公开(公告)号：US06813430B2

公开(公告)日：2004-11-02

申请号：US09795962

申请日：2001-02-28

申请人： Kazuhiko Aikawa ,  Manabu Saitou ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Takashi Suzuki ,  Koichi Harada ,  Akira Wada

发明人： Kazuhiko Aikawa ,  Manabu Saitou ,  Takaaki Suzuki ,  Shoichiro Matsuo ,  Takashi Suzuki ,  Koichi Harada ,  Akira Wada

IPC分类号： G02B622

CPC分类号： G02B6/02009 ,  G02B6/02228 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03666

摘要： In order to provide a dispersion-compensating optical fiber able to be applied over a broad wavelength band, having a large effective area, and as a result, suppressing the occurrence of non-linear effects, the present invention comprises a dispersion-compensating optical fiber that compensates chromatic dispersion of a 1.3 &mgr;m single-mode optical fiber over the entire wavelength range of 1.53-1.63 &mgr;m characterized in that, chromatic dispersion at a wavelength of 1.55 &mgr;m is −50 ps/nm/km or less, the dispersion slope is negative over the entire wavelength range of 1.53-1.63 &mgr;m, a cutoff wavelength is provided at which there is substantially single-mode propagation, bending loss is 30 dB/m or less, effective area is 20 &mgr;m2 or more, and the absolute value of chromatic dispersion during compensation of the chromatic dispersion of a 1.3 &mgr;m single-mode optical fiber serving as the target of compensation is 0.5 ps/nm/km or less.

公开(公告)号：US06687442B2

公开(公告)日：2004-02-03

申请号：US10047669

申请日：2002-01-14

申请人： Naoki Shamoto ,  Kuniharu Himeno ,  Akira Wada

发明人： Naoki Shamoto ,  Kuniharu Himeno ,  Akira Wada

IPC分类号： G02B602

CPC分类号： G02B6/105 ,  C03B37/01217 ,  C03B2203/31

摘要： An optical fiber for preserving the plane of polarization including a cladding and a stress imparting part disposed in the cladding, the stress imparting part comprising a base material including B2O3. The average concentration of B2O3 in the base material of the stress imparting part is in a range between about 17 and 21 wt. %, and the maximum concentration of B2O3 in the base material is in a range between about 17 and 22 wt. %. The optical fiber has excellent polarization plane preserving properties, and no concave portion is generated in its stress imparting part even under wet heat conditions.

摘要翻译： 一种用于保持包括包层的偏振平面的光纤和设置在包层中的应力施加部分，所述应力赋予部分包括包含B 2 O 3的基底材料。 应力赋予部的基材中的B 2 O 3的平均浓度在约17〜21重量％的范围内。 ％，并且基材中B 2 O 3的最大浓度在约17和22重量％之间的范围内。 ％。 该光纤具有优异的偏振面保存特性，即使在湿热条件下也不会在其应力赋予部中产生凹部。

公开(公告)号：US06298183B1

公开(公告)日：2001-10-02

申请号：US09088630

申请日：1998-06-02

申请人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

发明人： Ryozo Yamauchi ,  Akira Wada ,  Tetsuya Sakai ,  Nobuyuki Tanaka ,  Kensuke Shima ,  Kenji Nishide ,  Shigefumi Yamasaki

IPC分类号： G02B634

CPC分类号： G02B6/02147 ,  G02B6/02095

摘要： An optical fiber grating is manufactured by heating intermittently an optical fiber, provided with a core having residual stress in the longitudinal direction, softening a peripheral cladding of the core, and forming spatial periodical changes for the relative refractive index-difference between the core and the cladding, in the longitudinal direction of the aforementioned optical fiber by having the index of refraction of the core change, through the releasing of the aforementioned residual stress. As a result, an optical fiber grating and the manufacturing method thereof, which do not require expensive equipment and which exhibit high productivity, and furthermore a grating characteristic which is stable over time can be provided.

