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1. 发明授权

US06185020B2 Apparatus for detecting a fault location in an optical fiber line 失效
标题翻译：用于检测光纤线路中的故障位置的装置
公开(公告)号：US06185020B2
公开(公告)日：2001-02-06
申请号：US08905178
申请日：1997-08-04
申请人： Yukio Horiuchi , Shiro Ryu
发明人： Yukio Horiuchi , Shiro Ryu
IPC分类号： H04B1012
CPC分类号： G01M11/39 , G01M11/3136 , H04B10/07 , H04B10/071
摘要： Disposing optical fiber gratings 10a each reflecting a wavelength &lgr;1 which is different from a signal wavelength &lgr;s along an optical fiber line 10 at suitable intervals and positions. The wavelength &lgr;s of signal light is not reflected by the grating 10a, but transmitted through the optical fiber line 10. An optical pulse tester 14 outputs probe pulse lights of wavelengths &lgr;0, &lgr;1, which are different from the signal wavelength &lgr;s, at slightly different times. The probe lights of the wavelengths &lgr;0, &lgr;1 are input into the optical fiber line 10 through an optical adding and dividing device 16 and transmitted through the optical fiber line 10. Reflected light of the wavelength &lgr;1 of probe light contains therein reflection pulses of the grating 10a, and each reflection pulse serves as a position reference. The probe light of the wavelength &lgr;0 does not contain reflection light of the grating 10a. Comparison of the reflected lights of the wavelengths &lgr;0, &lgr;1 to each other by the optical pulse tester 14, provides determination of whether there is a fault location, and, if so, detection of fault location with high precision can be made.
摘要翻译：将光纤光栅10a反射出不同于信号波长的波长lambd1，以适当的间隔和位置沿着光纤线路10放置。信号光的波长兰德不被光栅10a反射，而是通过光纤线路10传输。光脉冲测试器14输出与信号波长羔羊不同的波长lambd0，lambd1的探测脉冲光，稍微不同次波长lambd0，lambd1的探测光通过光学加法分割装置16输入到光纤线路10中，并通过光纤线路10传输。探测光的波长lambd1的反射光包含光栅的反射脉冲 10a，并且每个反射脉冲用作位置参考。波长lambd0的探测光不包含光栅10a的反射光。通过光脉冲测试仪14将波长lambd0，lambd1的反射光进行比较，提供是否存在故障定位，如果是，可以高精度地检测故障位置。

2. 发明授权

US5140452A Long-distance high-speed optical communication scheme 失效
标题翻译：长距离高速光通信方案
公开(公告)号：US5140452A
公开(公告)日：1992-08-18
申请号：US636863
申请日：1991-01-02
申请人： Shu Yamamoto , Hidenori Taga , Noboru Edagawa , Yoshihiro Yoshida , Shiro Ryu , Hiroharu Wakabayashi
发明人： Shu Yamamoto , Hidenori Taga , Noboru Edagawa , Yoshihiro Yoshida , Shiro Ryu , Hiroharu Wakabayashi
IPC分类号： G02B6/00 , G02F2/00 , H04B10/00 , H04B10/2525 , H04B10/508 , H04B10/524 , H04B10/54 , H04B10/588
CPC分类号： H04B10/505
摘要： In a long-distance high-speed optical communication scheme in which multiple optical amplifiers are provided at a large number of stages in optical fibers, an optical signal from a light source which has a desired small line width and oscillates at a single wavelength is modulated at a high speed by an external modulator and then transmitted in the fibers which are dispersion shifted optical fibers, the zero-dispersion wavelength in which is set to be larger than the oscillation wavelength of the light source. Therefore, noises and the modulation instability, which would occur due to the phase fluctuation in the oscillation wavelength of the light source, and the influence of a waveform distortion due to the dispersion in the optical fibers can be avoided to make it possible for the first time in history to transmit the optical signals at the high-speed in the long-distance optical communication system employing the optical amplifiers.
摘要翻译：在光纤中以多个阶段提供多个光放大器的长距离高速光通信方式中，来自具有期望的小线宽并且以单个波长振荡的光源的光信号被调制通过外部调制器以高速度传输，然后在作为色散位移光纤的光纤中传输，其中零色散波长被设置为大于光源的振荡波长。因此，可以避免由于光源的振荡波长的相位波动而产生的噪声和调制不稳定性，以及由于光纤中的色散引起的波形失真的影响，使得第一在使用光放大器的长距离光通信系统中以高速传输光信号的历史时间。

