公开(公告)号：US07164829B2

公开(公告)日：2007-01-16

申请号：US10232825

申请日：2002-09-03

申请人： Masao Tsukitani ,  Masahiko Matsui ,  Takatoshi Kato

发明人： Masao Tsukitani ,  Masahiko Matsui ,  Takatoshi Kato

IPC分类号： G02B6/02

CPC分类号： G02B6/02271 ,  G02B6/03633 ,  G02B6/29377

摘要： An optical fiber is formed for use in optical communications systems capable of transmitting and receiving a large volume of information. The optical fiber has a chromatic dispersion of at least 4 ps/nm/km and at most 15 ps/nm/km at a wavelength of 1,550 nm, a transmission loss of at most 0.190 dB/km at a wavelength of 1,530 to 1,570 nm, and an effective cutoff wavelength measured by the 2-meter method of 1610 nm or more. An optical transmission line and an optical communications system are structured by using the foregoing optical fiber.

摘要翻译： 形成用于能够发送和接收大量信息的光通信系统中的光纤。 光纤的波长为1,550nm时的色散至少为4ps / nm / km，最多为15ps / nm / km，波长为1,530〜1570nm时的传输损耗为0.190dB / km以下 ，通过2米法测定的有效截止波长为1610nm以上。 通过使用上述光纤构成光传输线路和光通信系统。

公开(公告)号：US20060248427A1

公开(公告)日：2006-11-02

申请号：US11455630

申请日：2006-06-20

申请人： Yukari Katayama ,  Takeshi Maeda ,  Harukazu Miyamoto ,  Takushi Nishiya ,  Takatoshi Kato ,  Shigeki Taira ,  Osamu Kawamae ,  Taku Hoshizawa

发明人： Yukari Katayama ,  Takeshi Maeda ,  Harukazu Miyamoto ,  Takushi Nishiya ,  Takatoshi Kato ,  Shigeki Taira ,  Osamu Kawamae ,  Taku Hoshizawa

IPC分类号： H03M13/00 ,  H04L1/00 ,  G08C25/00 ,  G06F11/00 ,  G06F11/30

CPC分类号： G11B27/329 ,  G11B20/1833 ,  G11B27/034 ,  G11B27/036 ,  G11B2220/216 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A random seed scramble for preventing the deterioration of a medium is applied to the next generation optical disk. A seed is stored to a BIS area. ID or an EDC is checked to hold interchangeability before and after scramble release. When no error is generated in data before the scramble release, it is recognized as an unscrambled disk. In contrast to this, when no error is generated in data after the scramble release, it is recognized as a scrambled disk. An information storing area showing an area to be rewritten by performing the scramble and an area to be rewritten without performing the scramble is arranged.

摘要翻译： 将用于防止介质劣化的随机种子加扰应用于下一代光盘。 种子存储到BIS区域。 检查ID或EDC以在争夺释放之前和之后保持互换性。 在扰频释放前的数据中没有产生错误时，会被识别为未加扰的磁盘。 与此相反，当在扰频释放之后的数据中没有产生错误时，它被识别为加扰的盘。 布置了通过执行扰频而示出要重写的区域的信息存储区域和不进行加扰的要被重写的区域。

公开(公告)号：US07095366B2

公开(公告)日：2006-08-22

申请号：US10757591

申请日：2004-01-15

申请人： Takatoshi Kato ,  Toru Ishii ,  Fuminori Nakamura

发明人： Takatoshi Kato ,  Toru Ishii ,  Fuminori Nakamura

IPC分类号： G01S7/28

CPC分类号： G01S7/35 ,  G01S13/34 ,  H03B5/1864 ,  H03D9/04 ,  H03L1/02

摘要： A high-frequency oscillation apparatus wherein an oscillation signal output from a voltage controlled oscillator (VCO) is transferred through a transfer line to a resonator and the resonator is excited. The resonator is coupled with a second transfer line and an RF signal having a level corresponding to the frequency of the oscillation signal is transferred through the second transfer line. When the resonant frequency of the resonator is set to a frequency higher than the oscillation-frequency modulation range of the VCO, the oscillation frequency and the RF-signal level have one-to-one correspondence. A detector detects the RF signal and outputs to a control section. The control section compensates a control voltage signal applied to the VCO according to the detected-signal level, and outputs the control voltage signal to the VCO to compensate the oscillation signal of the VCO.