摘要翻译： 光纤光栅通过间歇地加热设置有在纵向上具有残余应力的芯的光纤，软化芯的外围包层，并且形成芯与芯的相对折射率差的空间周期性变化 通过释放上述残余应力，通过使芯的折射率变化，在上述光纤的长度方向上包覆。 结果，可以提供不需要昂贵的设备并且表现出高生产率的光纤光栅及其制造方法，此外还可以提供一种随时间稳定的光栅特性。

公开(公告)号：US6090330A

公开(公告)日：2000-07-18

申请号：US5375

申请日：1998-01-09

申请人： Tomohiro Gawa ,  Akira Wada ,  Ken Muneyuki ,  Souji Yamamoto ,  Masahiro Kawata ,  Akiko Nakamura ,  Kenji Kasai

发明人： Tomohiro Gawa ,  Akira Wada ,  Ken Muneyuki ,  Souji Yamamoto ,  Masahiro Kawata ,  Akiko Nakamura ,  Kenji Kasai

IPC分类号： B23K26/08 ,  B23K26/38 ,  H05K3/00 ,  B23K26/00

CPC分类号： B23K26/0853 ,  B23K26/08 ,  B23K26/082 ,  B23K26/382 ,  B23K26/40 ,  B23K26/402 ,  H05K3/0026 ,  B23K2203/16 ,  B23K2203/40 ,  B23K2203/42 ,  B23K2203/50 ,  H05K2203/0165

摘要： The two ends of an article to be processed which is in the form of a sheet are held by means of a fixed clamp and a movable clamp, the article being held by applying bias by means of a biasing cylinder to the movable clamp in a direction such as would separate it from the fixed clamp and hole-forming processing being performed by means of a laser beam. Since the sheet-like article is held under tension, flatness of even a thin sheet can be maintained and since the underneath space is open, there is no reflection of laser light after passing through the holes that are formed and any processing waste can easily be removed.

摘要翻译： 以片材形式被处理的物品的两端通过固定夹具和可移动夹具保持，所述物品通过偏压缸施加偏压而保持在可动夹具的方向上 例如将其与固定夹具分离，并且通过激光束执行孔形成处理。 由于片状制品保持张力，所以即使是薄片也能够保持平整度，并且由于下面的空间是开放的，所以在穿过形成的孔之后没有激光的反射，并且任何处理废物可以容易地 删除。

公开(公告)号：US5732170A

公开(公告)日：1998-03-24

申请号：US734709

申请日：1996-10-21

申请人： Satoshi Okude ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

发明人： Satoshi Okude ,  Tetsuya Sakai ,  Akira Wada ,  Ryozo Yamauchi

IPC分类号： G02B6/00 ,  G02B5/20 ,  G02B6/02 ,  G02B6/255 ,  G02B6/34 ,  G02B6/38 ,  G02B6/26

CPC分类号： G02B6/29317 ,  G02B6/021 ,  G02B6/02209 ,  G02B6/2551 ,  G02B6/2552 ,  G02B6/2938 ,  G02B6/29332 ,  G02B6/3845

摘要： The present invention relates to an optical fiber filter provided with a portion which selectively reflects or transmits light of a specific wavelength, this portion comprised of a multimode optical fiber in which the refractive index of the core changes periodically along the longitudinal direction thereof. Furthermore, this multimode optical fiber has an input end and an output end, with at least the input end of the multimode optical fiber being connected to a single mode optical fiber. As a result of forming an optical fiber filter in this way, it is possible to realize an optical fiber filter that exhibits no transmission loss at wavelengths other than the center wavelength.

摘要翻译： 本发明涉及一种设置有选择性地反射或透射特定波长的光的部分的光纤滤波器，该部分包括其中芯的折射率沿其纵向方向周期性地变化的多模光纤。 此外，该多模光纤具有输入端和输出端，至少多模光纤的输入端连接到单模光纤。 作为这样形成光纤滤波器的结果，可以实现在中心波长以外的波长下不显示传输损耗的光纤滤波器。

