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1. 发明授权

US5453867A Analog optical transmission system 失效
标题翻译：模拟光传输系统
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。

2. 发明授权

US5341237A Rare earth ion doped optical element 失效
标题翻译：稀土离子掺杂光学元件
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。

3. 发明授权

US5321708A Optical fiber amplifier doped with dysprosium ion for the 1.3 .mu.m wavelength band 失效
标题翻译：光纤放大器掺杂镝离子为1.3μm波段
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。

4. 发明授权

US5426656A Laser element doped with rare earth ions, optical amplifier element doped with rare earth ions and rare-earth-ion-doped short-wavelength laser light source apparatus 失效
标题翻译：掺杂稀土离子的激光元件，掺杂稀土离子的光放大元件和稀土离子掺杂短波长激光光源装置
公开(公告)号：US5426656A
公开(公告)日：1995-06-20
申请号：US184932
申请日：1994-01-24
申请人： Genji Tohmon , Jun Ohya , Hisanao Sato , Tomoaki Uno
发明人： Genji Tohmon , Jun Ohya , Hisanao Sato , Tomoaki Uno
IPC分类号： H01S3/067 , H01S3/094 , H01S3/16 , H01S3/14
CPC分类号： H01S3/16 , H01S2302/00 , H01S3/067 , H01S3/094092 , H01S3/1611
摘要： The optical fiber is doped at the core thereof with Tm ions and Nd ions. When light at a wavelength in a 800-nm band for exciting the Nd ions, is incident upon the optical fiber through an incident portion thereof, the Nd ions emit light at a wavelength in the vicinity of 1,012 .mu.m. Through three excitations by absorption of light emitted from the Nd ions and/or energy transfer from the Nd ions, the Tm ions experience three excitation transitions and reach a third high energy level through first and second high energy levels. Thereafter, the Tm ions experience a radiative transition from the third high energy level, thereby to emit blue light at a wavelength of 480 nm.
摘要翻译：光纤在其核心掺杂有Tm离子和Nd离子。当用于激发Nd离子的800nm波长的波长的光通过其入射部分入射到光纤上时，Nd离子发射波长在1012μm附近的光。通过吸收从Nd离子发射的光和/或来自Nd离子的能量转移的三次激发，Tm离子经历三次激发跃迁，并通过第一和第二高能级达到第三高能级。此后，Tm离子经历从第三高能量水平的辐射跃迁，由此发射波长为480nm的蓝色光。

5. 发明授权

US4910738A Short optical pulse generators using mode-locked semiconductor lasers oscillating in transverse magnetic modes 失效
标题翻译：使用在横向磁模式下振荡的锁模半导体激光器的短光脉冲发生器
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。

6. 发明授权

US4899360A Semiconductor laser device having monolithically formed active and passive cavities on the same substrate 失效
标题翻译：半导体激光器件在同一衬底上具有单片形式的有源和无源腔
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。

7. 发明授权

US5436751A Analog optical transmission system and optical fiber amplifier 失效
标题翻译：模拟光传输系统和光纤放大器
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。

8. 发明授权

US4794608A Semiconductor laser device 失效
标题翻译：半导体激光器件
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。

9. 发明申请

US20120298090A1 METHOD OF CUTTING WORKPIECE WITH WIRE SAW, AND WIRE SAW 有权
标题翻译：用线锯切割工件的方法和电线
公开(公告)号：US20120298090A1
公开(公告)日：2012-11-29
申请号：US13576738
申请日：2010-02-08
申请人： Jun Ohya , Tatsumi Hamasaki , Hiroyuki Yoshimura , Masaru Fukuman
发明人： Jun Ohya , Tatsumi Hamasaki , Hiroyuki Yoshimura , Masaru Fukuman
IPC分类号： B28D5/04
CPC分类号： B28D5/045 , B23D57/0069 , B24B27/0633
摘要： The present invention provides a method of cutting a workpiece efficiently with high accuracy by utilizing tension adjusters to approximate tension in a wire in a wire saw to a predetermined target tension while effectively reducing only tension in a winder-side wire. The method comprises a forward-driven cutting step of cutting a workpiece while moving a wire forward, a first switching step of reversing a driving direction of the wire, a backward-driven cutting step of cutting the workpiece while moving the wire backward, and a second switching step of reversing a driving direction of the wire and returning to the forward-driven cutting step, the steps being repeated in this order. In both switching steps, only tension in a winder-side wire is reduced by tension manipulators. A reduction in target wire tension therefor is performed after completion of deceleration of the wire in each switching step.
摘要翻译：本发明提供了一种通过利用张力调节器来有效地切割工件的方法，以使线锯中的线材的张力近似到预定的目标张力，同时有效地仅减小缠绕器线材中的张力。该方法包括：向前驱动切割步骤，在向前移动线的同时切割工件;反转线的驱动方向的第一切换步骤;向后移动切割工件的向后驱动切割步骤;以及第二切换步骤，其使线的驱动方向反转并返回到前进驱动的切割步骤，按顺序重复该步骤。在两个切换步骤中，仅通过张力操纵器减小卷绕机侧线中的张力。在每个切换步骤中线材的减速完成之后，执行目标线张力的降低。

10. 发明授权

US5914808A Intermediate isolator type fiber amplifier and fiber transmission system 失效
标题翻译：中间隔离器型光纤放大器和光纤传输系统
公开(公告)号：US5914808A
公开(公告)日：1999-06-22
申请号：US701987
申请日：1996-08-23
申请人： Masahiro Mitsuda , Jun Ohya , Tomoaki Uno
发明人： Masahiro Mitsuda , Jun Ohya , Tomoaki Uno
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/00
CPC分类号： H01S3/06758
摘要： The fiber amplifier of this invention includes: a first rare earth element doped fiber; a second rare earth element doped fiber; and a pump light source for generating pump light for exciting the first rare earth element doped fiber and the second rare earth element doped fiber, the fiber amplifier receiving analog signal light and amplifying the analog signal light, wherein the fiber amplifier further includes a directional transmitter disposed between the first rare earth element doped fiber and the second rare earth element doped fiber, and a transmittance of the directional transmitter for at least light having the same wavelength as the signal light propagating from the first rare earth element doped fiber to the second rare earth element doped fiber is larger than a transmittance of the directional transmitter for the light propagating from the second rare earth element doped fiber to the first rare earth element doped fiber.
摘要翻译：本发明的光纤放大器包括：第一稀土元素掺杂光纤; 第二稀土元素掺杂光纤; 以及泵浦光源，用于产生用于激发第一稀土元素掺杂光纤和第二稀土元素掺杂光纤的泵浦光，所述光纤放大器接收模拟信号光并放大模拟信号光，其中光纤放大器还包括定向发射器设置在第一稀土元素掺杂光纤和第二稀土元素掺杂光纤之间，并且定向发射器的透射率至少为与从第一稀土元素掺杂光纤传播到第二稀土元素掺杂光纤的信号光具有相同波长的光对于从第二稀土元素掺杂光纤向第一稀土元素掺杂光纤传播的光，定向发送器的透射率大于地球元素掺杂光纤。

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