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61. 发明授权

US6097535A Method for optical amplification and system for carrying out the method 失效
标题翻译：光放大方法及其实施方法
公开(公告)号：US6097535A
公开(公告)日：2000-08-01
申请号：US6049
申请日：1998-01-12
申请人： Takafumi Terahara
发明人： Takafumi Terahara
IPC分类号： H01S3/067 , H01S3/06 , H01S3/10 , H04B10/2507 , H04B10/296 , H04B10/297 , H01S3/00
CPC分类号： H04B10/294 , H01S3/10007 , H01S2301/04
摘要： A method and system for optical amplification suitable for wavelength division multiplexing (WDM). Signal light is amplified to obtain amplified signal light. The amplified signal light is gain equalized so that a deviation in signal-to-noise ratio of the amplified signal light with respect to wavelength is reduced to obtain first equalized signal light. The first equalized signal light is amplified to obtain amplified equalized signal light. The amplified equalized signal light is gain equalized so that a deviation in signal power of the amplified equalized signal light with respect to wavelength is reduced. This method is characterized in that in performing optical amplification of signal light plural times gain equalization is performed in the middle stage of the optical amplification so that the deviation in signal-to-noise ratio is reduced, and gain equalization is performed after the final stage of the optical amplification so that the deviation in signal power is reduced. According to this method, gain equalization can be easily performed on both the deviation in signal power and the deviation in signal-to-noise ratio.
摘要翻译：一种适用于波分复用（WDM）的光放大方法和系统。信号光被放大以获得放大的信号光。放大的信号光被增益均衡，使得放大的信号光的相对于波长的信噪比的偏差减小，以获得第一均衡的信号光。第一均衡信号光被放大以获得放大的均衡信号光。放大后的均衡信号光被增益均衡，使得放大的均衡信号光的相对于波长的信号功率的偏差减小。该方法的特征在于，在进行光放大的信号光的情况下，在光放大的中间阶段进行多次增益均衡化，使得信噪比的偏差降低，在最后阶段进行增益均衡使得信号功率的偏差减小。根据该方法，可以容易地对信号功率的偏差和信噪比的偏差进行增益均衡化。

62. 发明授权

US6052221A Optical receiver having a function for suppressing useless intensity modulation components 失效
标题翻译：具有抑制无用强度调制成分的功能的光接收机
公开(公告)号：US6052221A
公开(公告)日：2000-04-18
申请号：US63036
申请日：1998-04-21
申请人： Takafumi Terahara
发明人： Takafumi Terahara
IPC分类号： H03F3/08 , H04B10/07 , H04B10/2507 , H04B10/293 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/69 , H01S3/00 , H04B10/06
CPC分类号： H04B10/67 , H04B10/673
摘要： An optical receiver for suppressing a useless intensity modulation component having an optical to electrical converter for converting an optical main signal to an electrical signal, an identifying device for identifying the electrical signal converted in the optical to electrical converter, an optical amplifier for amplifying the optical main signal provided on a preceding stage of the optical to electrical converter, an electrical amplifier for amplifying the converted electrical signal for a main signal provided on a rear stage of the optical to electrical converter, and a capacitor coupled on the preceding stage of the electrical amplifier having a characteristic of a low cut-off frequency higher than a polarization scrambling frequency or a monitoring control signal frequency.
摘要翻译：一种用于抑制具有用于将光学主信号转换为电信号的光电转换器的无用强度调制部件的光接收器，用于识别在光电转换器中转换的电信号的识别装置，用于放大光电转换器的光放大器提供在光电转换器的前级的主信号，用于放大设置在光电转换器的后级上的主信号的转换电信号的电放大器，以及耦合在电 - 电转换器的前级上的电容器放大器具有高于偏振加扰频率或监视控制信号频率的低截止频率的特性。

