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1. 发明授权

US5965874A Method and apparatus for measuring the polarization characteristics of optical transmission medium 失效
标题翻译：用于测量光传输介质极化特性的方法和装置
公开(公告)号：US5965874A
公开(公告)日：1999-10-12
申请号：US807870
申请日：1997-02-26
申请人： Osamu Aso , Isamu Ohshima , Haruki Ogoshi
发明人： Osamu Aso , Isamu Ohshima , Haruki Ogoshi
IPC分类号： G01J4/00 , G01J4/04 , G01M11/00 , G01N21/21 , G02F1/01
CPC分类号： G01J4/00 , G01J4/04 , G01M11/336 , G01M11/337 , G01N21/21
摘要： A method to obtain polarization characteristics of an optical transmission medium is disclosed. Sequentially plural different states of polarized light are launched into the optical transmission medium. Intensities of light emerging from the optical transmission medium through combinations of optical elements are measured to obtain Stokes parameters from which Stokes vectors describing the emerging light corresponding to each of the plural sequentially launched states of polarization are obtained; for at least three different launched states of polarization, descriptors are used of these launched states of polarization and the Stokes vectors describing the corresponding emerging light to calculate a Jones matrix which mathematically models the changes that the launched light when described in terms of a Jones vector is subject to when passing through the optical transmission medium; and, the Jones matrix is used to describe the polarization characteristics of the optical transmission medium.
摘要翻译：公开了一种获得光传输介质的偏振特性的方法。顺序地将多个不同的偏振光状态发射到光传输介质中。测量通过光学元件的组合从光传输介质出射的光的强度，以获得斯托克斯参数，从其中获得描述与多个顺序发射的极化状态中的每一个相对应的出射光的斯托克斯矢量; 对于至少三种不同的发射极化状态，使用这些发射的极化状态的描述符，并且描述相应的出射光的斯托克斯矢量来计算琼斯矩阵，该矩阵在以Jones矢量描述时对发射的光进行数学模拟经过光传输介质时经受; 并且，Jones矩阵用于描述光传输介质的偏振特性。

2. 发明授权

US5933552A Optical filter, manufacturing method thereof and optical amplifier equipped with said optical filter 失效
标题翻译：光滤波器及其制造方法和配备有所述滤光器的光放大器
公开(公告)号：US5933552A
公开(公告)日：1999-08-03
申请号：US997409
申请日：1997-12-23
申请人： Masaru Fukushima , Haruki Ogoshi , Hijiri Nimura
发明人： Masaru Fukushima , Haruki Ogoshi , Hijiri Nimura
IPC分类号： H01S3/10 , H04B10/17 , G02B6/28
CPC分类号： H04B10/2941 , H01S3/10023 , H01S2301/06
摘要： A method of manufacturing an optical filter that can restrain the wavelength dependence of the gain of an optical amplifier. The input signal light power, output power of pump light source (8), and the output signal light power of an optical amplifier (4) are set to the power values used for optical communication systems, and the total power of the simulation input light of a plurality of wavelengths (.lambda.1, .lambda.2, . . . .lambda.n) from light sources (1a) and an input light (probe light) from light sources (1m) are set equal to the total power of the input signals of a plurality of wavelengths used in wavelength division multiplex transmission systems. In this condition, the input light are multiplexed and are launched into optical amplifier (4), and the amount of attenuation from light source (1m) to the input end (14) of optical amplifier (4) is variably adjusted so that the output power from optical amplifier (4) in correspondence to the probe light will be within the range determined by the maximum and minimum of the output power corresponding to the simulation input light to determine the attenuation amount corresponding to the wavelength of the probe light. The above operation is repeated upon varying the wavelength of the probe light, and loss spectrum of the optical filter is set to the loss spectrum of the attenuation amounts in one-to-one correspondence with the respective wavelengths.
摘要翻译：一种制造可以抑制光放大器的增益的波长依赖性的滤光器的方法。输入信号光功率，泵浦光源的输出功率（8）和光放大器（4）的输出信号光功率被设置为用于光通信系统的功率值，并且模拟输入光的总功率来自光源（1a）的多个波长（λ1，λ2，...λn）和来自光源（1m）的输入光（探测光）被设置为等于输入信号的总功率在波分复用传输系统中使用的多个波长。在这种情况下，输入光被多路复用并发射到光放大器（4）中，并且可变地调节从光源（1m）到光放大器（4）的输入端（14）的衰减量，使得输出来自光放大器（4）的对应于探测光的功率将在由与模拟输入光相对应的输出功率的最大值和最小值确定的范围内，以确定与探测光的波长对应的衰减量。在改变探测光的波长时重复上述操作，并且将滤光器的损耗光谱设置为与各个波长一一对应的衰减量的损耗谱。