公开(公告)号：US5506481A

公开(公告)日：1996-04-09

申请号：US238066

申请日：1994-05-04

申请人： Akira Wada ,  Kouji Minami ,  Hitoshi Nakahara ,  Yoshiki Ono

发明人： Akira Wada ,  Kouji Minami ,  Hitoshi Nakahara ,  Yoshiki Ono

IPC分类号： H04N3/233 ,  H04N9/28 ,  G09G1/28 ,  H04N3/22

CPC分类号： H04N9/28 ,  H04N3/2335

摘要： A device for digital convergence correction of raster distortion correction of a picture displayed on a screen of a display device using a cathode-ray tube, in which scanning lines include a first class of scanning lines, called correction scanning lines, on which correction points are positioned, and a second class of scanning lines, called interpolated scanning lines between the correction scanning lines. The correction points are positioned at intersections of the correction scanning lines and vertical lines. The correction data for the interpolated scanning lines are produced by vertical interpolation from the correction data of a certain number of vertically aligned correction points. Convergence adjustment, however, may be conducted for only part of the correction points, and the correction data of the remaining correction points may be obtained by interpolation.

摘要翻译： 一种用于使用阴极射线管显示在显示装置的屏幕上的图像的光栅失真校正的数字会聚校正装置，其中扫描线包括称为校正扫描线的第一类扫描线，校正点为 以及在校正扫描线之间称为内插扫描线的第二类扫描线。 校正点位于校正扫描线和垂直线的交点处。 通过从一定数量的垂直排列的校正点的校正数据进行垂直内插，产生用于内插扫描线的校正数据。 然而，可以仅对部分校正点进行收敛调整，并且可以通过内插获得剩余校正点的校正数据。

公开(公告)号：US5474588A

公开(公告)日：1995-12-12

申请号：US308165

申请日：1994-09-16

申请人： Daiichirou Tanaka ,  Akira Wada ,  Tetsuya Sakai ,  Tetsuo Nozawa ,  Ryozo Yamauchi

发明人： Daiichirou Tanaka ,  Akira Wada ,  Tetsuya Sakai ,  Tetsuo Nozawa ,  Ryozo Yamauchi

IPC分类号： C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  C03C13/04 ,  G02B6/00 ,  C03B37/012

CPC分类号： C03B37/01433 ,  C03C13/045 ,  C03B2201/36

摘要： A manufacturing method for erbium doped silica, having a soot formation process, in which a silica glass soot is deposited on a seed rod for forming a soot preform in a porous state on the seed rod, a dopant impregnation process, wherein the soot preform is impregnated with at least an erbium compound, and a preform formation process, wherein this soot preform impregnated with a dopant is heated and rendered transparent. The dopant impregnation process is provided with an operation in which the soot preform obtained in the soot formation process is dipped in a solution containing an erbium compound, an aluminum compound, and a phosphorus compound; this is then desiccated, and soot preform which is impregnated with the erbium compound, the aluminum compound, and the phosphorus compound is obtained.

摘要翻译： 一种铒掺杂二氧化硅的制造方法，其具有烟炱形成方法，其中将硅石烟炱沉积在用于在种棒上形成多孔状态的烟炱预型体的种棒上，掺杂剂浸渍方法，其中所述烟炱预型体为 用至少铒化合物浸渍，以及预成型物形成工艺，其中浸渍有掺杂剂的该烟炱预制件被加热并变得透明。 掺杂剂浸渍方法具有将烟灰形成工艺中获得的烟灰预制件浸入含有铒化合物，铝化合物和磷化合物的溶液中的操作; 然后将其干燥，得到浸渍有铒化合物，铝化合物和磷化合物的烟炱预制品。

公开(公告)号：US5360464A

公开(公告)日：1994-11-01

申请号：US22479

申请日：1993-02-25

申请人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

发明人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

IPC分类号： G02B6/255 ,  G02B6/38 ,  C03B37/023

CPC分类号： G02B6/2558 ,  G02B6/2551

摘要： The present invention relates to a method for the fusion splicing of carbon coated optical fibers and to a method for providing reinforced performance of the spliced points. Concretely, carbon coated optical fibers are fusion spliced in an atmosphere containing less than 0.5 vol % of oxygen without the removal of the carbon coating. In order to minimize the amount of damage to the carbon coating resulting from the fusion, the decline in the failure probability of the optical fiber is controlled by means of applying moisture to the spliced part or by means of the adhesion of the oxidized carbon gases to the optical fiber. On the other hand, the carbon coating layer which was removed by oxidation at the time of the fusion splicing is recoated by means of a CVD reaction using a laser as a heat source. By means of this, the decline in the fatigue characteristics of the spliced part can be controlled.

