质谐振器。 耦合线直接形成在电极开口中。 传输线形成在电路板上。 耦合线和相应的传输线通过接合线相互连接。 这种结构使得可以将使用介质谐振器的谐振电路的外部Q最小化。 如果使用该谐振电路产生振荡器，则可以实现具有大输出的大频率调制。

公开(公告)号：US5946439A

公开(公告)日：1999-08-31

申请号：US989403

申请日：1997-12-12

申请人： Yoshiaki Terasawa ,  Yosuke Yamazaki ,  Fumiyoshi Ohkubo ,  Takatoshi Kato

发明人： Yoshiaki Terasawa ,  Yosuke Yamazaki ,  Fumiyoshi Ohkubo ,  Takatoshi Kato

IPC分类号： G02B6/036 ,  G02B6/22

CPC分类号： G02B6/02009 ,  G02B6/03633 ,  G02B6/02276

摘要： This invention relates to a single-mode optical fiber having a configuration for effectively reducing bending loss. In the single-mode optical fiber, while an optical core is constituted by inner and outer cores, an optical cladding is constituted by an inner cladding in which "tailing" occurs and an outer cladding. In particular, in a cross section of the optical fiber perpendicular to the signal light guiding direction, when the surface integral values of relative refractive index difference of the optical cladding and optical core with respect to the outer cladding having an average refractive index n.sub.0 are respectively S1 and S2, the optical fiber satisfies a relationship of S1/S2.gtoreq.0.8.

摘要翻译： 本发明涉及具有有效减少弯曲损耗的结构的单模光纤。 在单模光纤中，当光芯由内核和外芯构成时，光学包层由其中发生“拖尾”的内包层和外包层构成。 特别地，在垂直于信号光引导方向的光纤的横截面中，当光学包层和光纤芯相对于具有平均折射率n0的外包层的相对折射率差的表面积分值分别为 S1和S2，光纤满足S1 / S2> / = 0.8的关系。

公开(公告)号：US5852701A

公开(公告)日：1998-12-22

申请号：US796187

申请日：1997-02-07

申请人： Takatoshi Kato ,  Yoshiyuki Suetsugu ,  Masayuki Nishimura

发明人： Takatoshi Kato ,  Yoshiyuki Suetsugu ,  Masayuki Nishimura

IPC分类号： G02B6/02 ,  G02B20060101 ,  G02B6/036 ,  G02B6/22

CPC分类号： G02B6/02009 ,  G02B6/03611 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/03666 ,  G02B6/02276

摘要： The present invention relates to a dispersion-shifted fiber having a structure which can restrain the bending loss caused by enlargement in mode field diameter from increasing. This dispersion-shifted fiber is a single-mode optical fiber mainly composed of silica glass and has a cutoff wavelength not shorter than the wavelength of signal light at its length of 2 m and a zero-dispersion wavelength within the range of 1.4 .mu.m to 1.7 .mu.m. Further, the mode field diameter in this dispersion-shifted fiber is 9.0 .mu.m or more.

摘要翻译： 本发明涉及一种具有可以抑制模场直径增大引起的弯曲损耗增加的结构的色散位移光纤。 该色散位移光纤是主要由石英玻璃构成的单模光纤，其截止波长不短于信号光的长度为2μm的波长，零色散波长在1.4μm〜 1.7亩 此外，该色散位移光纤中的模场直径为9.0μm以上。

公开(公告)号：US08413214B2

公开(公告)日：2013-04-02

申请号：US12709241

申请日：2010-02-19

申请人： Takatoshi Kato ,  Katsuyuki Umezawa ,  Makoto Kayashima ,  Masaya Umemura ,  Akira Kanehira

发明人： Takatoshi Kato ,  Katsuyuki Umezawa ,  Makoto Kayashima ,  Masaya Umemura ,  Akira Kanehira

IPC分类号： G06F7/04

CPC分类号： H04L9/3273 ,  G06F21/31 ,  G06F2221/2101 ,  G06F2221/2111 ,  G06F2221/2129 ,  H04L9/321

摘要： In a terminal system for managing terminals coupled to a network, a terminal management server includes: a terminal information registration module for registering, in advance, information unique to each user of the terminal; an authentication module for executing authentication by comparing an ID and authentication information which are contained in an authentication request received from the terminal to user information set in advance; an authenticity determination module for determining, based on a predetermined investigation result received from the terminal, whether or not the terminal suffers falsification; and a unique information transmission module for transmitting, when the authentication is successful, and when the authenticity determination module has determined that the terminal does not suffer the falsification, the information unique to the each user to the terminal. The terminal outputs the information unique to the each user received from the terminal management server to a display unit.

