公开(公告)号：US4910738A

公开(公告)日：1990-03-20

申请号：US276858

申请日：1988-11-28

申请人： Toshihiro Fujita ,  Jun Ohya

发明人： Toshihiro Fujita ,  Jun Ohya

IPC分类号： H01S3/098 ,  H01S3/109 ,  H01S5/14

CPC分类号： H01S3/08036 ,  H01S3/109 ,  H01S5/14

摘要： By using a polarization controller, a semiconductor laser apparatus oscillating in the transverse magnetic mode in mode-locked state is realized, and a short optical pulse is generated. By coupling this mode-locked semiconductor laser to a wavelength conversion element, a second harmonic wave is generated, and an even shorter optical pulse is obtained at a higher power.

摘要翻译： 通过使用偏振控制器，实现了在锁模状态下以横向磁模式振荡的半导体激光装置，产生短的光脉冲。 通过将该锁模半导体激光器耦合到波长转换元件，产生二次谐波，并且以更高的功率获得更短的光脉冲。

公开(公告)号：US5436751A

公开(公告)日：1995-07-25

申请号：US982166

申请日：1992-11-24

申请人： Jun Ohya ,  Toshihiro Fujita

发明人： Jun Ohya ,  Toshihiro Fujita

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H04B10/2507 ,  H04B10/54 ,  G02F2/00 ,  H04B15/00

CPC分类号： H04B10/504

摘要： In an optical transmission system for transmitting a video signal by transmitting a laser light modulated with a video signal, through an optical fiber; and for receiving and photoelectrically converting the received laser light, a pilot signal is added to the video signal by a summing amplifier. A frequency of the pilot signal is smaller than a band width of the laser light, so that peak level of interference noise developed by multi-reflection at both ends of the optical fiber is decreased considerably. Moreover, in an optical transmission system for transmitting and receiving a video signal by modulating a laser light with the video signal through an optical fiber; and for receiving and photoelectrically converting the received laser light, a polarizing control element is provided in the optical fiber by coiling the optical fiber, so that a signal laser light transmitted without multi-reflection has different retardation from a signal laser light with multi-reflection, so that interference noise is reduced. Similarly, an optical fiber amplifier also employs the polarizing control element to reduce the adverse effect caused by the interference noise.

摘要翻译： 在用于通过发送通过视频信号调制的激光的视频信号的光传输系统中，通过光纤; 并且为了接收和光电转换所接收的激光，通过加法放大器将导频信号加到视频信号中。 导频信号的频率小于激光的带宽，使得在光纤两端由多反射产生的干扰噪声的峰值电平显着降低。 此外，在用于通过光纤通过用视频信号调制激光来发送和接收视频信号的光传输系统中， 并且为了接收和光电转换接收到的激光，通过卷绕光纤在光纤中提供了偏振控制元件，使得不具有多次反射的透射信号激光与具有多反射的信号激光具有不同的延迟 ，从而降低干扰噪声。 类似地，光纤放大器还采用偏振控制元件来减少由干扰噪声引起的不良影响。

公开(公告)号：US5321708A

公开(公告)日：1994-06-14

申请号：US39772

申请日：1993-03-26

申请人： Genji Tohmon ,  Hisanao Sato ,  Jun Ohya ,  Toshihiro Fujita

发明人： Genji Tohmon ,  Hisanao Sato ,  Jun Ohya ,  Toshihiro Fujita

IPC分类号： C03C4/00 ,  G02B6/00 ,  G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/08 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16 ,  H01S3/17 ,  H01S3/14

CPC分类号： H01S3/06716 ,  H01S3/17 ,  H01S2302/00 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/094065 ,  H01S3/0941 ,  H01S3/1606 ,  H01S3/173 ,  H01S3/176

摘要： A core of a fluorozirconate optical fiber is doped with rare earth ions, namely trivalent Dy ions. The Dy ion makes an absorption transition with excitation light generated by an 800 nm semiconductor laser module. Then the Dy ion undergoes transitions, namely a nonradiative transition involving phonon emission, a transition to a metastable excited level, and a radiative transition wherein radiation corresponding to the 1.28 .mu.m to 1.35 .mu.m range occurs, thereafter returning to its ground state level. The Dy ion having an electrovalence of three can be pumped with a high-output 800 nm semiconductor laser module and is not subject to saturation at a lower energy level of population inversion. Using an optical fiber of the invention, a higher gain is obtained in the region of 1.3 .mu.m telecommunications window.

