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1. 发明授权

US5589969A Wavelength division multiplexed optical fiber transmission equipment 失效
标题翻译：波分复用光纤传输设备
公开(公告)号：US5589969A
公开(公告)日：1996-12-31
申请号：US542058
申请日：1995-10-12
申请人： Hidenori Taga , Noboru Edagawa , Noriyuki Takeda , Shu Yamamoto , Shigeyuki Akiba
发明人： Hidenori Taga , Noboru Edagawa , Noriyuki Takeda , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H04J14/00 , H04B10/2507 , H04B10/2563 , H04J14/02
CPC分类号： H04B10/2572 , H04J14/0224
摘要： The present invention provides a wavelength division multiplexed optical fiber transmission equipment which can increase the number of channels of the WDM signal by reducing a required bandwidth of optical signals while suppressing an interference between signals caused by four-wave mixing. A WDM optical transmitting terminal comprises five or more optical transmitters and the wavelengths of optical signals from the optical transmitters are set such that the spacing between the wavelengths of two signals is re-used as the spacing between the wavelengths of other two signals separated by the above signals by two or more waves and there is no periodicity in the channel spacing s. For instance, the wavelengths of the optical signals are set as shown in FIG. 1. As the result, deterioration in the transmission characteristics of the optical signals can be effectively reduced and, at the same time, the maximum number of channels of the WDM signal can be increased. To the WDM optical transmitting terminal is added polarization state controllers for controlling the state of polarization such that the states of polarizations of adjacent signals cross each other at an output of the WDM optical transmitting terminal.
摘要翻译：本发明提供一种波分复用光纤传输设备，其可以通过减少光信号的所需带宽，同时抑制由四波混频引起的信号之间的干扰，从而增加WDM信号的信道数。 WDM光发射终端包括五个或更多个光发射机，并且来自光发射机的光信号的波长被设置为使得两个信号的波长之间的间隔被重新使用为由其间隔开的其它两个信号的波长之间的间隔上述信号由两个或更多个波，并且在信道间隔s中没有周期性。例如，光信号的波长如图5所示设定。结果，可以有效地降低光信号的传输特性的劣化，并且同时可以增加WDM信号的最大信道数。对于WDM光发射终端，增加了用于控制极化状态的偏振状态控制器，使得相邻信号的偏振状态在WDM光发送终端的输出端彼此交叉。

2. 发明授权

US5559910A Wavelength division multiplexed optical fiber transmission equiptment 失效
标题翻译：波分复用光纤传输
公开(公告)号：US5559910A
公开(公告)日：1996-09-24
申请号：US452028
申请日：1995-05-26
申请人： Hidenori Taga , Noboru Edagawa , Shu Yamamoto , Noriyuki Takeda , Shigeyuki Akiba
发明人： Hidenori Taga , Noboru Edagawa , Shu Yamamoto , Noriyuki Takeda , Shigeyuki Akiba
IPC分类号： G02F1/35 , H04B10/2507 , H04B10/2525 , H04B10/2563 , G02B6/28
CPC分类号： H04B10/25253 , H04B10/2563
摘要： It is the object of the present invention to optimize the degradation due to the four-wave mixing of wavelength multiplexed signals and the distortion due to the chromatic dispersion, thereby to provide a wavelength division multiplexed optical fiber transmission equipment having good transmission characteristics. A WDM transmitting terminal consists of four transmitters of channels 1 to 4, and a wavelength-division multiplexer. Further, a WDM receiving terminal consists of an equalization optical fiber, a wavelength-division demultiplexer, and four receivers of the channels 1 to 4. The WDM transmitting terminal and the WDM receiving terminal are interconnected by transmission optical fibers and an optical amplifier. The equipment is designed so that the wavelengths .lambda..sub.1, .lambda..sub.2, .lambda..sub.3 and .lambda..sub.4 of the optical signals output from the transmitters all lie on the short-wavelength side with respect to the average zero-dispersion wavelength .lambda..sub.0. This allows the distortion due to the four-wave mixing of a wavelength multiplexed signal to be reduced. The equalization optical fiber has a chromatic dispersion of a sign opposite to the chromatic dispersion of the optical fibers forming a transmitting path, thereby for compensating the chromatic dispersion of the optical signals output from the transmitters.
摘要翻译：本发明的目的是优化由于波分复用信号的四波混频和由于色散导致的失真的劣化，从而提供具有良好传输特性的波分复用光纤传输设备。 WDM发射终端由通道1至4的四个发射器和波分复用器组成。此外，WDM接收终端由均衡光纤，波分多路分解器，以及通道1〜4的4个接收器构成.WDM发送终端和WDM接收终端由发送光纤和光放大器互连。设备的设计使得从发射机输出的光信号的波长λ1，λ2，λ3和λ4相对于平均零色散波长λ0位于短波长侧。这允许由于要减少的波长复用信号的四波混频引起的失真。均衡光纤具有与形成发送路径的光纤的色散相反的符号的色散，从而补偿从发送器输出的光信号的色散。

