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71. 发明申请

US20070047969A1 Differential quadrature phase-shift modulator and method for setting driving voltage thereof 有权
标题翻译：差分正交相移调制器及其驱动电压的设定方法
公开(公告)号：US20070047969A1
公开(公告)日：2007-03-01
申请号：US11274824
申请日：2005-11-16
申请人： Hisao Nakashima , Takeshi Hoshida
发明人： Hisao Nakashima , Takeshi Hoshida
IPC分类号： H04B10/04
CPC分类号： G02F1/2255 , G02F2001/212 , H04B10/505 , H04B10/5053 , H04B10/50572 , H04B10/5561 , H04L27/2075 , H04L27/2096
摘要： The present invention is directed toward a method for setting a driving voltage of a differential quadrature phase-shift modulator, this method making signal quality superior in response to an individual difference in extinction ratio due to variations in manufacture of a device. To this end, signal quality of differential quadrature phase-shift modulated light output from a differential quadrature phase-shift modulator is acquired. An average amplitude of a first or second driving voltage signal is adjusted according to the signal quality of the thus-acquired differential quadrature phase-shift modulated light.
摘要翻译：本发明涉及一种用于设定差分正交相移调制器的驱动电压的方法，该方法使得信号质量响应于由于器件的制造变化而导致的消光比的个体差别而优异。为此，获取从差分正交相移调制器输出的差分正交相移调制光的信号质量。根据这样获取的差分正交相移调制光的信号质量来调整第一或第二驱动电压信号的平均振幅。

72. 发明申请

US20070047966A1 Differential multilevel modulated optical signal receiver apparatus 失效
标题翻译：差分多电平调制光信号接收装置
公开(公告)号：US20070047966A1
公开(公告)日：2007-03-01
申请号：US11289508
申请日：2005-11-30
申请人： Kazuo Hironishi , Takeshi Hoshida
发明人： Kazuo Hironishi , Takeshi Hoshida
IPC分类号： H04B10/00
CPC分类号： H04L27/223 , H04B10/66 , H04B10/677
摘要： A first optical splitter splits an input optical signal and outputs it to first and second optical paths. A second optical splitter outputs the optical signal from the first optical path to third and fourth optical paths. A third optical splitter outputs the optical signal from the second optical path to fifth and sixth optical paths. In the second optical path, 1-symbol delay element and π/4 phase shifter element are configured. In the fourth optical path, π/2 phase shifter element is configured. First and second adjuster circuits adjust the optical path length of the second and the fourth optical paths, respectively, by temperature control. A first optical coupler couples optical signals transmitted via the third and the fifth optical paths. A second optical coupler couples optical signals transmitted via the fourth and the sixth optical paths. Photodetectors convert the optical signals from the optical couplers into electrical signals.
摘要翻译：第一光分路器分离输入光信号并将其输出到第一和第二光路。第二光分路器将光信号从第一光路输出到第三和第四光路。第三光分路器将光信号从第二光路输出到第五和第六光路。在第二光路中，配置1符号延迟元件和pi / 4移相器元件。在第四光路中，配置了pi / 2移相器元件。第一和第二调节器电路通过温度控制分别调节第二和第四光路的光路长度。第一光耦合器耦合经由第三和第五光路传输的光信号。第二光耦合器耦合经由第四和第六光路传输的光信号。光电检测器将光耦合器的光信号转换为电信号。

73. 发明申请

US20060193399A1 Optical communication device 有权
标题翻译：光通信设备
公开(公告)号：US20060193399A1
公开(公告)日：2006-08-31
申请号：US11155666
申请日：2005-06-20
申请人： Toru Katagiri , Takeshi Hoshida , Tomoo Takahara , Kentaro Nakamura , Naoki Kuwata
发明人： Toru Katagiri , Takeshi Hoshida , Tomoo Takahara , Kentaro Nakamura , Naoki Kuwata
IPC分类号： H04L27/22
CPC分类号： H04B10/5051 , H04B10/505 , H04B10/5053 , H04B10/5055 , H04B10/5561 , H04L25/03343 , H04L27/2075 , H04L27/2096
摘要： An optical sender is disclosed that operates in a Differential Quadrature Phase Shift Keying modulation scheme for high speed optical transmission and is capable of performing logical calculations at a low speed. The optical sender transmits a Differential Quadrature Phase Shift Keying (DQPSK) signal generated with modulation signals ρk and ηk so that a signal directly output from a signal receiver corresponding to the optical sender is in agreement with data signals Ik and Qk to be transmitted. The signal receiver is capable of modulation by DQPSK, and the modulation signals ρk and ηk are precoded by using the data signals Ik and Qk and the modulation signals one symbol earlier (ρk−1 and ηk−1) . The optical sender includes plural precoders that perform logical calculation simultaneously and in parallel on plural data signals one period after another period.
摘要翻译：公开了一种用于高速光传输的差分正交相移键控调制方案的光发送器，并能够以低速进行逻辑运算。光发送器发送使用调制信号rho和k和k进行生成的差分正交相移键控（DQPSK）信号，使得从与信号接收器对应的信号接收器直接输出的信号光发送器与要发送的数据信号I SUB和Q N k一致。该信号接收机能够通过DQPSK进行调制，并且通过使用数据信号I SUB和/或其调制信号对调制信号进行预编码并且调制信号先前有一个符号（rho-k-1和eta-k-1）。光发送器包括多个预编码器，这些预编码器在一个周期之后的一个周期上同时并行并行地执行多个数据信号。