3. 发明授权

US5912756A Light receiving device 失效
标题翻译：光接收装置
公开(公告)号：US5912756A
公开(公告)日：1999-06-15
申请号：US742680
申请日：1996-10-31
申请人： Shiro Ryu
发明人： Shiro Ryu
IPC分类号： H01S3/07 , H01S3/06 , H01S3/067 , H04B10/07 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/508 , H04B10/516 , H04B10/548 , H04B10/58 , H04B10/60 , H04B10/61 , H04B10/66 , H04J14/00 , H04J14/02 , H04B10/02
CPC分类号： H04B10/675
摘要： To enable the filtering of a light signal without using an optical bandpass filter, the present invention provides the following construction: a light signal transmitted through an optical fiber enters an injection-locked laser device which is locked to the wavelength of the light signal to oscillate synchronously with the light signal; the locked light signal enters a light frequency discriminator to transform the frequency-modulated signal into an intensity modulated signal, and it enters a light receiver to be demodulated. Since the injection-locked laser device emits only a locked oscillation light signal, the received light signal can be extracted without using an optical bandpass filter.
摘要翻译：为了能够在不使用光学带通滤波器的情况下对光信号进行滤波，本发明提供以下结构：通过光纤传输的光信号进入锁定在光信号波长上的注入锁定激光器件与光信号同步; 锁定的光信号进入光频鉴别器，将频率调制信号变换成强度调制信号，并进入光接收器进行解调。由于注入锁定的激光装置仅发出锁定的振荡光信号，所以可以在不使用光学带通滤波器的情况下提取接收的光信号。

4. 发明授权

US5793512A Optical communication system 失效
标题翻译：光通信系统
公开(公告)号：US5793512A
公开(公告)日：1998-08-11
申请号：US592862
申请日：1996-01-24
申请人： Shiro Ryu
发明人： Shiro Ryu
IPC分类号： H04B10/2507 , H04B10/255 , H04B10/2557 , H04B10/2563 , H04B10/508 , H04B10/548 , H04B10/58 , H04B10/02
CPC分类号： H04B10/2935
摘要： An optical communication system in which the degradation of the signal-to-noise-ratio during transmission is alleviated. An optical signal from an optical transmitter is propagated over a transmission line comprising optical fibers and optical amplifiers, and received by an optical receiver. The signal-to-noise ratio is improved by inserting an injection-locked laser device at a specified point on the optical transmission line, improving the transmission characteristics of the optical communication system.
摘要翻译：其中减轻了传输期间信噪比的恶化的光通信系统。来自光发射机的光信号在包括光纤和光放大器的传输线上传播并由光接收机接收。通过在光传输线上的指定点插入注入锁定的激光装置来提高信噪比，提高光通信系统的传输特性。