摘要翻译： 在终端管理服务器的终端系统中，终端管理服务器包括：终端信息登记模块，用于预先登记终端的每个用户唯一的信息; 认证模块，用于通过将从终端接收到的认证请求中包含的ID和认证信息与预先设置的用户信息进行比较来执行认证; 一个真实性确定模块，用于根据终端收到的预定调查结果确定终端是否遭受伪造; 以及唯一的信息传输模块，用于在认证成功时发送，并且当真实性确定模块确定终端没有遭受伪造时，将每个用户唯一的信息发送给终端。 终端将从终端管理服务器接收的每个用户唯一的信息输出到显示单元。

公开(公告)号：US08015417B2

公开(公告)日：2011-09-06

申请号：US10566943

申请日：2005-01-20

申请人： Takatoshi Kato ,  Nagamasa Mizushima ,  Takashi Tsunehiro ,  Makoto Kayashima ,  Kazushi Nakagawa

发明人： Takatoshi Kato ,  Nagamasa Mizushima ,  Takashi Tsunehiro ,  Makoto Kayashima ,  Kazushi Nakagawa

IPC分类号： H04L29/06 ,  H04L9/32 ,  G06F7/04 ,  G06F12/00 ,  H04N7/16

CPC分类号： G06F21/445 ,  G06F21/34

摘要： Disclosed is a secure remote access system for improving convenience of a user by utilizing a storage device including an anti-tampering device as a user authentication device in the secure remote access system for making access and execution of job while a user is making the encrypted communication to a server from an unspecified client. Usability can be improved and thereby the job executing function can be used smoothly at the internal and external sides of the working office by providing a server client system where the server can be manipulated remotely by distributing a storage device loading the authorized anti-tampering device to users, connecting the storage device to unspecified clients by users, and using the authentication information and application stored in the storage device. A remote access system having improved security and convenient during usage of client from the user can also be provided by reducing the secret information remaining in the manipulated client.

摘要翻译： 公开了一种安全的远程访问系统，用于通过利用包括防篡改设备的存储设备在安全远程访问系统中的用户认证设备来提高用户的便利性，用于在用户进行加密的通信时进行访问和执行 从未指定的客户端到服务器。 可以提高可用性，从而可以通过提供服务器客户端系统在工作场所的内部和外部平滑地使用作业执行功能，其中可以通过将加载授权的防篡改设备的存储设备分发到远程操作服务器 用户，用户将存储设备连接到未指定的客户端，并使用存储在存储设备中的认证信息和应用程序。 还可以通过减少被操纵的客户端中剩余的秘密信息来提供具有改进的安全性并且在从用户使用客户端期间方便的远程访问系统。

公开(公告)号：US20110069966A1

公开(公告)日：2011-03-24

申请号：US12881493

申请日：2010-09-14

申请人： Takatoshi Kato

发明人： Takatoshi Kato

IPC分类号： H04B10/02

CPC分类号： H04B10/40

摘要： An optical transceiver operable in multi transmission rates is disclosed. The optical transceiver includes an EDC to compensate the deformation appeared in the input signal due to the dispersion of the optical transmission line. The EDC operates as the transversal filter for higher transmission rates, while it operates as the low-pass-filter for lower transmission rates. In medium transmission rates, the EDC passes through the input signal.

摘要翻译： 公开了一种以多传输速率工作的光收发器。 光收发器包括EDC，以补偿由于光传输线的色散而在输入信号中出现的变形。 EDC作为具有较高传输速率的横向滤波器，而作为较低传输速率的低通滤波器工作。 在中等传输速率下，EDC通过输入信号。

公开(公告)号：US20100306511A1

公开(公告)日：2010-12-02

申请号：US12787421

申请日：2010-05-26

申请人： Yoshinori Mochizuki ,  Takatoshi Kato ,  Nobuaki Kohinata ,  Shigeki Taira

发明人： Yoshinori Mochizuki ,  Takatoshi Kato ,  Nobuaki Kohinata ,  Shigeki Taira

IPC分类号： G06F9/312

CPC分类号： H04L12/413 ,  H04J3/0638

摘要： There is a need for providing a communication data processor easily adaptable to network configurations required for industrial Ethernet. The apparatus successively analyzes received packets. The apparatus uses a register to determine whether or not to transmit the received packet as transmission data to another port. Rewritable memory saves a program code that provides control for analyzing a reception packet and generating a transmission packet. The apparatus is capable of complying with various communication protocols by changing the program code.

摘要翻译： 需要提供一种易于适应工业以太网所需的网络配置的通信数据处理器。 该装置连续分析接收的分组。 该装置使用寄存器来确定是否将接收的分组作为传输数据发送到另一个端口。 可重写存储器保存提供用于分析接收分组并生成传输分组的控制的程序代码。 该装置能够通过改变程序代码来遵循各种通信协议。