74. 发明授权

US07099541B2 Optical fiber cable 有权
标题翻译：光纤电缆
公开(公告)号：US07099541B2
公开(公告)日：2006-08-29
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： 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 cable including a plurality of optical fibers, each optical fiber having a characteristic value in a middle field which is larger than characteristic values in fields other than the middle field of the optical fiber. The characteristic value in a respective field is a nonlinear refractive index of the optical fiber in the field divided by an effective cross section of the optical fiber in the field. The middle field and the characteristic value in the middle field are set as a combination to suppress a nonlinear phase shift generated in light transmitted through the plurality of optical fibers.
摘要翻译：一种包括多根光纤的光缆，每个光纤在中间场中具有比光纤的中间场以外的场中的特征值大的特征值。各个场中的特征值是场中光纤的非线性折射率除以现场光纤的有效截面。将中间场和中间场中的特征值设定为组合，以抑制在透过多根光纤的光中产生的非线性相移。

75. 发明授权

US06990296B2 Optical phase modulation 有权
公开(公告)号：US06990296B2
公开(公告)日：2006-01-24
申请号：US10028658
申请日：2001-12-21
申请人： Seemant Choudhary , Takeshi Hoshida
发明人： Seemant Choudhary , Takeshi Hoshida
IPC分类号： H04B10/04
CPC分类号： H04B10/5561 , H04B10/505 , H04B10/5051 , H04B10/5055 , H04B10/5057 , H04B10/50577
摘要： An optical modulator provides for preceding of a high data rate phase modulated optical signal. According to one embodiment, the modulator includes a first phase modulator and a second phase modulator. The first phase modulator modulates an optical carrier signal according to a first data signal to generate a modulated optical signal. The second phase modulator modulates the modulated optical signal according to a time delayed version of its optical output signal. According to another embodiment, the modulator electrically precodes multiple data streams and modulates the precoded data streams using a series of phase modulators to generate a precoded optical data signal.

76. 发明申请

US20050220388A1 Optical waveform shaper 有权
标题翻译：光波形整形器
公开(公告)号：US20050220388A1
公开(公告)日：2005-10-06
申请号：US11094642
申请日：2005-03-31
申请人： Kazuo Hironishi , Takeshi Hoshida , Hiroshi Onaka
发明人： Kazuo Hironishi , Takeshi Hoshida , Hiroshi Onaka
IPC分类号： G02F1/01 , G02F1/21 , G02F1/295 , G02F1/35 , G02F1/365 , G02F2/00
CPC分类号： H04B10/299 , G02F1/3501 , G02F1/3517 , G02F1/3519 , G02F2001/212 , G02F2201/16 , G02F2203/26
摘要： The optical waveform shaper comprises a plurality of interferometers connected in series. The transfer function of each interferometer is either one of a first transfer function, in which the second order derivative of the output optical power in respect to the input optical power is positive when the input optical power is in the neighborhood of zero, or a second transfer function, and the output optical power shows substantially periodical changes to the input optical power, or a second transfer function, in which the second order derivative of the output optical power in respect to the input optical power is negative when the input optical power is in the neighborhood of zero, or a second transfer function, and the output optical power shows substantially periodical changes to the input optical power. At least one of the interferometers uses the second transfer function.
摘要翻译：光波形整形器包括串联连接的多个干涉仪。每个干涉仪的传递函数是第一传递函数中的一个，其中输入光功率相对于输入光功率的输出光功率的二阶导数在输入光功率在零附近为正时，或第二传递函数传输函数，输出光功率对输入光功率或第二传递函数实质上周期性地改变，其中当输入光功率为输入光功率时，输出光功率的二阶导数相对于输入光功率为负值在零附近或第二传递函数中，并且输出光功率基本上周期性地改变输入光功率。至少一个干涉仪使用第二传递函数。