摘要翻译： 一种高频振荡装置，其中从压控振荡器（VCO）输出的振荡信号通过传输线传送到谐振器，并且谐振器被激励。 谐振器与第二传输线耦合，并且具有与振荡信号的频率对应的电平的RF信号通过第二传输线传输。 当谐振器的谐振频率设定为高于VCO的振荡频率调制范围的频率时，振荡频率和RF信号电平具有一一对应关系。 检测器检测RF信号并输出​​到控制部分。 控制部分根据检测信号电平补偿施加到VCO的控制电压信号，并将控制电压信号输出到VCO以补偿VCO的振荡信号。

公开(公告)号：US07076140B2

公开(公告)日：2006-07-11

申请号：US10717202

申请日：2003-11-20

申请人： Yoshinori Yamamoto ,  Takashi Fujii ,  Takatoshi Kato ,  Eisuke Sasaoka

发明人： Yoshinori Yamamoto ,  Takashi Fujii ,  Takatoshi Kato ,  Eisuke Sasaoka

IPC分类号： G02B6/02

CPC分类号： G02B6/03666 ,  G02B6/02261 ,  G02B6/03644 ,  G02B6/278 ,  G02B6/29377 ,  H04B10/2525

摘要： The present invention relates to an optical fiber or the like which allows more precise compensation for the chromatic dispersion of a transmission optical fiber over a broad wavelength band. The optical fiber has a chromatic dispersion of −100 ps/nm/km or less in a wavelength band of 1535 to 1565 nm, 1565 to 1610 nm, 1554 to 1608 nm or 1535 to 1610 nm. In particular, the chromatic dispersion profile of the fundamental mode of this optical fiber defined by the orthogonal coordinate system of the wavelength and chromatic dispersion value has a shape such that, over the entire wavelength band except for the shortest and longest wavelengths thereof, the chromatic dispersion values on the chromatic dispersion profile are respectively located on the minus side of the associated chromatic dispersion values on a straight line connecting the chromatic dispersion values at the shortest and longest wavelength. Since the chromatic dispersion profile of the transmission optical fiber such as a conventional single-mode fiber or the like has a shape opposite to that of this optical fiber, the chromatic dispersion of the transmission optical fiber can be compensated for more precisely by using this optical fiber as a dispersion compensating optical fiber.

摘要翻译： 光纤等技术领域本发明涉及能够对宽波段的传输光纤的色散进行更精确的补偿的光纤等。 在1535〜1565nm，1565〜1610nm，1554〜1608nm或1535〜1610nm的波长带中，光纤的色散为-100ps / nm / km以下。 特别地，由波长和色散值的正交坐标系定义的该光纤的基本模式的色散曲线具有这样的形状，使得除了其最短和最长波长之外的整个波长带上，色度 色散曲线上的色散值分别位于连接最短和最长波长的色散值的直线上相关联的色散值的负侧。 由于诸如常规单模光纤等的传输光纤的色散曲线具有与该光纤相反的形状，所以可以通过使用该光学器件更精确地补偿传输光纤的色散 光纤作为色散补偿光纤。

公开(公告)号：US06865326B2

公开(公告)日：2005-03-08

申请号：US09776720

申请日：2001-02-06

申请人： Takatoshi Kato

发明人： Takatoshi Kato

IPC分类号： G02B6/02 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/2543 ,  H04B10/29 ,  H04B10/294 ,  H04B10/12 ,  G02B6/16

CPC分类号： H04B10/25253

摘要： An optical transmission line and an optical transmission system, the handling of which is easy, and in which transmission loss and the absolute value of cumulative chromatic dispersion is small over a wide wavelength range are proposed. The optical transmission system has a transmitter, a receiver and an optical transmission line. The optical transmission line has an optical transmission fiber and a dispersion-compensating fiber. The optical transmission fiber has a chromatic dispersion of +4˜+10 ps·nm−1·km−1 and a dispersion slope of 0˜+0.04 ps·nm−2·km−1 at the 1550 nm wavelength and is installed in a relay section. The dispersion compensating fiber has a chromatic dispersion of −40 ps·nm−1·km−1 or less and a dispersion slope of −0.10 ps·nm−2·km−1 or less at the 1550 wavelength and is wound in a coil to be put in a repeater.