摘要翻译： 本发明涉及一种用于碳涂覆光纤的熔接方法以及用于提供拼接点的加强性能的方法。 具体地说，碳涂覆的光纤在不含碳涂层的情况下，在含有少于0.5体积％的氧气的气氛中熔接。 为了最小化由熔融导致的碳涂层的损害量，通过对接合部分施加水分或通过将氧化的碳气体粘附到...来控制光纤的故障概率的下降 光纤。 另一方面，通过使用激光作为热源的CVD反应重新涂覆在熔接时通过氧化除去的碳涂层。 借此，能够控制拼接部的疲劳特性的下降。

公开(公告)号：US5223014A

公开(公告)日：1993-06-29

申请号：US717800

申请日：1991-06-19

申请人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

发明人： Ryozo Yamauchi ,  Akira Wada ,  Keiji Oohashi ,  Shinji Araki ,  Tsuyoshi Shimomichi

IPC分类号： G02B6/255 ,  G02B6/38

CPC分类号： G02B6/2558 ,  G02B6/2551

摘要： The present invention relates to a method for the fusion splicing of carbon coated optical fibers and to a method for providing reinforced performance of the spliced points. Concretely, carbon coated optical fibers are fusion spliced in an atmosphere containing less than 0.5 vol % of oxygen without the removal of the carbon coating. In order to minimize the amount of damage to the carbon coating resulting from the fusion, the decline in the failure probability of the optical fiber is controlled by means of applying moisture to the spliced part or by means of the adhesion of the oxidized carbon gases to the optical fiber. On the other hand, the carbon coating layer which was removed by oxidation at the time of the fusion splicing is recoated by means of a CVD reaction using a laser as a heat source. By means of this, the decline in the fatigue characteristics of the spliced part can be controlled.

公开(公告)号：US4991158A

公开(公告)日：1991-02-05

申请号：US319523

申请日：1989-03-06

申请人： Akira Wada

发明人： Akira Wada

IPC分类号： G11B7/0055 ,  G11B11/105 ,  G11B20/10 ,  G11B27/034 ,  G11B27/036 ,  G11B27/30

CPC分类号： G11B20/10 ,  G11B11/10519 ,  G11B11/10595 ,  G11B27/036 ,  G11B27/3063 ,  G11B7/0055 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/2545 ,  G11B27/034

摘要： An optical information recording and reporducing apparatus for recording and reproducing information optically against recording material, includes means for generating a first light beam for reproducing and erasing information which is previously recorded in the recording material, and means for providing a second light beam for recording new information into the recording material, and irradiation of the first light beam and the second light beam to an arbitrary point on the recording material is conducted in the above-mentioned order. Another type recording and reproducing apparatus includes an optical head which introduces a light beam onto optical information recording material and takes out a reproduced signal from the optical information recording material, means for applying a magnetic field whose polarity is in accordance with writing-in information to the recording material, and means for demodulating the signal reproduced from the optical head, and the light beam is made have no modulation and the level thereof is set at a level which gives a rise to above Curie temperture which is required for the writing-in at the writing-in operation, and the signal reproduced from the recorded information by the optical head direct before rewriting is demodulated and monitored.

摘要翻译： 一种光学信息记录和重新编码装置，用于对记录材料进行光学记录和再现信息，包括用于产生用于再现和擦除先前记录在记录材料中的信息的第一光束的装置，以及用于提供记录新的第二光束的装置 以上述顺序进行到记录材料中的信息，以及将第一光束和第二光束照射到记录材料上的任意点。 另一种类型的记录和再现装置包括一个将光束引入到光学信息记录材料上并从光学信息记录材料中取出再现信号的光学头，用于将极性与写入信息相对应的磁场施加到 记录材料和用于解调从光学头再现的信号和光束的装置不具有调制，并且其电平被设置在使写入所需的高于居里温度的水平 在写入操作期间，由重新写入之前由光头直接记录的信息再现的信号被解调和监视。