63. 发明授权

US5841557A Method and apparatus for scrambling the polarization of signal lights forming a wavelength division multiplexed signal light 失效
标题翻译：用于扰乱形成波分复用信号光的信号光的偏振的方法和装置
公开(公告)号：US5841557A
公开(公告)日：1998-11-24
申请号：US734605
申请日：1996-10-22
申请人： Kazue Otsuka , Hiroshi Onaka , Takafumi Terahara , Takao Naito
发明人： Kazue Otsuka , Hiroshi Onaka , Takafumi Terahara , Takao Naito
IPC分类号： H04J14/00 , G02B6/34 , H04B10/03 , H04B10/032 , H04B10/2537 , H04B10/2557 , H04B10/2563 , H04J14/02 , H04J14/04 , H04J14/06
CPC分类号： H04J14/02 , H04B10/2557 , H04B10/2563 , H04B10/532 , G02B6/2786 , H04J14/06
摘要： A method and apparatus for scrambling the polarization of signal lights combined into a wavelength division multiplexed signal light, to suppress non-linear optical effect and thereby improve transmission quality. For example, each signal light has a different polarization before being combined into a wavelength division multiplexed signal light. The polarization of the wavelength division multiplexed signal light can then be scrambled. Alternatively, the polarization of each signal light can be scrambled at a different scrambling frequency before being combined into the wavelength division multiplexed signal light.
摘要翻译：一种将信号光的偏振加扰成波分复用信号光的方法和装置，以抑制非线性光学效应，从而提高传输质量。例如，每个信号光在被组合成波分复用信号光之前具有不同的偏振。波分复用信号光的偏振可以被加扰。或者，每个信号光的偏振可以在被组合成波分复用信号光之前以不同的加扰频率被加扰。

64. 发明授权

US5729372A Optical transmission method and apparatus and optical amplification method and apparatus for optical communication system 失效
公开(公告)号：US5729372A
公开(公告)日：1998-03-17
申请号：US712958
申请日：1996-09-12
申请人： Takafumi Terahara , Terumi Chikama , Masuo Suyama , Takao Naito
发明人： Takafumi Terahara , Terumi Chikama , Masuo Suyama , Takao Naito
IPC分类号： G02F1/35 , H01S3/10 , H04B1/16 , H04B10/2507 , H04B10/2563 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/04
CPC分类号： H04B10/2572 , H04B10/291 , H04B10/2912 , H04B10/2918 , H04B10/2939 , H04B1/163
摘要： The invention provides an optical transmission method and apparatus suitable for use with a terminal station apparatus for an optical communication system for a very long distance of up to several thousands kilometers across an ocean as well as an optical amplification method and apparatus suitable for use with a repeater for an optical communication system. The methods and apparatus are improved in that the excessive loss in an optical amplifier and the variation of the branching ratio are suppressed to suppress the variation of the gain to suppress the polarization dependency of the loss or the gain on a transmission line of the optical communication system. The optical transmission apparatus comprises a depolarized light source for outputting depolarized light, and an external modulator for modulating light from the depolarized light source.

65. 发明授权

US07382979B2 Wavelength dispersion compensation design method and a system thereof 有权
标题翻译：波长色散补偿设计方法及其系统
公开(公告)号：US07382979B2
公开(公告)日：2008-06-03
申请号：US11316961
申请日：2005-12-27
申请人： Yuichi Akiyama , Takafumi Terahara , Takeshi Hoshida , Hisao Nakashima
发明人： Yuichi Akiyama , Takafumi Terahara , Takeshi Hoshida , Hisao Nakashima
IPC分类号： H04B10/08 , H04B10/12 , H04B10/00 , H04J14/02
CPC分类号： H04B10/2513
摘要： The present invention discloses a design method of wavelength dispersion compensation of a desired link that is extracted from an optical network, the link including two or more spans, and two or more nodes (N1, N4) that are equipped with an add/drop function, as shown in FIG. 2. All residual dispersion ranges of paths that reach corresponding nodes are adjusted to fall within predetermined tolerable residual dispersion ranges that are set up for all the paths of the link by adjusting wavelength dispersion compensators provided to each of the spans.
摘要翻译：本发明公开了一种从光网络提取的期望链路的波长色散补偿的设计方法，包括两个或多个跨度的链路，以及两个或更多个节点（N 1，N 4），其配备有添加/ drop功能，如图3所示。 2。通过调整提供给每个跨度的波长色散补偿器，到达对应节点的路径的所有残余色散范围被调整到落在通过链路的所有路径设置的预定容许残余色散范围内。