3. 发明授权

US06333803B1 Optical transmitter 有权
标题翻译：光发射机
公开(公告)号：US06333803B1
公开(公告)日：2001-12-25
申请号：US09202525
申请日：1999-01-25
申请人： Katsuya Kurotori , Haruki Ogoshi
发明人： Katsuya Kurotori , Haruki Ogoshi
IPC分类号： H04B1004
CPC分类号： H04B10/506 , H04B10/50 , H04B2210/258
摘要： An optical transmitter provided with a supercontinuum light source 4 which is composed of an optical amplifier 2 made by using a polarization maintaining amplification fiber 1 and a polarization maintaining fiber 3 which has a length of at least a specified value, is connected to the output side of the optical amplifier 2 and emits light having a continuous wave and a stable plane of polarization, a polarization maintaining optical demultiplexer 5 which takes out a light with a desired wavelength from the continuous wave light, and an external modulator 6 which superposes desired information upon the light with the desired wavelength.
摘要翻译：具有超连续光源4的光发送器连接到输出侧，该超连续光源4由使用偏振保持放大光纤1制成的光放大器2和长度至少为规定值的保偏光纤3组成并且发射具有连续波和稳定的偏振平面的光，从连续波光中取出具有期望波长的光的偏振保持光解复用器5和将期望信息叠加在一起的外部调制器6 具有所需波长的光。

4. 发明授权

US5202746A Method and apparatus for identifying an optical transmission medium 失效
标题翻译：用于识别光传输介质的方法和装置
公开(公告)号：US5202746A
公开(公告)日：1993-04-13
申请号：US487045
申请日：1990-03-02
申请人： Shintaro Sentsui , Akira Fujisaki , Haruki Ogoshi , Morinobu Mizutani , Mitsuo Miyazaki
发明人： Shintaro Sentsui , Akira Fujisaki , Haruki Ogoshi , Morinobu Mizutani , Mitsuo Miyazaki
IPC分类号： H04B10/25
CPC分类号： H04B10/25
摘要： A technique for identifying an optical transmission medium from a plurality of single-mode-type optical transmission media by using longitudinal middle portions of the media as an identification section by first exciting a particular optical transmission media by means of a polarized light, next applying either an electromagnetic action or a mechanical action to the particular optical transmission medium to modulate the polarized light and then identifying the particular optical transmission medium based on the deviation of the polarized plane of the polarized light.

5. 发明授权

US6028698A High-output and low-noise optical fiber amplifier 失效
标题翻译：高输出和低噪声光纤放大器
公开(公告)号：US6028698A
公开(公告)日：2000-02-22
申请号：US970540
申请日：1997-11-14
申请人： Haruki Ogoshi , Hiroki Tachibana
发明人： Haruki Ogoshi , Hiroki Tachibana
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/094 , H04J14/02 , H01S3/00
CPC分类号： H01S3/06758 , H01S2303/00 , H01S3/094096
摘要： An optical fiber amplifier can maintain its optical power output above a level exceeding +20 dBm and a low noise figure if the input optical signal shows a high power level. It comprises a front stage amplifying optical fiber 11 doped with a rare-earth element and arranged in a front stage 10A thereof and a back stage amplifying optical fiber 12 also doped with a rare-earth element and arranged in a back stage 10B thereof, wherein the front stage amplifying optical fiber 11 is provided at the signal light input terminal 13 thereof with a first optical coupler 14 for coupling signal light and excitation light in a same direction and at the signal light output terminal 15 thereof with a second optical coupler 16 for coupling signal light and excitation light in opposite directions and the back stage amplifying optical fiber 12 is provided at the signal light input terminal 19 thereof with a third optical coupler 21 for coupling signal light and excitation light in opposite directions, the first, second and third optical couplers 14, 16 and 21 being connected respectively to a first excitation light source 17 for generating excitation light with the 1,480 nm wavelength, a second excitation light source 18 for generating excitation light with the 980 nm wavelength and a third excitation light source 22 for generating excitation light with the 1,480 nm wavelength.
摘要翻译：如果输入光信号显示高功率电平，光纤放大器可以将其光功率输出保持在超过+ 20 dBm的水平和低噪声系数。它包括掺杂有稀土元素并且配置在其前级10A中的前级放大光纤11和还掺杂有稀土元素并设置在其后级10B中的后级放大光纤12，其中前级放大光纤11在其信号光输入端13处设置有用于将信号光和激发光在相同方向上和在其信号光输出端15处耦合的第一光耦合器14，第二光耦合器16用于耦合信号光和相反方向的激发光和后级放大光纤12在其信号光输入端19处设置有用于将信号光和激发光相反方向耦合的第三光耦合器21，第一，第二和第三光耦合器14,16和21分别连接到用于产生具有1,480nm的激发光的第一激发光源17 用于产生具有980nm波长的激发光的第二激发光源18和用于产生具有1,480nm波长的激发光的第三激发光源22。

