公开(公告)号：US07158728B2

公开(公告)日：2007-01-02

申请号：US10191319

申请日：2002-07-10

申请人： Yasunori Kasahara ,  Hideki Goto ,  Takashi Mizuochi ,  Kenkichi Shimomura ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Daishi Ishii ,  Toshio Kawazawa

发明人： Yasunori Kasahara ,  Hideki Goto ,  Takashi Mizuochi ,  Kenkichi Shimomura ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Daishi Ishii ,  Toshio Kawazawa

IPC分类号： H04B10/02

CPC分类号： H04B10/2918 ,  H04B10/0777 ,  H04B2210/074

摘要： An optical repeating system includes an optical transmitter and a plurality of optical amplifying repeaters. The optical transmitter specifies a part or all of the optical amplifying repeaters, and transmits a supervisory command to the specified optical amplifying repeaters as a first sub-signal via an uplink or downlink optical transmission line. The supervisory command is a command to supervise internal circuits of the optical amplifying repeaters. Receiving the supervisory command addressed thereto via the uplink or downlink optical transmission line, the optical amplifying repeaters each transmit a supervisory signal indicating a supervisory result corresponding to the supervisory command to optical receivers via the uplink and downlink optical transmission lines as a second sub-signal. The optical system can reduce the time take to acquire the supervisory information about the plurality of the optical amplifying repeaters.

摘要翻译： 光学重复系统包括光发射机和多个光放大中继器。 光发射机规定了一部分或全部光放大中继器，并经由上行或下行光传输线路将指示的光放大中继器的监控命令作为第一子信号发送。 监控命令是监控光放大中继器内部电路的命令。 通过上行链路或下行链路光传输线路接收到该监控命令，光放大中继器将经过上行和下行光传输线路的指示对应于监控命令的监控结果的监控信号发送给光接收机作为第二子信号 。 光学系统可以减少获取关于多个光学放大转发器的监控信息的时间。

公开(公告)号：US06614588B1

公开(公告)日：2003-09-02

申请号：US09725288

申请日：2000-11-29

申请人： Aritomo Uemura ,  Kiwami Matsushita ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Aritomo Uemura ,  Kiwami Matsushita ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Noboru Edagawa ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H01S300

CPC分类号： H04B10/29 ,  H04B10/2918 ,  H04B10/808

摘要： The optical amplifier according to the present invention is constructed such that the amount of the electric current fed to the power feeding line 2a is first detected by the current detection means, and then a setting signal is generated to each of the bypass circuits 22 and 23 in accordance with the thus detected amount of the fed current, and thereafter the output level of each of the optical repeater circuits 11 and 12 is controlled respectively by the bypass circuits 22 and 23, so that the output level of these repeater circuits 11 and 12 can be controlled in accordance with the amount of the current fed to the power feeding line 2a.

公开(公告)号：US06595746B1

公开(公告)日：2003-07-22

申请号：US09647531

申请日：2001-01-30

申请人： Akira Goto ,  Kosuke Ashihara ,  Takaki Sakurai ,  Masatoshi Suzuki ,  Mehrdad Zangeneh

发明人： Akira Goto ,  Kosuke Ashihara ,  Takaki Sakurai ,  Masatoshi Suzuki ,  Mehrdad Zangeneh

IPC分类号： F04D2944

CPC分类号： F04D29/444 ,  F04D29/448

摘要： A highly efficient mixed flow pump can prevent flow separation which is likely to occur in a corner portion of a flow passage of a diffuser section. The mixed flow pump includes a casing having an axis and defining an impeller section and a diffuser section disposed downstream of the impeller section with stationary diffuser blades protruding from a hub. The diffuser blades are formed so that an angular difference, between a hub blade angle and a casing blade angle, is chosen to conform to a specific distribution pattern along a flow passage of the diffuser section.

摘要翻译： 高效混合流量泵可以防止在扩散器部分的流动通道的角部可能发生的流动分离。 混合流量泵包括具有轴线并限定叶轮部分的壳体和设置在叶轮部分下游的扩散器部分，其具有从轮毂突出的固定扩散器叶片。 扩散器叶片形成为使得在轮毂叶片角度和壳体叶片角度之间的角度差被选择成符合沿着扩散器部分的流动通道的特定分布图案。

公开(公告)号：US06551472B2

公开(公告)日：2003-04-22

申请号：US09879153

申请日：2001-06-13

申请人： Eiji Saito ,  Masatoshi Suzuki ,  Minoru Tazoe ,  Makoto Ito ,  Yuji Segawa

发明人： Eiji Saito ,  Masatoshi Suzuki ,  Minoru Tazoe ,  Makoto Ito ,  Yuji Segawa

IPC分类号： C25D1700

CPC分类号： C25D1/10 ,  C25D1/00 ,  Y10S204/07

摘要： An electroforming apparatus comprising a container unit for storing the plating solution, a cathode part placed in the container unit and for holding an object to-be-plated and an anode part placed in the container unit face-to-face with the cathode part, wherein a current-conductive opening of the anode part is formed to have an area larger than that of a current-conductive opening of the cathode part.