摘要翻译： 氟锆酸盐光纤的核掺杂有稀土离子，即三价Dy离子。 Dy离子通过800nm半导体激光器模块产生的激发光进行吸收转变。 然后，Dy离子经历转变，即涉及声子发射的非辐射跃迁，到亚稳激发电平的转变，以及辐射跃迁，其中发生对应于1.28μm至1.35μm范围的辐射，然后返回到其基态。 具有三次电流的Dy离子可以用高输出800nm半导体激光器模块泵送，并且在较低的总体反转能量水平下不会饱和。 使用本发明的光纤，在电信窗口的1.3μm区域获得较高的增益。

公开(公告)号：US4794608A

公开(公告)日：1988-12-27

申请号：US708848

申请日：1985-03-05

申请人： Toshihiro Fujita ,  Jun Ohya ,  Kenichi Matsuda ,  Hiroyuki Serizawa

发明人： Toshihiro Fujita ,  Jun Ohya ,  Kenichi Matsuda ,  Hiroyuki Serizawa

IPC分类号： H01S5/00 ,  H01S5/026 ,  H01S5/06 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/065 ,  H01S5/10 ,  H01S5/125 ,  H01S5/14 ,  H01S3/19

CPC分类号： H01S5/0014 ,  H01S5/1021 ,  H01S5/026 ,  H01S5/0265 ,  H01S5/06 ,  H01S5/06213 ,  H01S5/06255 ,  H01S5/06258 ,  H01S5/065 ,  H01S5/0655 ,  H01S5/1025 ,  H01S5/125 ,  H01S5/14 ,  H01S5/142

摘要： A semiconductor laser device of a new monolithic structure has a long transparent optical waveguide used as a passive cavity directly coupled with an active cavity possessing a gain in the direction of the optical axis of the active cavity on a compound semiconductor substrate. The device is intended to satisfy all four characteristics, which are;(1) stable single longitudinal mode oscillation;(2) narrow spectral linewidth;(3) suppression of wavelength chirping due to current modulation; and(4) low noiseand to be applied as a light source for optical fiber communication, optical information processing or the like.

摘要翻译： 新的单片结构的半导体激光器件具有用作无源腔的长透明光波导，其与在化合物半导体衬底上的有源腔的光轴方向上具有增益的有源腔直接耦合。 该装置旨在满足所有四个特征，即 （1）稳定的单纵模振荡; （2）窄光谱线宽; （3）由于电流调制抑制波长啁啾; 和（4）低噪声，并被用作光纤通信，光学信息处理等的光源。

公开(公告)号：US5453867A

公开(公告)日：1995-09-26

申请号：US107997

申请日：1993-08-18

申请人： Jun Ohya ,  Toshihiro Fujita ,  Hisanao Sato

发明人： Jun Ohya ,  Toshihiro Fujita ,  Hisanao Sato

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  H01S5/06 ,  H04B10/2507 ,  H04B10/54 ,  H04B10/00

CPC分类号： H04B10/2507 ,  H04B10/504

摘要： An analog transmission system for transmitting a multi-channel analog signal including plural carrier signals having different frequencies, comprises: a laser unit responsive to the multi-channel analog signal for emitting laser light signal intensity-modulated by the multi-channel analog signal, the laser unit having an oscillation wavelength W1; an optical fiber amplifier for amplifying the laser light signal with a peak gain at a wavelength W2; an optical fiber for transmitting the amplified laser light; and an optical receiver for receiving the transmitted laser light and for converting the received laser light into an electric signal as an output. In this system, a total distortion characteristic of the laser unit is compensated by distortions developed in the optical fiber amplifier.