3. 发明授权

US6091538A Gain equalizing apparatus 失效
标题翻译：增益均衡装置
公开(公告)号：US6091538A
公开(公告)日：2000-07-18
申请号：US987433
申请日：1997-12-09
申请人： Noriyuki Takeda , Shigeyuki Akiba , Noboru Edagawa , Hidenori Taga
发明人： Noriyuki Takeda , Shigeyuki Akiba , Noboru Edagawa , Hidenori Taga
IPC分类号： H01S3/10 , H04B10/2507 , H04B10/29 , H04B10/291 , H04J14/00 , H04J14/02 , H01S3/00
CPC分类号： H04B10/294 , H04J14/0221 , H04B2210/258
摘要： An equalizing apparatus for equalizing gains of wideband wavelength-division multiplexed light and for improving the S/N ratio comprises a plurality of optical amplifyer for optically amplifying light in different wavelength groups, respectively; and multiplexer for multiplexing optically amplified light from said plurality of optically amplifying means.
摘要翻译：用于均衡宽带波分复用光的增益并用于提高S / N比的均衡装置包括分别用于光学放大不同波长组中的光的多个光放大器; 以及用于对来自所述多个光学放大装置的光放大的光进行复用的多路复用器。

4. 发明授权

US5892608A Optical receiver device for dark soliton lightwave 失效
标题翻译：用于暗孤子光波的光接收器
公开(公告)号：US5892608A
公开(公告)日：1999-04-06
申请号：US770455
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 , H04B10/06
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。

5. 发明授权

US5629795A Optical amplifying-repeating transmission system 失效
标题翻译：光放大重复传输系统
公开(公告)号：US5629795A
公开(公告)日：1997-05-13
申请号：US521973
申请日：1995-08-31
申请人： Masatoshi Suzuki , Itsuro Morita , Shu Yamamoto , Noboru Edagawa , Hidenori Taga , Shigeyuki Akiba
发明人： Masatoshi Suzuki , Itsuro Morita , Shu Yamamoto , Noboru Edagawa , Hidenori Taga , Shigeyuki Akiba
IPC分类号： H04B10/2507 , H04B10/2525 , H04B10/29 , H04B10/291 , H01S3/00 , H04B10/02
CPC分类号： H04B10/25253
摘要： An optical amplifying-repeating transmission system is disclosed which is composed of an optical fiber for transmitting a lightwave signal with digital information added to return-to-zero lightwave pulses and a plurality of optical amplifying repeaters inserted in the optical fiber for transmission use. The mean value of wavelengths at which the wavelength dispersion of the optical fiber is zero is smaller than the wavelength of the lightwave signal which is transmitted over the system. The accumulated wavelength dispersion value of the optical fiber tends to increase with the distance of transmission, from a macroscopic viewpoint. The optical fiber for transmission is divided into a plurality of sections. In accordance with the accumulated wavelength dispersion value of the optical fiber in each section except at least the last one, a wavelength dispersion medium, which locally changes the wavelength dispersion in a manner to cancel the accumulated wavelength dispersion in the section at the wavelength of the lightwave signal, is inserted in the section to eliminate the accumulation of the timing jitter.
摘要翻译：公开了一种光放大重复传输系统，其由用于传输光波信号的光纤与添加到归零光波脉冲的数字信息以及插入光纤中的多个光放大中继器组成，用于传输使用。光纤的波长色散为零的波长的平均值小于在系统上传输的光波信号的波长。从宏观的观点来看，光纤的累积波长色散值随着透射距离而增加。用于传输的光纤被分成多个部分。根据除了至少最后一个部分之外的每个部分中的光纤的累积波长色散值，波长色散介质以局部改变波长色散的方式来消除在波长的波长处的部分中的累积波长色散光波信号，插入该部分以消除定时抖动的累积。