摘要翻译： 提出了一种光传输线路和光传输系统，其处理容易，传输损耗和累积色散的绝对值在宽波长范围内较小。 光传输系统具有发射机，接收机和光传输线路。 光传输线具有光传输光纤和色散补偿光纤。 光传输光纤的色散为+ 4〜+ 10 ps.nm -1 .km -1，色散斜率为0〜+ 0.04 ps.nm <-2> km <-1。 1550 nm波长，并安装在继电器部分。 色散补偿光纤的色散为-40 ps.nm <-1> km <1或更小，色散斜率为-0.10 ps.nm <-2> km <-1以下 1550波长并缠绕在线圈中以放入中继器中。

公开(公告)号：US06856738B2

公开(公告)日：2005-02-15

申请号：US09732725

申请日：2000-12-11

申请人： Takatoshi Kato ,  Shigeru Tanaka ,  Masashi Onishi ,  Yuji Kubo

发明人： Takatoshi Kato ,  Shigeru Tanaka ,  Masashi Onishi ,  Yuji Kubo

IPC分类号： G02B6/036 ,  G02B6/22

CPC分类号： G02B6/02009 ,  G02B6/02257 ,  G02B6/03644 ,  G02B6/03666

摘要： An optical fiber and an optical transmission system are provided which enable a large-volume and long-haul transmission, using light signals having a plurality of wavelengths in a wide range of wavelength bands including 1.31 μm band, 1.45 μm band, 1.55 μm band and 1.58 μm band. The chromatic dispersion of the optical fiber according to the present invention is −20 ps•nm−1•km−3 or more but −3 ps•nm−1•km−1 or less in the whole wavelength range of 1300 nm to 1600 nm. The optical transmission system according to the present invention is also equipped with (1) a plurality of transmitters to transmit light signals having wavelengths in the range of 1300 nm to 1600 nm, (2) an optical fiber of the present invention, and (3) receivers which receive the light signals.

摘要翻译： 提供一种光纤和光传输系统，其使得能够进行大容量和长距离的传输，使用在宽范围的波段中具有多个波长的光信号，包括1.31个母带，1.45个母带，1.55个母带，以及 1.58个妈咪乐队。 根据本发明的光纤的色散在-20ps.nm -1 -3km以上，但-3ps.nm -1 -1km以下。 整个波长范围为1300 nm至1600 nm。 根据本发明的光传输系统还配备有（1）多个发射机，用于发射波长在1300nm至1600nm范围内的光信号，（2）本发明的光纤和（3 ）接收器接收光信号。

公开(公告)号：US06644870B2

公开(公告)日：2003-11-11

申请号：US10103134

申请日：2002-03-22

申请人： Noriko Iwata ,  Takatoshi Kato ,  Keiichiro Fukuda

发明人： Noriko Iwata ,  Takatoshi Kato ,  Keiichiro Fukuda

IPC分类号： G02B6255

CPC分类号： G02B6/2551 ,  G02B6/02004 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/2552 ,  G02B6/29377

摘要： The present invention relates to an optical fiber transmission line having a structure offering superior connection loss characteristics at the fusion-spliced position between optical fibers. This optical fiber transmission line has at least first and second optical fibers that are fusion-spliced. Each of these first and second optical fibers has a core region doped with 10 mol % or more of Ge and has a mode field diameter with a minimum value of 7 &mgr;m or less at the wavelength of 1550 nm. The difference between the minimum mode diameter of the first optical fiber and that of the second optical fiber is 1 &mgr;m or less.

摘要翻译： 本发明涉及一种具有在光纤之间的熔接位置提供优异的连接损耗特性的结构的光纤传输线。 该光纤传输线至少具有熔接的第一和第二光纤。 这些第一和第二光纤中的每一个具有掺杂有10mol％以上的Ge的芯区域，并且在1550nm的波长下具有最小值为7μm或更小的模场直径。 第一光纤的最小模式直径与第二光纤的最小模式直径的差为1um或更小。

公开(公告)号：US06275638B1

公开(公告)日：2001-08-14

申请号：US09297465

申请日：1999-04-28

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

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

IPC分类号： G02B622

CPC分类号： G02B6/02238 ,  G02B6/02014 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03633

摘要： A dispersion-shifted fiber includes structure configured to effectively reduce nonlinear optical effects and transmission loss caused by structural mismatching. A core region in the dispersion-shifted fiber includes an inner core and an outer core, which are both glass areas. The inner core is doped with a predetermined amount of fluorine, having an average relative refractive index difference &Dgr;n1. The outer core is disposed between the inner core and the cladding region and is doped with a predetermined amount of germanium dioxide, having an average relative refractive index difference &Dgr;n2(&Dgr;n2>&Dgr;n1), such that the viscosity ratio between the inner core and the outer core at a drawing temperature is set within a predetermined range, thereby effectively restraining structural mismatching from occurring at the boundary between these glass regions.