摘要翻译： 一种用于发送包括具有不同频率的多个载波信号的多通道模拟信号的模拟传输系统，包括：激光单元，响应于多通道模拟信号，用于发射由多通道模拟信号强度调制的激光信号， 具有振荡波长W1的激光单元; 用于在波长W2处以峰值增益放大激光信号的光纤放大器; 用于传输放大的激光的光纤; 以及用于接收发射的激光并将接收的激光转换为电信号作为输出的光接收器。 在该系统中，通过在光纤放大器中产生的失真来补偿激光单元的总失真特性。

公开(公告)号：US4899360A

公开(公告)日：1990-02-06

申请号：US276763

申请日：1988-11-08

申请人： Toshihiro Fujita ,  Jun Ohya ,  Kenichi Matsuda ,  Hiroyuki Serizawa

发明人： Toshihiro Fujita ,  Jun Ohya ,  Kenichi Matsuda ,  Hiroyuki Serizawa

IPC分类号： H01S5/026 ,  H01S5/06 ,  H01S5/062 ,  H01S5/0625 ,  H01S5/065 ,  H01S5/10 ,  H01S5/125 ,  H01S5/14

CPC分类号： H01S5/1021 ,  H01S5/026 ,  H01S5/0265 ,  H01S5/06 ,  H01S5/06213 ,  H01S5/06255 ,  H01S5/06258 ,  H01S5/065 ,  H01S5/0655 ,  H01S5/1025 ,  H01S5/125 ,  H01S5/14 ,  H01S5/142

摘要： A semiconductor laser device of a new monolithic structure has a long transparent optical waveguide used as a passive cavity directly coupled with an active cavity possessing a gain in the direction of the optical axis of the active cavity on a compound semiconductor substrate. The device is intended to satisfy all of four characteristics, which are;(1) stable single longitudinal mode oscillation;(2) narrow spectral linewidth;(3) suppression of wavelength chirping due to current modulation; and(4) low noiseand to be applied as a light source for optical fiber communication, optical information processing or the like.

摘要翻译： 新的单片结构的半导体激光器件具有用作无源腔的长透明光波导，其与在化合物半导体衬底上的有源腔的光轴方向上具有增益的有源腔直接耦合。 该装置旨在满足四个特征，即 （1）稳定的单纵模振荡; （2）窄光谱线宽; （3）由于电流调制抑制波长啁啾; 和（4）低噪声，并被用作光纤通信，光学信息处理等的光源。

公开(公告)号：US5341237A

公开(公告)日：1994-08-23

申请号：US830311

申请日：1992-01-31

申请人： Genji Tohmon ,  Hisanao Sato ,  Toshihiro Fujita ,  Jun Ohya

发明人： Genji Tohmon ,  Hisanao Sato ,  Toshihiro Fujita ,  Jun Ohya

IPC分类号： H01S3/07 ,  H01S3/06 ,  H01S3/067 ,  H01S3/083 ,  H01S3/16 ,  H01S3/17 ,  H01S3/14

CPC分类号： H01S3/17 ,  H01S3/06716 ,  H01S3/1608 ,  H01S3/1611 ,  H01S3/1613 ,  H01S3/1616 ,  H01S3/1698

摘要： The effective rate of deactivation from the terminal state to the ground state of a rare earth ion doped optical material in a four-level amplifying or lasing scheme may be increased greatly by doping the optical material with two rare earth ions, an activator and a deactivator. Energy transfer occurs between the terminal state in the activator ion and the deactivator ion. The transition from the deactivator to the ground state occurs via phonon emission. By increasing the deactivation rate, the efficiency of the laser and the amplifier is increased.