5. 发明授权

US5463461A Coherent optical receiver having optically amplified local oscillator signal 失效
标题翻译：具有光放大本地振荡器信号的相干光接收机
公开(公告)号：US5463461A
公开(公告)日：1995-10-31
申请号：US369992
申请日：1995-01-09
申请人： Yukio Horiuchi , Shiro Ryu
发明人： Yukio Horiuchi , Shiro Ryu
IPC分类号： G02F1/35 , G02F2/00 , H04B10/2507 , H04B10/516 , H04B10/548 , H04B10/61 , G01B9/02
CPC分类号： H04B10/60 , H04B10/64
摘要： The coherent optical receiver is characterized in that it comprises a local oscillator light, source, for amplifying a local oscillator light a light combining/dividing unit, a dual balanced receiver which comprises two optical detectors, and an electrical amplifier. Therefore, the coherent optical receiver has the characteristic that the length of the non-repeating section of an optical communication system including the device and employing heterodyne detection can be increased, or the dynamic range of an optical measuring system including this receiver and employing heterodyne detection can be widened.
摘要翻译：相干光接收器的特征在于它包括用于放大本地振荡器光的本地振荡器光源，光合成/分离单元，包括两个光学检测器的双平衡接收器和电放大器。因此，相干光接收机具有能够增加包括该装置并且使用外差检测的光通信系统的非重复部分的长度，或包括该接收机的光学测量系统的动态范围，并采用外差检测可以加宽

6. 发明授权

US06493074B1 Method and apparatus for measuring an optical transfer characteristic 失效
标题翻译：用于测量光学传递特性的方法和设备
公开(公告)号：US06493074B1
公开(公告)日：2002-12-10
申请号：US09479454
申请日：2000-01-06
申请人： Motoki Imamura , Shiro Ryu
发明人： Motoki Imamura , Shiro Ryu
IPC分类号： G01B900
CPC分类号： G01M11/332 , G01M11/335
摘要： There are provided an optical transfer characteristic measuring method and apparatus capable of measuring an optical transfer characteristic of an optical device on optical frequency axis in wide optical frequency bandwidth with high resolution. There are provided a variable wavelength sweep type light source capable of switching the wavelength of an optical signal generated therefrom stepwise and sweeping the optical frequency of the optical signal in a predetermined frequency range, and a variable wavelength reference light source capable of switching the wavelength of an optical signal generated therefrom stepwise and not capable of sweeping the optical frequency of the optical signal. Optical signals having their wavelengths sequentially switched to corresponding specified wavelengths are generated from the variable wavelength sweep type light source, and also a sweep of the optical frequency of each optical signal having the corresponding specified wavelength is carried out over the predetermined frequency range, until the number of occurrences of the optical signals reaches a preset number of times. After the measurement of the optical transfer characteristic has been completed, the measured results of the optical transfer characteristic regarding all of the specified wavelengths are concatenated on optical frequency axis, and is analyzed/displayed.
摘要翻译：提供了一种能够以高分辨率的宽光频带宽中的光频率轴上的光学装置的光传送特性来测量的光传输特性测量方法和装置。提供了一种可变波长扫描型光源，其能够逐步切换由其产生的光信号的波长，并且扫描预定频率范围内的光信号的光频率;以及可变波长参考光源，其能够切换逐步产生的光信号，不能扫描光信号的光频。从可变波长扫描型光源产生其波长顺序切换到对应的特定波长的光信号，并且在预定频率范围内执行具有相应指定波长的每个光信号的光频率扫描，直到光信号的发生次数达到预先设定的次数。在光传输特性的测量完成之后，关于所有指定波长的光传输特性的测量结果被连接在光频轴上，并进行分析/显示。