6. 发明授权

US5883736A Er-doped optical fiber amplifier 失效
标题翻译：掺铒光纤放大器
公开(公告)号：US5883736A
公开(公告)日：1999-03-16
申请号：US803678
申请日：1997-02-21
申请人： Isamu Oshima , Akira Fujisaki , Haruki Ogoshi
发明人： Isamu Oshima , Akira Fujisaki , Haruki Ogoshi
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/108 , H01S3/16 , H01S3/30 , H01S3/00
CPC分类号： H04B10/2916 , H01S3/094003 , H01S2303/00 , H01S3/06754 , H01S3/1608 , H01S3/302
摘要： An Er-doped optical fiber amplifier is adapted to increase the length of transmission path by raising the intensity of pumped light. In an Er-doped optical fiber amplifier 1 for amplifying signal light by means of an Er-doped optical fiber 7, using a 1,530 nm band pumping source 8, 1,530 nm band pumped light is Raman-amplified by a 1,430 nm-1,450 nm band light source 9 on the transmission path of an optical fiber 5.
摘要翻译：掺铒光纤放大器适于通过提高泵浦光的强度来增加传输路径的长度。在用掺铒光纤7放大信号光的掺铒光纤放大器1中，使用1,530nm波段的泵浦源8，1530nm波段泵浦光由1,430nm-1,450nm波段拉曼放大在光纤5的传输路径上的光源9。

7. 发明授权

US06411430B1 Optical amplifier 有权
标题翻译：光放大器
公开(公告)号：US06411430B1
公开(公告)日：2002-06-25
申请号：US09587362
申请日：2000-06-02
申请人： Atsushi Ogino , Masaru Fukushima , Yoshihiro Emori , Haruki Ogoshi , Yoshio Tashiro
发明人： Atsushi Ogino , Masaru Fukushima , Yoshihiro Emori , Haruki Ogoshi , Yoshio Tashiro
IPC分类号： H01S300
CPC分类号： H04B10/2941 , H01S3/06758 , H01S3/10023 , H01S3/1301 , H01S2301/06
摘要： In an optical amplifier having a plurality of rare earth doped optical fibers in a multi-stage, there are provided one or more optical variable attenuator means, and an attenuation amount control means for changing an optical attenuation amount of the optical variable attenuator means on the basis of temperature of the rare earth doped optical fibers or an environmental temperature. In an optical amplifier having a plurality of rare earth doped optical fibers in a multi-stage, between the rare earth doped optical fibers, there are provided a replaceable optical part, one or more optical variable attenuator means, and an attenuation amount control means for changing an optical attenuation amount of the optical variable attenuator means on the basis of temperature of the rare earth doped optical fibers or an environmental temperature. In an optical amplifier having a plurality of rare earth doped optical fibers in a multi-stage, one or more externally controllable optical variable attenuator means are provided, and an optical attenuation amount of the optical variable attenuator means is varied with intensity of input optical signal to the optical amplifier and intensity of output optical signal from the optical amplifier.
摘要翻译：在具有多级的多个稀土掺杂光纤的光放大器中，设置有一个或多个光可变衰减器装置和衰减量控制装置，用于将光可变衰减器装置的光衰减量改变为稀土掺杂光纤的温度基准或环境温度。在具有多级稀土掺杂光纤的光放大器中，在稀土掺杂光纤之间，设置有可更换的光学部件，一个或多个光可变衰减器装置，以及一个衰减量控制装置，基于稀土掺杂光纤的温度或环境温度来改变光可变衰减器装置的光衰减量。在具有多级的多个稀土掺杂光纤的光放大器中，提供一个或多个外部可控光可变衰减器装置，并且光可变衰减器装置的光衰减量随着输入光信号的强度而变化到光放大器和来自光放大器的输出光信号的强度。

