公开(公告)号：US08977096B2

公开(公告)日：2015-03-10

申请号：US12768095

申请日：2010-04-27

申请人： Iwao Shimotakahara ,  Ryuichi Sugizaki ,  Takeshi Yagi

发明人： Iwao Shimotakahara ,  Ryuichi Sugizaki ,  Takeshi Yagi

IPC分类号： G02B6/036 ,  G02B6/02

CPC分类号： G02B6/02347 ,  G02B6/02019

摘要： An optical fiber suitable for high-capacity transmission having a large effective core area, a low bending loss, and capable of single mode operation at 1550 nm is provided. The optical fiber 10 has an effective core area ≧175 μm2 at 1550 nm, a bending loss ≦10 dB/m at a bending diameter of 20 mm at 1550 nm, and a cut-off wavelength λc≦1550 nm. The optical fiber has a first core 11 at the center, which has a refractive index higher than that of the cladding 13; and a second core 12 around the first core 11, which has a refractive index lower than that of the cladding 13; a primary medium portion; and secondary medium portions, which have a refractive index lower than that of the primary medium portion and the secondary medium portions have a plurality of first secondary medium portions 15 around the first core 11 and a plurality of second secondary medium portions 16 around the first core 11 and outside of the first secondary medium portions 15.

摘要翻译： 提供了适合于具有大的有效核​​心区域，低弯曲损耗并且能够在1550nm下进行单模操作的大容量传输的光纤。 光纤10在1550nm具有≥175μm2的有效核心面积，弯曲损耗＆nlE;在1550nm处的弯曲直径为20mm时为10dB / m，截止波长λc＆nlE为1550nm。 该光纤具有中心处的第一芯11，折射率高于包层13的折射率; 以及围绕第一芯体11的折射率低于包层13的折射率的第二芯体12; 主介质部分; 并且具有比初级介质部分和次级介质部分的折射率低的折射率的第二介质部分具有围绕第一芯体11的多个第一次级介质部分15和围绕第一芯部的多个第二次级介质部分16 11和第一次级介质部分15的外部。

公开(公告)号：USD698676S1

公开(公告)日：2014-02-04

申请号：US29431967

申请日：2012-09-12

申请人： Takeshi Yagi ,  Sekiji Nakamichi

设计人： Takeshi Yagi ,  Sekiji Nakamichi

公开(公告)号：US07787732B2

公开(公告)日：2010-08-31

申请号：US12180788

申请日：2008-07-28

申请人： Ryuichi Sugizaki ,  Iwao Shimotakahara ,  Harumi Inaba ,  Takeshi Yagi

发明人： Ryuichi Sugizaki ,  Iwao Shimotakahara ,  Harumi Inaba ,  Takeshi Yagi

IPC分类号： G02B6/02

CPC分类号： G02B6/02004 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/4403 ,  G02B6/4436

摘要： An optical fiber, made of silica-based glass, comprising a core and a cladding, each of the optical fiber having a mode field diameter of 5.5 μm or larger at a wavelength of 1100 nm, transmitting light with a wavelength of 1250 nm in a single mode, and having a bending loss of 1 dB/turn or smaller at a wavelength of 1100 nm when the optical fiber is bent with a curvature radius of 2 mm.

摘要翻译： 由二氧化硅基玻璃制成的光纤，其包括芯和包层，每个光纤的波长为1100nm的模场直径为5.5μm以上，将波长为1250nm的光透过 当光纤以曲率半径为2mm弯曲时，波长1100nm处的弯曲损耗为1dB /匝。

公开(公告)号：US20090252468A1

公开(公告)日：2009-10-08

申请号：US11500958

申请日：2006-08-09

申请人： Ryuichi Sugizaki ,  Akifumi Sako ,  Takeshi Yagi

发明人： Ryuichi Sugizaki ,  Akifumi Sako ,  Takeshi Yagi

IPC分类号： G02B6/02 ,  C03B37/028 ,  C03B37/012

CPC分类号： C03B37/01217 ,  C03B2201/12 ,  C03B2203/12 ,  G02B6/02 ,  G02B6/4203

摘要： A method for manufacturing an optical fiber includes the steps of covering an outer periphery of a first glass (11) having a first softening temperature and a non-axisymmetric structure by a second glass (12, 13) having a second softening temperature which is lower than the first softening temperature, heating the first and second glasses (11, 12, 13) for fusion together to thereby obtain an optical fiber preform; and drawing the preform to the optical fiber.