7. 发明授权

US5317382A Optical phase detection method with orthogonal polarization and phase compensation arrangement 失效
标题翻译：具有正交极化和相位补偿布置的光相位检测方法
公开(公告)号：US5317382A
公开(公告)日：1994-05-31
申请号：US797742
申请日：1991-11-25
申请人： Tetsuya Miyazaki , Shiro Ryu
发明人： Tetsuya Miyazaki , Shiro Ryu
IPC分类号： G02F2/00 , G01J9/04 , G02B27/28 , H01L31/16 , H04B10/516 , H04B10/548 , H04B10/61 , H04L27/22 , H04L27/227 , G01B9/02
CPC分类号： H04B10/60 , G01J9/04 , G02B27/283 , H04B10/613 , H04B10/614 , H04B10/63
摘要： A method of optical phase detection, in which a signal light polarized linearly and a local light emitted from a local light laser light source are combined with each other so that an in-phase component and a quadrature component, which is 90 degrees behind the local light in phase and is combined with the signal light, are taken out; and the in-phase component is demodulated while the phase of the signal light and that of the local light are synchronized with each other through the use of the in-phase component and the quadrature component, in which the signal light and the local light are separated into mutually-perpendicular P-polarized and S-polarized components by first and second polarization beam splitters; the phases of the P-polarized or S-polarized components are regulated by first and second optical phase compensation plates so that the polarized components of the signal light are kept in phase with each other, but the polarized components of the local light have a phase difference of 90 degrees between themselves; and the polarized components of the signal light and those of the local light are combined with each other by a first and a second combiner so that the in-phase component and the quadrature component are obtained. Therefore, a method having a low demodulation error can be easily provided to be widely used for high-capacity coherent optical communication.
摘要翻译：一种光学相位检测方法，其中线性偏振的信号光和从局部光激光光源发射的局部光彼此组合，使得在本地的90度之后的同相分量和正交分量同相并与信号灯结合，取出; 并且通过使用同相分量和正交分量使信号光和局部光的相位彼此同步的同相分量被解调，其中信号光和局部光是通过第一和第二偏振分束器分离为相互垂直的P偏振和S偏振分量; P偏振或S偏振分量的相位由第一和第二光学相位补偿板调节，使得信号光的偏振分量保持彼此相位，但局部光的偏振分量具有相位它们之间的差值为90度; 并且通过第一和第二组合器将信号光和局部光的偏振分量相互组合，从而获得同相分量和正交分量。因此，可以容易地提供具有低解调误差的方法以广泛用于大容量相干光通信。

8. 发明授权

US4984884A Method for measuring dispersion characteristics of an optical fiber 失效
标题翻译：测量光纤色散特性的方法
公开(公告)号：US4984884A
公开(公告)日：1991-01-15
申请号：US347614
申请日：1989-05-04
申请人： Shiro Ryu , Kiyohumi Mochizuki , Yukio Horiuchi
发明人： Shiro Ryu , Kiyohumi Mochizuki , Yukio Horiuchi
IPC分类号： G01M11/02 , G01M11/00 , G02B6/00
CPC分类号： G01M11/335 , G01M11/333 , G01M11/338
摘要： In measurement method of dispersion characteristics of an optical fiber, a laser for measurement connected to one end of the fiber and variable in output light wavelength and an oscillation for modulating a measurement light signal sent out from the laser are provided. The modulation frequency of the output from the oscillator is used as an reference electric signal. A measuring light signal obtained through the modulator 8 and transmitted through the fiber is converted into an measuring electric signal. And the characteristics is measured from the phase difference between the reference electric signal and the measuring electric signal, wherein an external modulator, an optical divider and a monitoring section are provided. The modulator modulates the measuring light signal sent out from the laser and having a narrow spectral linewidth. The divider divides the output light signal from the modulator, at a prescribed ratio. The measuring light signal obtained through the modulator is multiplexed with output light signal from a laser for monitoring by the section to generate a beat to measure the oscillation wavelength of the laser for measurement through optical heterodyne detection. And the characteristics is measured while the result of the measurement of the oscillation wavelength is compared with that of the measurement of the phase difference.