摘要翻译： 一种电铸设备，包括用于存储电镀液的容器单元，放置在容器单元中并用于保持被镀物体的阴极部分和与阴极部分面对面地放置在容器单元中的阳极部分， 其中所述阳极部分的导电开口形成为具有大于所述阴极部分的导电开口的面积的面积。

公开(公告)号：US06519078B2

公开(公告)日：2003-02-11

申请号：US09887915

申请日：2001-06-21

申请人： Takayuki Miyakawa ,  Noboru Edagawa ,  Masatoshi Suzuki

发明人： Takayuki Miyakawa ,  Noboru Edagawa ,  Masatoshi Suzuki

IPC分类号： H01S330

CPC分类号： H01S3/302

摘要： The object of this invention is to improve SNR in the Raman amplification. An optical fiber (10) consists of a dispersion shift fiber in which a zero dispersion wavelength is shifted to the 1.55 &mgr;m band, and an optical fiber (12) consists of a single mode optical fiber having the effective core area of 100 &mgr;m2 which is larger than that of the optical fiber (10). An optical coupler 14 is disposed at the optical signal emission end of the optical fiber (12). A laser diode (16) outputs the laser light of 1455 nm as a Raman pumping light source. The output light from the laser diode (16) is introduced into the optical fiber (12) from the back, namely in the opposite direction to that of the optical signal propagation. The ratio of the Raman gain coefficient of the optical fiber (12) to that of the optical fiber (11) should be 1/1.08 or less, preferably 1/1.1 or less.

公开(公告)号：US06236488B1

公开(公告)日：2001-05-22

申请号：US09052072

申请日：1998-03-31

申请人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

发明人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

IPC分类号： H04B1004

CPC分类号： G02F1/0327 ,  G01J11/00 ,  G02F2203/26 ,  H04J14/08

摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.

摘要翻译： 光脉冲位置的检测使用具有确定的重复比率的光脉冲串和具有与光脉冲串的重复比相同频率的电时钟信号。 电时钟信号振荡器的相位移位并提供给光调制器。 光调制器基于电时钟信号调制光脉冲串，并输出调制光信号。 光检测器将从光调制器输出的调制光信号转换为电信号。 控制电时钟信号的相移量使光检测器的输出最大化。 另外，抖动信号可以用于相移的控制，可以采用多于光调制器，和/或多于彩色光源。 使用通过使光检测器的输出最大化而提供的前馈和反馈控制中的至少一个允许实现具有短宽度的光脉冲。

公开(公告)号：US5898714A

公开(公告)日：1999-04-27

申请号：US783589

申请日：1997-01-13

申请人： Itsuro Morita ,  Noboru Edagawa ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Itsuro Morita ,  Noboru Edagawa ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  H01S3/30 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/29 ,  H04B10/293 ,  H04B10/508 ,  H04B10/524

CPC分类号： H01S3/302 ,  H01S2301/085

摘要： An optical pulse generator, capable of generating ultrashort optical pulses suitable for optical soliton transmission, includes a DFB laser 10 for continuous laser oscillation, an electroabsorbtion modulator 12 for creating a sequence of optical pulses of the pulse width 14.6 ps from optical output of the laser 10. Output from an optical modulator 12 enters into a dispersion decreasing fiber 16 via an optical isolator 14. The dispersion decreasing fiber 16 has chromatic dispersion that decreases from 13.7 ps/nm/km to 2.3 ps/nm/km with distance, and its fiber length is 15 km. Pump laser beams from pump lasers 20, 24 are introduced to the dispersion decreasing fiber 16 by optical couplers 18, 22, and the fiber 16 functions as a Raman amplifier. When the Raman gain is 2.4 dB, the pulse width is compressed from 14.6 ps to 5.8 ps, approximately, even when the power of input pulses to the dispersion decreasing fiber 16 complies with the soliton condition.

摘要翻译： 能够产生适用于光孤子传输的超短光脉冲的光脉冲发生器包括用于连续激光振荡的DFB激光器10，用于从激光器的光输出产生脉冲宽度为14.6ps的光脉冲序列的电吸收调制器12 来自光调制器12的输出经由光隔离器14进入色散减小的光纤16.色散减小光纤16具有从距离13.7ps / nm / km降低到2.3ps / nm / km的色散，并且其色散 纤维长度为15公里。 来自泵浦激光器20,24的泵浦激光束通过光耦合器18,22引入到色散减小光纤16，并且光纤16用作拉曼放大器。 当拉曼增益为2.4dB时，即使当色散减小的光纤16的输入脉冲的功率符合孤子条件时，脉冲宽度也从大约14.6ps压缩到5.8ps。