摘要翻译： 制造光纤的方法包括以下步骤：通过具有第二软化温度较低的第二玻璃（12,13）覆盖具有第一软化温度和非轴对称结构的第一玻璃（11）的外周边 比第一软化温度加热第一和第二玻璃（11,12,13）以熔化在一起，从而获得光纤预制件; 并将预成型件拉制成光纤。

公开(公告)号：US20080063349A1

公开(公告)日：2008-03-13

申请号：US11976780

申请日：2007-10-29

申请人： Naomi Kumano ,  Ryuichi Sugizaki ,  Kazunori Mukasa ,  Takeshi Yagi

发明人： Naomi Kumano ,  Ryuichi Sugizaki ,  Kazunori Mukasa ,  Takeshi Yagi

IPC分类号： G02B6/036

CPC分类号： G02B6/03688 ,  G02B6/02009 ,  G02B6/02028 ,  G02B6/02233 ,  G02B6/02238 ,  G02B6/02242 ,  G02B6/02271 ,  G02B6/02285 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03661 ,  G02B6/03677 ,  G02B6/29376 ,  H04B10/25253

摘要： Optical fibers to form an optical transmission line suitable for WDM transmission in a wide-spreading wavelength band, having the following characteristics and parameters: a dispersion in absolute value of 0.5 ps/nm/km to 9 ps/nm/km in a wavelength band of 1430 nm to 1625 nm, a dispersion slope in absolute value of 0.04 ps/nm2/km or less at a wavelength of 1550 nm, a mode field diameter of 7 μm or less at a wavelength of 1550 nm and a cable cutoff wavelength of less than 1430nm; core 11 surrounded by cladding 7, core 11 being at least two-layered (first layer 1 at the center and second layer 2 surrounding the first layer; relative refractive index of glass layer Δ1 with reference to the cladding being adjusted to not less than 0.6 but not more than 1.6%, relative refractive index of second layer Δ2 with reference to the cladding being adjusted to a negative value.

摘要翻译： 用于形成适用于宽扩频波段中的WDM传输的光传输线的光纤，具有以下特性和参数：波长带中绝对值的偏差为0.5ps / nm / km至9ps / nm / km 为1430nm至1625nm，波长1550nm处的绝对值为0.04ps / nm 2 / km或更小的色散斜率，波长为10μm以下的模场直径为7μm以下 1550nm，电缆截止波长小于1430nm; 芯11由包层7包围，芯11为至少两层（中心为第一层1，围绕第一层为第二层2;玻璃层Delta 1相对于包层的相对折射率调整为不小于 0.6但不超过1.6％，相对于包层将第二层Delta 2的相对折射率调整为负值。

公开(公告)号：US07295741B2

公开(公告)日：2007-11-13

申请号：US11200100

申请日：2005-08-10

申请人： Akifumi Sako ,  Ryuichi Sugizaki ,  Takeshi Yagi

发明人： Akifumi Sako ,  Ryuichi Sugizaki ,  Takeshi Yagi

IPC分类号： G02B6/36

CPC分类号： G02B6/0281 ,  G02B6/0288 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/0365 ,  G02B6/4436

摘要： An optical fiber includes a core and a cladding which are made from silica glass, allows single mode transmission at a wavelength of 1100 nm, and has a mode field diameter of not less than 4 μm at a wavelength of 1100 nm, and a bending loss of not more than 1 dB per turn with a curvature radius of 1 mm at a wavelength of 1100 nm.

摘要翻译： 光纤包括由石英玻璃制成的芯和包层，允许在1100nm的波长下的单模透射，并且在1100nm的波长下具有不小于4μm的模场直径，以及弯曲损耗 在1100nm的波长下的曲率半径为1mm的不超过每分钟1dB。

公开(公告)号：US07132702B2

公开(公告)日：2006-11-07

申请号：US10618374

申请日：2003-07-11

申请人： Tadashi Narui ,  Keiichi Akagawa ,  Takeshi Yagi

发明人： Tadashi Narui ,  Keiichi Akagawa ,  Takeshi Yagi

IPC分类号： H01L27/148

CPC分类号： H01L27/14687 ,  H01L27/1463 ,  H01L27/1464 ,  H01L27/14643 ,  H01L27/14654 ,  H01L27/14683 ,  H01L27/14689 ,  H01L27/14806

摘要： In the present invention, a charge transfer unit is arranged on a first-plane side of a thinly-formed semiconductor base. Charge accumulating units are arranged on a second-plane side, the opposite side. A depletion prevention layer is arranged closer to the second-plane side than the charge accumulating units. The depletion prevention layer prevents a depletion region around the charge accumulating units from reaching the second plane of the semiconductor base. The depletion prevention layer can suppress surface dark current going into the charge accumulating units. Meanwhile, an energy ray incident from the second-plane side pass through the depletion prevention layer to generate signal charges in the charge accumulating units (depletion regions). The charge accumulating units collect, on a pixel-by-pixel basis, the signal charges which are to be transported to the charge transfer unit under voltage control or the like, and then are read to exterior as image signals.