6. 发明授权

US5737110A Optical communication system using dark soliton lightwave 失效
标题翻译：光通信系统采用黑暗孤子光波
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。

7. 发明授权

US5642215A Optical transmission system 失效
标题翻译：光传输系统
公开(公告)号：US5642215A
公开(公告)日：1997-06-24
申请号：US521952
申请日：1995-08-31
申请人： Masatoshi Suzuki , Itsuro Morita , Noboru Edagawa , Hidenori Taga , Shu Yamamoto , Shigeyuki Akiba
发明人： Masatoshi Suzuki , Itsuro Morita , Noboru Edagawa , Hidenori Taga , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： G02F1/35 , H01S3/10 , H04B10/2507 , H04B10/508 , H04B10/524 , H04B10/58 , H04B10/00
CPC分类号： H04B10/25077
摘要： An optical transmission system which permits long-distance, ultrafast, high-capacity optical soliton transmission by suppressing timing jitter with simple means. In an optical transmission system which uses a transmission line composed of an optical fiber for transmitting therethrough a lightwave signal having digital information added to a return-to-zero lightwave pulse and a plurality of optical amplifying repeaters for compensating for losses by the optical fiber and in which the pulse compression effect by the nonlinear optical effect on the optical pulse and the pulse expansion effect by the dispersion effect are compensated, at least one optical band limited element which has a flat group delay characteristic near the center frequency is disposed in the transmission line at intervals of a period Z equal to the soliton period Z.sub.sol and the product, aB.sub.sol.spsb.2, of the curvature a of the product of the intensity transfer funtions of the optical band limited elements in the vicinity of the center frequency in the soliton period and the square of the full width at half maximum, B.sub.sol, of the spectrum of the lightwave pulse to be transmitted is set to a value in the range of 2.1.times.10.sup.-2 to 8.3.times.10.sup.-2.
摘要翻译：一种光传输系统，通过简单的手段抑制定时抖动，允许长距离，超快速，高容量的光孤子传输。在光传输系统中，使用由光纤组成的传输线通过其传输具有添加到归零光波脉冲的数字信息的光波信号和用于补偿光纤损耗的多个光放大中继器，以及其中通过非线性光学效应对光脉冲的脉冲压缩效应和由色散效应产生的脉冲扩展效应被补偿，至少一个在中心频率附近具有平坦组延迟特性的光学带限制元件设置在透射以等于孤子周期Zsol的周期Z的间隔和在孤子周期中的中心频率附近的光学带限制元件的强度转移功率的乘积的曲率a的乘积aBsol2，以及要发送的光波脉冲的频谱的半峰全宽Bsol被设定为t o在2.1×10-2至8.3×10-2的范围内的值。

8. 发明授权

US5574590A Optical amplifying transmitting system 失效
标题翻译：光放大传输系统
公开(公告)号：US5574590A
公开(公告)日：1996-11-12
申请号：US521838
申请日：1995-08-31
申请人： Noboru Edagawa , Masatoshi Suzuki , Hidenori Taga , Itsuro Morita , Shu Yamamoto , Shigeyuki Akiba
发明人： Noboru Edagawa , Masatoshi Suzuki , Hidenori Taga , Itsuro Morita , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： G02F1/35 , H04B10/2507 , H04B10/2513 , H04B10/29 , H04B10/291 , H04B10/508 , H04B10/524 , H04B10/58 , H04B10/16 , H04B10/12
CPC分类号： H04B10/2935 , H04B10/25253
摘要： An optical amplifying transmission system is disclosed in which a large quantity of optical fiber whose zero dispersion wavelength is longer than the wavelength of the lightwave signal is introduced to provide an RZ lightwave signal transmission system. In this system, the average zero dispersion wavelength by the optical fiber is shorter than the wavelength of the lightwave signal, the zero dispersion wavelength by the optical fiber whose length is in the range of one-thirds to two-thirds of the entire length of the optical fiber is longer than the wavelength of the lightwave signal, and the absolute value of the wavelength dispersion is larger than one-half the absolute value of the average wavelength dispersion value over the entire length of the optical fiber.
摘要翻译：公开了一种光放大传输系统，其中引入了零色散波长比光波信号的波长长的大量光纤，以提供RZ光波信号传输系统。在该系统中，光纤的平均零色散波长比光波信号的波长短，其长度为全长的三分之一到三分之二的光纤的零色散波长光纤比光波信号的波长长，波长色散的绝对值大于光纤的整个长度上的平均波长色散值的绝对值的一半。