公开(公告)号：US5883734A

公开(公告)日：1999-03-16

申请号：US827638

申请日：1997-04-10

申请人： Masatoshi Suzuki ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Shigeyuki Akiba

IPC分类号： G02F1/33 ,  G02F1/29

CPC分类号： G02F1/33 ,  Y10S372/703

摘要： An optical switch is formed by: at least one switch driving circuit for generating ultrasonic waves; at least one electric acousto-optic element forming at least one diffraction grating therein upon being applied with the ultrasonic waves generated by the switch driving circuit; at least one polarization rotator for rotating a polarization plane of a first primary diffracted light produced by the diffraction grating, by 90.degree.; and a light path through which an input light is entered into the electric acousto-optic element at a Bragg angle of the diffraction grating in a first direction side, the first direction being defined as either identical or opposite to a propagation direction of the ultrasonic waves, so that the first primary diffracted light is produced by the diffraction grating from the input light, a polarization plane rotated light produced by the polarization rotator is entered into the electric acousto-optic element at a Bragg angle of the diffraction grating in a second direction side, the second direction being opposite to the first direction, and a second primary diffracted light produced by the diffraction grating from the polarization plane rotated light is outputted as an output light.

摘要翻译： 光开关由以下部分形成：用于产生超声波的至少一个开关驱动电路; 在施加由开关驱动电路产生的超声波时，至少一个形成至少一个衍射光栅的电声元件; 至少一个偏振旋转器，用于将由衍射光栅产生的第一主衍射光的偏振面旋转90度; 以及光路，通过所述光路将输入光以第一方向侧的衍射光栅的布拉格角输入到所述电声元件中，所述第一方向被定义为与所述超声波的传播方向相同或相反 ，使得第一主衍射光由衍射光栅从输入光产生，由偏振旋转器产生的偏振面旋转光以第二方向的衍射光栅的布拉格角进入电声元件 侧，第二方向与第一方向相反，并且输出由衍射光栅从偏振面旋转的光产生的第二主衍射光作为输出光。

公开(公告)号：US5798871A

公开(公告)日：1998-08-25

申请号：US736674

申请日：1996-10-25

申请人： Atsushi Shibayama ,  Masatoshi Suzuki ,  Takanori Fujita

发明人： Atsushi Shibayama ,  Masatoshi Suzuki ,  Takanori Fujita

IPC分类号： G02B15/177 ,  G02B15/14

CPC分类号： G02B15/177

摘要： A zoom lens is composed of a first lens group of a negative refractive power, a second lens group of a positive refractive power and a third lens group of a positive refractive power, in which, in the zooming operation from the wide angle end to the telephoto end, the distance between the first and second lens groups decreases and the distance between the second and third lens groups varies.

公开(公告)号：US5737110A

公开(公告)日：1998-04-07

申请号：US770454

申请日：1996-12-20

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/40 ,  H04B10/50 ,  H04B10/508 ,  H04B10/556 ,  H04B10/58 ,  H04B10/60 ,  H04J14/08 ,  H04B10/00

CPC分类号： H04B10/25077 ,  H04J14/08

摘要： An optical transmitter which reverses the ON-OFF state of the optical intensity of a bright soliton lightwave and generates a dark soliton lightwave having an optical phase shift, an optical receiver for the dark soliton lightwave, and a superfast, high-capacity optical transmission system which is capable of increasing the soliton pulse array density while suppressing timing jitter. The optical transmission system is provided with the optical transmitter which transmits a dark soliton lightwave having digital information, the optical receiver which receives the dark soliton lightwave as a return-to-zero pulse and a transmission optical fiber interconnecting the transmitter and the receiver. The system has a construction in which the transmission optical fiber has, at the wavelength of the transmission lightwave, a normal dispersion value which makes negative the average wavelength dispersion value over the entire length of the optical fiber, and the average value of the wavelength dispersion value and the optical output intensity of the transmission optical fiber have values so that a non-linear optical effect and a wavelength dispersion effect, which are exerted on the transmission lightwave, are balanced with each other.

摘要翻译： 一种光发射器，其反转明亮的孤子光波的光强度的ON-OFF状态并产生具有光学相移的暗孤子光波，用于暗孤子光波的光接收器，以及超快大容量光传输系统 其能够在抑制定时抖动的同时增加孤子脉冲阵列密度。 光传输系统设置有发射具有数字信息的暗孤子光波的光发射机，接收暗孤子光波作为归零脉冲的光接收机和互连发射机和接收机的传输光纤。 该系统具有这样的结构，其中传输光纤在传输光波长的波长处具有在光纤的整个长度上使平均波长色散值为负的正常色散值，并且波长色散的平均值 值和发射光纤的光输出强度具有使得施加在透射光波上的非线性光学效应和波长色散效应彼此平衡的值。