9. 发明授权

US06201599B1 Optical transmission line monitoring apparatus 失效
标题翻译：光传输线路监控装置
公开(公告)号：US06201599B1
公开(公告)日：2001-03-13
申请号：US09109483
申请日：1998-07-02
申请人： Shiro Ryu , Yukio Horiuchi
发明人： Shiro Ryu , Yukio Horiuchi
IPC分类号： G01N2100
CPC分类号： H04B10/071 , H04B10/272
摘要： An apparatus for monitoring and measuring condition of a plurality of optical transmission lines individually according to this invention comprises at least one reflecting means having a predetermined reflection bandwidth arranged on each of said optical transmission lines; an optical pulse tester for outputting probe pulse light having predetermined wavelength in the reflection bandwidth of said reflecting means, and analyzing the reflected light of said probe pulse light in a time domain; optical coupling means for adding said probe pulse light from said optical pulse tester and a signal light, and coupling it to each of optical transmission lines through optical dividing means, along with coupling the reflected light of said probe pulse light to said optical pulse tester; and a plurality of optical filters arranged on the input end of each of said optical transmission lines for transmitting wavelength of signal light to be transmitted on their respective optical transmission lines and the predetermined wavelengths to be reflected on the reflection means on corresponding optical transmission lines. The predetermined wavelengths of a plurality of optical filters are different from each other.
摘要翻译：根据本发明的用于监视和测量多个光传输线的状态的装置包括至少一个具有布置在每个所述光传输线上的预定反射带宽的反射装置; 一个光脉冲测试器，用于输出具有预定波长的探测脉冲光在所述反射装置的反射带宽中，并在时域中分析所述探针脉冲光的反射光; 光耦合装置，用于将来自所述光脉冲测试仪的所述探针脉冲光和信号光相加，并通过光分离装置将其耦合到每个光传输线，以及将所述探针脉冲光的反射光耦合到所述光脉冲测试仪; 以及多个光滤波器，布置在每个所述光传输线的输入端上，用于传输要在其各自的光传输线上传输的信号光的波长和预定波长，以在相应的光传输线上反射在反射装置上。多个滤光器的预定波长彼此不同。

10. 发明授权

US5940197A Optical add-drop device 失效
标题翻译：光分插器
公开(公告)号：US5940197A
公开(公告)日：1999-08-17
申请号：US825061
申请日：1997-03-27
申请人： Shiro Ryu
发明人： Shiro Ryu
IPC分类号： H04J14/00 , H04B10/07 , H04B10/2507 , H04B10/27 , H04B10/29 , H04B10/296 , H04B10/54 , H04B10/548 , H04B10/572 , H04J14/02 , H04B10/00
CPC分类号： H04J14/0201 , H04J14/0212
摘要： The self-oscillation frequencies of injection-locked laser devices 5-1 through 5-M are preset to the frequency of the signal light to be transmitted by the optical add-drop device, and the self-oscillation frequencies of the injection-locked laser devices 6-1 through 6-N are preset to the frequency of the signal light to be branched by this device. Wavelength-division multiplexed signal light inputted from an input optical line 1 is split in an optical splitter 2 and inputted to the injection-locked laser devices. Signal light whose wavelength has been set for the injection-locked laser devices 5-1 through 5-M is amplified by these injection-locked laser devices 5-1 through 5-M and inputted to an optical combiner 10. Signal light whose wavelength has been set for the injection-locked laser devices 6-1 through 6-N is outputted to branching optical lines 8-1 through 8-N. Signal light outputted from inserting optical lines 9-1 through 9-L is inputted to the optical combiner 10 together with the signal light from the injection-locked laser devices 5-1 through 5-M and is outputted to an output optical line 11. It is thus possible to provide an optical add-drop device in which the wavelength and number of split or inserted signal light can be set as needed.
摘要翻译：注入锁定激光器件5-1至5-M的自振频率预设为由光学分插装置传输的信号光的频率，并且注入锁定激光器的自振频率设备6-1至6-N被预设为由该设备分支的信号光的频率。从输入光线路1输入的波分复用信号光在光分路器2中被分割并输入到注入锁定的激光装置。通过这些注入锁定的激光装置5-1〜5-M对由注入锁定的激光装置5-1〜5-M设定的波长的信号光进行放大，输入到光学组合器10.波长为被设定为注入锁定的激光装置6-1至6-N被输出到分支光线8-1至8-N。从插入光线9-1至9-L输出的信号光与来自注入锁定激光装置5-1至5-M的信号光一起输入到光组合器10，并被输出到输出光线路11。因此，可以提供一种光分插装置，其中可以根据需要设置分离或插入的信号光的波长和数量。

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