摘要翻译： 通过掺杂具有两种稀土离子的光学材料，激活剂和失活剂，可以大大增加在四级放大或激光方案中从稀土离子掺杂光学材料的终端状态到基态的失活的有效速率 。 能量转移发生在活化剂离子的末端状态和钝化剂离子之间。 从失活剂到基态的过渡通过声子发射发生。 通过增加去激活率，增加了激光器和放大器的效率。

公开(公告)号：US08649159B2

公开(公告)日：2014-02-11

申请号：US13068194

申请日：2011-05-04

申请人： Toshihiro Fujita ,  Hiroyasu Kidokoro ,  Hiromasa Hayashi

发明人： Toshihiro Fujita ,  Hiroyasu Kidokoro ,  Hiromasa Hayashi

IPC分类号： H05K5/02 ,  H05K7/02

CPC分类号： H01L25/072 ,  H01L24/40 ,  H01L2224/40245 ,  H01L2224/48247 ,  H01L2224/73221 ,  H01L2924/00014 ,  H01L2924/13091 ,  H01L2924/30107 ,  H01L2924/3011 ,  H01L2924/00 ,  H01L2224/37099

摘要： A controller has a control board, a power module and a power board. MOS transistors, inverter input terminals, coil terminals, inverter ground terminals, control terminals, a control power input terminal and a control ground terminal are integrally molded in a molded portion of a power module. Electrical connections between the power module and the control and power boards are made through the terminals provided in the molded portion.

摘要翻译： 控制器具有控制板，电源模块和电源板。 MOS晶体管，逆变器输入端子，线圈端子，逆变器接地端子，控制端子，控制电力输入端子和控制接地端子一体地模制在功率模块的模制部分中。 电源模块与控制电源板之间的电气连接通过设置在模制部分中的端子制成。

公开(公告)号：US5448743A

公开(公告)日：1995-09-05

申请号：US917497

申请日：1992-07-21

申请人： Dale E. Gulick ,  Joe W. Peterson ,  Munehiro Yoshikawa ,  Hiroshi Matsubara ,  Toshihiro Fujita ,  Kazushige Tsurumi

发明人： Dale E. Gulick ,  Joe W. Peterson ,  Munehiro Yoshikawa ,  Hiroshi Matsubara ,  Toshihiro Fujita ,  Kazushige Tsurumi

IPC分类号： G06F15/78 ,  G06F13/24 ,  G06F9/46

CPC分类号： G06F13/24

摘要： An I/O port interrupt mechanism includes a source register connected to the port for reporting sources of interrupts arising within the port, an interrupt mask register connected to the source register and operable to configure the I/O port for generation of interrupts, and an interrupt controller connected to the output of the source register and operable to hold off interrupts arising within the I/O port.

摘要翻译： I / O端口中断机制包括连接到端口的源寄存器，用于报告在端口内产生的中断源，中断屏蔽寄存器连接到源寄存器，并可用于配置I / O端口以产生中断，以及 中断控制器连接到源寄存器的输出，可用于阻止I / O端口内产生的中断。

公开(公告)号：US08310121B2

公开(公告)日：2012-11-13

申请号：US12822614

申请日：2010-06-24

申请人： Toshihiro Fujita ,  Hiroyasu Kidokoro ,  Atsushi Furumoto ,  Hideki Kabune ,  Hideki Minato

发明人： Toshihiro Fujita ,  Hiroyasu Kidokoro ,  Atsushi Furumoto ,  Hideki Kabune ,  Hideki Minato

IPC分类号： H02K11/00

CPC分类号： H02K3/522 ,  B62D5/0406 ,  H01L25/115 ,  H01L2924/0002 ,  H02K11/33 ,  H01L2924/00

摘要： A motor case is formed in a tubular shape. A semiconductor module includes a semiconductor chip of switching elements, a resin part and a coil terminal. The resin part embeds the semiconductor chip therein. The coil terminal is protruded from the resin part and directly connected to a coil. A connection part between the coil terminal and the coil is arranged at a position, which is between a top wall surface and a bottom wall surface of the resin part facing each other in the axial direction of a motor.

摘要翻译： 马达壳体形成为管状。 半导体模块包括开关元件的半导体芯片，树脂部件和线圈端子。 树脂部件将半导体芯片嵌入其中。 线圈端子从树脂部分突出并直接连接到线圈。 线圈端子和线圈之间的连接部分布置在位于电动机的轴向上彼此面对的树脂部分的顶壁表面和底壁表面之间的位置处。