66. 发明授权

US07307782B2 Raman amplifier and optical communication system including the same 失效
标题翻译：拉曼放大器和光通信系统包括相同
公开(公告)号：US07307782B2
公开(公告)日：2007-12-11
申请号：US10208198
申请日：2002-07-31
申请人： Tetsufumi Tsuzaki , Motoki Kakui , Takafumi Terahara , Junichi Kumasako
发明人： Tetsufumi Tsuzaki , Motoki Kakui , Takafumi Terahara , Junichi Kumasako
IPC分类号： H01S3/00
CPC分类号： H01S3/302 , H01S3/06725 , H01S3/06754 , H01S3/094003 , H01S3/09408 , H01S3/094096
摘要： The present invention relates to a Raman amplifier where flexibility in device design considering both of Raman amplification and dispersion compensation is high. In the Raman amplifier, the Raman amplification optical fiber included in the optical amplification section and the dispersion compensating optical fiber included in the dispersion compensation section are arranged while being optically connected to each other. Since the optical amplification section and the dispersion compensation section are provided as independent optical devices, one device can be designed without being restricted to the design conditions of the other device.
摘要翻译：拉曼放大器本发明涉及考虑拉曼放大和色散补偿的器件设计中的灵活性高的拉曼放大器。在拉曼放大器中，包括在光放大部分中的拉曼放大光纤和包括在色散补偿部分中的色散补偿光纤被布置成彼此光学连接。由于光放大部分和色散补偿部分被设置为独立的光学器件，所以可以设计一个器件而不限于另一个器件的设计条件。

67. 发明申请

US20070053692A1 Method and system for transmitting information in an optical communication system using distributed amplification 有权
标题翻译：用于在使用分布式放大的光通信系统中发送信息的方法和系统
公开(公告)号：US20070053692A1
公开(公告)日：2007-03-08
申请号：US09853323
申请日：2001-05-10
申请人： Takeshi Hoshida , Hiroshi Onaka , Takafumi Terahara
发明人： Takeshi Hoshida , Hiroshi Onaka , Takafumi Terahara
IPC分类号： H04J14/02
CPC分类号： H04B10/2916 , H01S3/094011 , H01S3/302
摘要： A method and system for transmitting information in an optical communication system includes modulating a non-intensity characteristic of an optical carrier signal with a data signal to generate an optical information signal. The optical information signal is transmitted over an optical link. The optical information signal is amplified over a length of the optical link with a co-launched amplification signal traveling in the optical link in a same direction as the optical information signal.
摘要翻译：用于在光通信系统中发送信息的方法和系统包括用数据信号调制光载波信号的非强度特性以产生光信息信号。光信息信号通过光链路传输。光信息信号在光链路的长度上以与光信息信号相同的方向在光链路中行进的共同放大信号放大。

68. 发明授权

US06941074B2 Bidirectionally transmittable optical wavelength division multiplexed transmission system 有权
标题翻译：双向可传输光波分复用传输系统
公开(公告)号：US06941074B2
公开(公告)日：2005-09-06
申请号：US09800891
申请日：2001-03-08
申请人： Kentaro Nakamura , Takafumi Terahara , Junichi Kumasako , Rainer Hainberger
发明人： Kentaro Nakamura , Takafumi Terahara , Junichi Kumasako , Rainer Hainberger
IPC分类号： H01S3/30 , H01S3/06 , H01S3/067 , H04B10/00 , H04B10/29 , H04B10/294 , H04B10/297 , H04J14/00 , H04J14/02 , H04L5/14 , H04B10/02 , H04B10/08 , H04B10/12
CPC分类号： H04B10/2971 , H04B10/2503 , H04B10/2916
摘要： Different bands (C-band and L-band) are allotted respectively to an upstream optical signal and a downstream optical signal. In a transmission-path optical fiber for Raman amplification, the C-band optical signal is amplified by pumping light from a C-band pumping light source, and the L-band optical signal is amplified by pumping light from an L-band pumping light source. As a result of this configuration, the optical signals are Raman-amplified through backward pumping in both upstream and downstream directions, whereby negative effects, which could be exerted on the optical signals by forward pumping, can be avoided.
摘要翻译：分别将不同的频带（C波段和L波段）分配给上行光信号和下行光信号。在用于拉曼放大的传输路径光纤中，C波段光信号通过泵浦来自C波段泵浦光源的光而被放大，并且L波段光信号通过泵浦来自L波段泵浦光的光而被放大资源。作为该结构的结果，光信号通过在上下游方向上的反向泵浦而被拉曼放大，由此可以避免通过正向泵浦对光信号施加的负面影响。