摘要翻译： 在本发明中，电荷转移单元布置在薄形半导体基底的第一平面侧上。 电荷累积单元布置在相反侧的第二平面侧上。 耗尽防止层比电荷累积单元更靠近第二平面侧布置。 耗尽防止层防止电荷累积单元周围的耗尽区域到达半导体基底的第二平面。 耗尽防止层可以抑制进入电荷累积单元的表面暗电流。 同时，从第二平面侧入射的能量射线通过耗尽防止层，以在电荷累积单元（耗尽区域）中产生信号电荷。 电荷累积单元在逐个像素的基础上收集要在电压控制等下传输到电荷转移单元的信号电荷，然后作为图像信号读取到外部。

公开(公告)号：US5615295A

公开(公告)日：1997-03-25

申请号：US527559

申请日：1995-09-13

申请人： Kazuaki Yoshida ,  Takayuki Morikawa ,  Takeshi Yagi

发明人： Kazuaki Yoshida ,  Takayuki Morikawa ,  Takeshi Yagi

IPC分类号： C03B37/027 ,  C03B37/15 ,  G02B6/02 ,  G02B6/255 ,  G02B6/36

CPC分类号： G02B6/2552 ,  C03B37/027 ,  C03B37/15 ,  G02B6/02 ,  C03B2203/18 ,  C03B2205/10

摘要： A process for the production of an optical fiber a core which is elliptical in cross-section at one end and circular at the other end and which has little transmission loss and less of a reduction in the difference in indexes of refraction between the core and cladding, which consists of heating an optical fiber (1) having a core (c) having a uniform cross-sectional area in the longitudinal direction and a cladding (2) formed with at least one through hole (4A) along the longitudinal direction of the core while successively changing the heating temperature along the longitudinal direction of the optical fiber so as to continuously change the shape of the through hole, continuously change the cross-sectional shape of the core along the longitudinal direction of the optical fiber, and thereby make the cross-sectional shape of the core at one end of the optical fiber and the cross-sectional shape of the core at the other end different.

摘要翻译： 一种用于生产光纤的方法，该芯在一端具有椭圆形截面并且在另一端呈圆形，并且具有很小的传输损耗和较少的芯和包层之间的折射率差的减小 其特征在于，加热具有纵向均匀截面面积的芯（c）的光纤（1）和沿着所述纵向方向形成有至少一个通孔（4A）的包层（2） 在沿着光纤的长度方向连续地改变加热温度的同时，连续地改变通孔的形状，沿着光纤的长度方向连续地改变芯的横截面形状，从而使 在光纤的一端的芯的横截面形状和另一端的芯的横截面形状不同。

公开(公告)号：US5244485A

公开(公告)日：1993-09-14

申请号：US874179

申请日：1992-04-24

申请人： Hiroshi Hihara ,  Masato Oku ,  Takeshi Yagi ,  Noritsugu Enomoto ,  Tsuguo Sato ,  Kazuaki Yoshida ,  Takayuki Morikawa

发明人： Hiroshi Hihara ,  Masato Oku ,  Takeshi Yagi ,  Noritsugu Enomoto ,  Tsuguo Sato ,  Kazuaki Yoshida ,  Takayuki Morikawa

IPC分类号： C03B37/012

CPC分类号： C03B37/01282 ,  Y02P40/57

摘要： The method of manufacturing a silica glass preform comprises the steps of inserting a rod-like member mainly containing a ductile material, into a forming space of a mold, charging the remaining space of the forming space with a forming material containing silica glass powder or doped silica glass powder, compressing the mold charged with the forming material from outside such as to form a porous glass body of the forming material around the rod-like member, removing the rod-like member from the porous glass body, inserting a glass rod into the hole formed after removal of the rod-like member, purifying said porous glass body in which the glass rod is inserted, and consolidating said porous glass body purified in the above purifying step.

公开(公告)号：US4888792A

公开(公告)日：1989-12-19

申请号：US231487

申请日：1988-08-12

申请人： Takeshi Yagi ,  Kenzo Kobayashi

发明人： Takeshi Yagi ,  Kenzo Kobayashi

IPC分类号： H04J11/00 ,  H04L25/49 ,  H04L27/34

CPC分类号： H04L27/34

摘要： A multi-level quadrature amplitude modulation and demodulation system includes a first exchange circuit for cyclicly exchanging input digital signals and for outputting exchanged signals to D/A converters. The D/A converters provide analog signals to a QAM modulator which produces a modulated signal. In the receiver side of the system, a QAM demodulator demodulates the modulated signal to produce analog signals which are converted to digital exchanged signals by A/D converters. The digital exchanged signals are exchanged in a manner which is the reverse of that of the first exchange circuit to provide output digital signals on output terminals which respectively correspond to the input terminals. By cyclicly exchanging the input signals in this manner, the transmission quality for each of the input signal channels is maintained equal.

摘要翻译： 多级正交幅度调制和解调系统包括用于循环交换输入数字信号并将交换的信号输出到D / A转换器的第一交换电路。 D / A转换器向产生调制信号的QAM调制器提供模拟信号。 在系统的接收机侧，QAM解调器解调调制信号，产生由A / D转换器转换为数字交换信号的模拟信号。 以与第一交换电路相反的方式交换数字交换信号，以在分别对应于输入端的输出端上提供输出数字信号。 通过以这种方式循环交换输入信号，每个输入信号通道的传输质量保持相等。