8. 发明授权

US06198570B1 Optical filter, manufacturing method thereof, and optical amplifier equipped with said optical filter 有权
标题翻译：光滤波器及其制造方法以及配备有所述滤光器的光放大器
公开(公告)号：US06198570B1
公开(公告)日：2001-03-06
申请号：US09259305
申请日：1999-03-01
申请人： Masaru Fukushima , Haruki Ogoshi , Hijiri Nimura
发明人： Masaru Fukushima , Haruki Ogoshi , Hijiri Nimura
IPC分类号： G02B628
CPC分类号： H04B10/2941 , H01S3/10023 , H01S2301/06
摘要： A method of manufacturing an optical filter that can restrain the wavelength dependence of the gain of an optical amplifier. The input signal light power, output power of pump light source (8), and the output signal light power of an optical amplifier (4) are set to the power values used for optical communication systems, and the total power of the simulation input light of a plurality of wavelengths (&lgr;1, &lgr;2, . . . &lgr;n) from light sources (1a) and an input light (probe light) from light sources (1m) are set equal to the total power of the input signals of a plurality of wavelengths used in wavelength division multiplex transmission systems. In this condition, the input light are multiplexed and are launched into optical amplifier (4), and the amount of attenuation is variably adjusted so that the output power from optical amplifier (4) in correspondence to the probe light will be within the range determined by the maximum and minimum of the output power corresponding to the simulation input light to determine the attenuation amount corresponding to the wavelength of the probe light. The above operation is repeated upon varying the wavelength of the probe light, and loss spectrum of the optical filter is set to the loss spectrum of the attenuation amounts in one-to-one correspondence with the respective wavelengths.
摘要翻译：一种制造可以抑制光放大器的增益的波长依赖性的滤光器的方法。输入信号光功率，泵浦光源的输出功率（8）和光放大器（4）的输出信号光功率被设置为用于光通信系统的功率值，并且模拟输入光的总功率来自光源（1a）的多个波长（lambd1，lambd2，... lambdn）和来自光源（1m）的输入光（探测光）被设置为等于多个用于波分复用传输系统的波长。在这种情况下，输入光被多路复用并被发射到光放大器（4）中，并且可变地调整衰减量，使得来自光放大器（4）的对应于探测光的输出功率将在确定的范围内通过对应于模拟输入光的输出功率的最大和最小来确定对应于探测光的波长的衰减量。在改变探测光的波长时重复上述操作，并且将滤光器的损耗光谱设置为与各个波长一一对应的衰减量的损耗谱。

9. 发明授权

US5808768A Optical telecommunications system 失效
标题翻译：光通信系统
公开(公告)号：US5808768A
公开(公告)日：1998-09-15
申请号：US570774
申请日：1995-12-12
申请人： Masateru Tadakuma , Masahito Morimoto , Hijiri Nimura , Haruki Ogoshi
发明人： Masateru Tadakuma , Masahito Morimoto , Hijiri Nimura , Haruki Ogoshi
IPC分类号： G01C19/66 , G02F1/01 , H01S3/06 , H01S3/067 , H01S3/07 , H01S3/083 , H01S3/10 , H01S3/17 , H04B10/516 , H04B10/548 , H04B10/588 , H04B10/61 , H04B10/00
CPC分类号： H04B10/532
摘要： There is provided an optical telecommunications method that can externally modulate a plane of polarization without producing any null point. According to the invention, in an optical telecommunications system for externally modulating the plane of polarization of the light being transmitted through an optical fiber for the transmission of a polarized wave signal by externally applying a signal to modify the state of polarization, the source of light for the transmission of a polarized wave signal is a fiber ring laser.
摘要翻译：提供了可以在不产生任何空点的情况下从外部调制偏振平面的光通信方法。根据本发明，在用于通过外部施加信号以改变偏振状态的外部调制通过光纤传输的光的偏振平面用于透射偏振波信号的光通信系统中，光源用于传输偏振波信号是光纤环形激光器。

10. 发明授权

US5379357A Method and apparatus for polarized optical telecommunications using ultrasonic modulation means 失效
标题翻译：使用超声波调制装置的偏振光通信方法和装置
公开(公告)号：US5379357A
公开(公告)日：1995-01-03
申请号：US41720
申请日：1993-04-01
申请人： Shintaro Sentsui , Akira Fujisaki , Haruki Ogoshi , Morinobu Mizutani , Mitsuo Miyazaki
发明人： Shintaro Sentsui , Akira Fujisaki , Haruki Ogoshi , Morinobu Mizutani , Mitsuo Miyazaki
IPC分类号： H04B10/25 , G02B6/10
CPC分类号： H04B10/25
摘要： An apparatus and method for optical telecommunication includes introducing a laser beam emitted from a light source at a first station into an optical fiber, providing an ultrasonic wave obtained by modulating a voice signal by a signal-applying-device at a work section to the optical fiber, modulating a polarized light passing through the optical fiber in amplitude and frequency, receiving the polarized light with the shifted wave plane at a light-receiving section in a second station, detecting at the light-receiving section in the second station the polarized light which has been modulated by the signal-applying device in the work section, and demodulating the polarized light to obtain a voice signal.
摘要翻译：一种用于光通信的装置和方法包括将从第一站处的光源发射的激光束引入到光纤中，提供通过在工作部分处的信号施加装置将声音信号调制到光学器件而获得的超声波光纤，以振幅和频率调制通过光纤的偏振光，在第二站的光接收部分接收偏移波平面的偏振光，在第二台的光接收部分检测偏振光其被工作部分中的信号施加装置调制，并且解调偏振光以获得语音信号。

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