69. 发明申请

US20050157991A1 Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable 有权
标题翻译：分布式光放大装置，光通信站，光通信系统，光缆
公开(公告)号：US20050157991A1
公开(公告)日：2005-07-21
申请号：US11066537
申请日：2005-02-28
申请人： Takafumi Terahara , Rainer Hainberger , Takeshi Hoshida
发明人： Takafumi Terahara , Rainer Hainberger , Takeshi Hoshida
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/30 , H04B10/077 , H04B10/079 , H04B10/2507 , H04B10/2519 , H04B10/2525 , H04B10/2537 , H04B10/29 , H04B10/294 , H04B10/297 , G02B6/44
CPC分类号： H04B10/2916 , G02B6/02252 , G02B6/02266 , G02B6/262 , G02B6/29377 , H01S3/302 , H04B10/25253 , H04B2210/003
摘要： An optical fiber transmission line including first, second and third optical fibers connected together so that light travels through the transmission line from the first optical fiber, then through the second optical fiber and then through the third optical fiber. The first, second and third optical fibers have first, second and third characteristic values, respectively. The second characteristic value is larger than the first characteristic value and the third characteristic value. The characteristic value of a respective optical fiber being a nonlinear refractive index of the optical fiber divided by an effective cross section of the optical fiber. Pump light is supplied to the transmission line so that Raman amplification occurs in the transmission line as an optical signal travels through the transmission line.
摘要翻译：一种光纤传输线，包括连接在一起的第一，第二和第三光纤，使得光从第一光纤传播通过传输线，然后穿过第二光纤，然后通过第三光纤。第一，第二和第三光纤分别具有第一，第二和第三特性值。第二特征值大于第一特征值和第三特征值。作为光纤的非线性折射率的各光纤的特征值除以光纤的有效截面。泵浦光被提供给传输线，使得当光信号通过传输线路时，在传输线路中发生拉曼放大。

70. 发明授权

US06862134B2 Distributed optical amplifier, amplifying method, and optical communication system 失效
标题翻译：分布式光放大器，放大法和光通信系统
公开(公告)号：US06862134B2
公开(公告)日：2005-03-01
申请号：US10321522
申请日：2002-12-18
申请人： Takafumi Terahara , Takeshi Hoshida
发明人： Takafumi Terahara , Takeshi Hoshida
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H01S3/13 , H01S3/30 , H04B10/07 , H04B10/2519 , H04B10/2525 , H04B10/2537 , H04B10/255 , H04B10/2557 , H04B10/2563 , H04B10/29 , H04B10/296 , H01S3/00
CPC分类号： H01S3/302 , H01S3/1301 , H01S3/1302
摘要： A distributed optical amplifier comprises an optical amplifying medium for distributed optical amplification, light supplying means for supplying a pump light to said optical amplifying medium, a pump light detecting part for detecting optical power of said pump light, adjusting means for adjusting an incident power of the light amplified with said optical amplifying medium, and control means for adjusting incident optical power of said light according to an output of said pump light detecting means. Because of this, the present invention can be controlled with a simplified structure of an optical power of an pump light, and an optical power of light to be amplified. A distributed optical amplifier as such can, for example, be applied in optical transmission systems.
摘要翻译：分布式光放大器包括用于分布式光放大的光放大介质，用于向所述光放大介质提供泵浦光的供光装置，用于检测所述泵浦光的光功率的泵浦光检测部分，用于调节所述泵浦光的入射功率的调节装置用所述光放大介质放大的光，以及根据所述泵浦光检测装置的输出调节所述光的入射光功率的控制装置。因此，可以通过泵浦光的光功率的简化结构和要放大的光的光功率来控制本发明。例如，分布式光放大器可以应用于光传输系统中。

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