9. 发明授权

US5872647A Optical transmitting terminal 失效
标题翻译：光发射终端
公开(公告)号：US5872647A
公开(公告)日：1999-02-16
申请号：US760411
申请日：1996-12-04
申请人： Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Shigeyuki Akiba
发明人： Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Shigeyuki Akiba
IPC分类号： G02F1/01 , H04B10/2569 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/524 , H04B10/556 , H04B10/60 , H04B10/61 , H04B10/04
CPC分类号： H04B10/532
摘要： The object of the present invention is to provide an optical transmitter which enables the reduction of the strong dependency of the transmission characteristic on the high-speed polarization scrambler driving signal phase. The light outputted from a light source is converted to a RZ pulse by an electro-absorption modulator. The RZ pulse is modulated by a data modulator, and the polarization thereof is scrambled in a high-speed electro-optic polarization scrambler and outputted from the output terminal thereof. Since, in the present invention, the light is once changed to a RZ pulse, the strong dependency of the optical signal transmission characteristic on the high-speed polarization scrambler driving signal phase can be reduced. Further, if the phase of the RZ pulse in the NRZ modulation signal is made to synchronize with the rising edge or the falling edge of the NRZ signal, the dependency on the high-speed polarization scrambler driving signal phase can be further reduced.
摘要翻译：本发明的目的是提供一种能够降低传输特性对高速偏振加扰器驱动信号相位的强依赖性的光发射机。从光源输出的光通过电吸收式调制器转换为RZ脉冲。 RZ脉冲由数据调制器调制，其极化在高速电光偏振扰乱器中被加扰并从其输出端输出。由于在本发明中，光一度变为RZ脉冲，所以可以降低光信号传输特性对高速偏振加扰器驱动信号相位的强烈依赖性。此外，如果使NRZ调制信号中的RZ脉冲的相位与NRZ信号的上升沿或下降沿同步，则可以进一步降低对高速偏振加扰器驱动信号相位的依赖性。

10. 发明授权

US5808789A Optically amplifying transmission system 失效
标题翻译：光放大传输系统
公开(公告)号：US5808789A
公开(公告)日：1998-09-15
申请号：US873568
申请日：1997-06-12
申请人： Noboru Edagawa , Hidenori Taga , Masatoshi Suzuki , Itsuro Morita , Shu Yamamoto , Shigeyuki Akiba
发明人： Noboru Edagawa , Hidenori Taga , Masatoshi Suzuki , Itsuro Morita , Shu Yamamoto , Shigeyuki Akiba
IPC分类号： H01S3/10 , H01S3/06 , H04B3/04 , H04B10/2513 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02 , G02B6/26 , H04B3/14
CPC分类号： H04B10/2935 , H04B10/2912
摘要： An optically amplifying transmission system available for wider signal bands includes an optical transmission line 42 divided into two sections 42a and 42b, optically amplifying repeaters 48a having 7 m-long erbium-doped optical fibers to repeat transmission optical fibers 46a in the section 42a, and optically amplifying repeaters 48b having 10.8 m-long erbium-doped optical fibers to repeat transmission optical fibers 46b in the section 42b. The transmission optical fibers 46a an 46b are optical fibers absolutely identical in construction and length.
摘要翻译：可用于更宽信号频带的光放大传输系统包括分为两部分42a和42b的光传输线42，光放大具有7m长掺铒光纤的中继器48a，以重复部分42a中的传输光纤46a，以及将具有10.8m长的掺铒光纤的光放大中继器48b重复部分42b中的传输光纤46b。透射光纤46a，46b是结构和长度完全相同的光纤。

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