摘要翻译： 色散位移光纤包括有效地减少由结构不匹配引起的非线性光学效应和传输损耗的结构。 色散位移光纤中的核心区域包括两个玻璃区域的内芯和外芯。 内核掺杂有预定量的氟，具有平均相对折射率差ΔTATAn1。 外芯设置在内芯和包层区之间，并掺杂预定量的具有平均相对折射率差DELTAn2（DELTAn2> DELTAn1）的二氧化锗，使得内芯和外层之间的粘度比 芯在拉伸温度下设定在预定范围内，从而有效地抑制在这些玻璃区域之间的边界处发生结构失配。

公开(公告)号：US06262641B1

公开(公告)日：2001-07-17

申请号：US09326202

申请日：1999-06-04

申请人： Takatoshi Kato ,  Koichi Sakamoto ,  Atsushi Saitoh

发明人： Takatoshi Kato ,  Koichi Sakamoto ,  Atsushi Saitoh

IPC分类号： H03H738

CPC分类号： H03B19/14

摘要： In a dielectric transmission line device and a radio device using a dielectric transmission line device, an output matching circuit is constructed in a simplified fashion and an output signal of a frequency multiplier is output via a dielectric transmission line. The frequency multiplier is constructed in a small form in the dielectric transmission line device so as to obtain a dielectric transmission line device with a small total size and also obtain a small-sized high-efficiency radio device using such a dielectric transmission line device as a transmission line for transmitting a transmission signal. An input matching circuit is disposed between an input terminal and an FET for generating a harmonic. An open-ended transmission line is also provided which is coupled with an electromagnetic field of a dielectric transmission line in the form of a dielectric strip.

摘要翻译： 在介质传输线装置和使用电介质传输线装置的无线电装置中，以简化的方式构成输出匹配电路，经由介质传输线输出倍频器的输出信号。 在介质传输线路器件中以倍频器的形式构造倍频器，以获得总体尺寸小的介质传输线路器件，并且还可以获得使用这样的介质传输线路器件的小型高效无线电设备 用于发送发送信号的传输线。 输入匹配电路设置在输入端子和用于产生谐波的FET之间。 还提供了开口传输线，其与介质条形式的电介质传输线的电磁场耦合。

公开(公告)号：US06256440B1

公开(公告)日：2001-07-03

申请号：US09586966

申请日：2000-06-05

申请人： Takatoshi Kato ,  Eisuke Sasaoka ,  Masayuki Nishimura

发明人： Takatoshi Kato ,  Eisuke Sasaoka ,  Masayuki Nishimura

IPC分类号： G02B616

CPC分类号： G02B6/02014 ,  G02B6/02238 ,  G02B6/02252 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644

摘要： The present invention relates to a dispersion-shifted optical fiber suitable for an optical transmission line having an optical fiber amplifier with a wider amplification band. In particular, the dispersion-shifted optical fiber according to the present invention has a zero-dispersion wavelength of 1610 nm or more but 1750 nm or less, and a cutoff wavelength of 1.1 &mgr;m or more at a length of 2 m in order to suppress the bending loss to a practically permissible range, and has, with respect to light having a wavelength of 1550 nm, an effective area of 45 &mgr;m2 or more and a dispersion slope of 0.15 ps/nm2/km or less in order to suppress the occurrence of nonlinear phenomena.

摘要翻译： 本发明涉及一种适用于具有宽放大频带的光纤放大器的光传输线的色散位移光纤。 特别地，根据本发明的色散位移光纤具有1610nm以上但1750nm以下的零色散波长，在2μm的长度下的截止波长为1.1μm以上，以抑制 弯曲损耗达到实际允许的范围，并且对于波长为1550nm的光，为了抑制发生，有效面积为45mum2以上，色散斜率为0.15ps / nm2 / km以下 的非线性现象。