77. 发明申请

US20050213979A1 Wavelength division multiplexing optical transmission system and transmission wavelength control method therefor 有权
标题翻译：波分复用光传输系统及其传输波长控制方法
公开(公告)号：US20050213979A1
公开(公告)日：2005-09-29
申请号：US10914313
申请日：2004-08-10
申请人： Hisao Nakashima , Takeshi Hoshida
发明人： Hisao Nakashima , Takeshi Hoshida
IPC分类号： H04J14/00 , H04B10/071 , H04J14/02
CPC分类号： H04J14/02 , H04B10/07 , H04B10/2503 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0279
摘要： In the wavelength division multiplexing optical transmission system according to the present invention, when setting the transmission wavelengths of the wavelength-variable optical transmitter in case of addition or expansion of the optical transmitter, each transmission wavelength is set automatically so as to match with each port wavelength of the input port in the multiplexer. Therefore, the setting workload of the optical transmitter is remarkably reduced, and occurrence of incorrect setting can be avoided. Also, with a simple and low-cost structure, the cost is restrained from increasing.
摘要翻译：在根据本发明的波分复用光传输系统中，当在光发射机的添加或扩展的情况下设置波长可变光发射机的传输波长时，每个传输波长被自动设置以便与每个端口匹配多路复用器中输入端口的波长。因此，光发送机的设定工作量显着降低，可以避免错误设定的发生。而且，通过简单且低成本的结构，成本也不受限制。

78. 发明申请

US20050185967A1 Optical repeating apparatus, optical network system, optical network design supporting apparatus and design supporting method 审中-公开
标题翻译：光中继装置，光网络系统，光网络设计支持装置及设计支持方法
公开(公告)号：US20050185967A1
公开(公告)日：2005-08-25
申请号：US11111874
申请日：2005-04-22
申请人： Takeshi Hoshida
发明人： Takeshi Hoshida
IPC分类号： H04B10/02 , H04B10/16 , H04J14/02
CPC分类号： H04J14/0284 , H04B10/29 , H04J14/0227 , H04J14/0241
摘要： The present invention relates to a technique suitable for the enhancement of efficiency of wavelength allocation in an optical network. A transmission capability for each of a plurality of wavelengths available in the optical network is calculated to allocate, to a recommendation optical transmission path in the optical network for a traffic demand from the external, a wavelength having a transmission capability corresponding to a total optics transmission distance of the recommendation optical transmission path on the basis of a result of the calculation. This enables considerably reducing the number of optical repeaters to be disposed, each of which has an electrical signal regeneration function in the optical network, thereby reducing the number of devices, dissipation power, installation area and others in the optical network.
摘要翻译：本发明涉及一种适用于提高光网络中波长分配效率的技术。计算出在光网络中可用的多个波长中的每个波长的传输能力，以便将来自外部的业务需求的光网络中的推荐光传输路径分配给具有对应于总光学传输的传输能力的波长基于计算结果推荐光传输路径的距离。这能够显着地减少光中继器的数量，每个光中继器在光网络中具有电信号再生功能，从而减少光网络中的设备数量，耗散功率，安装面积等。

79. 发明授权

US06885499B1 Optical amplifying apparatus for amplifying wide-wavelength-band light, optical sending apparatus, optical transmission system, and optical amplifying method 失效
标题翻译：用于放大宽波段带光的光放大装置，光发送装置，光传输系统和光放大方法
公开(公告)号：US06885499B1
公开(公告)日：2005-04-26
申请号：US09635431
申请日：2000-08-10
申请人： Takeshi Hoshida , Takafumi Terahara
发明人： Takeshi Hoshida , Takafumi Terahara
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/30 , H04B3/04 , H04B10/07 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2942 , H04B2210/258 , H04J14/0221
摘要： There are provided a plurality of optical adjusting sections, a wavelength-multiplexing section, and a control section. The plurality of optical adjusting sections, which are provided for respective wavelength bands, amplifies light beams in the respective wavelength bands. The wavelength-multiplexing section wavelength-multiplexes amplified light beams in the respective wavelength bands. The control section controls the outputs of the respective optical amplifying sections so that optical powers of the respective wavelength bands will become approximately identical at a predetermined point when wavelength-multiplexed light of the light beams in the respective wavelength bands travels to the predetermined point. This configuration makes it possible to eliminate optical power deviations between wavelength bands that would otherwise occur when an optical signal of a plurality of wavelength bands is transmitted, and to thereby make optical SNRs uniform.
摘要翻译：提供了多个光学调整部分，波长多路复用部分和控制部分。为各波长带设置的多个光学调整部放大各波长带的光束。波长多路复用部分波长复用各波长带中的放大光束。控制部分控制各个光放大部分的输出，使得各个波长带中的光束的波分复用光行进到预定点时各个波长带的光功率将在预定点变得大致相同。这种结构使得可以消除当发射多个波长带的光信号时将发生的波长带之间的光功率偏差，从而使光SNR均匀。

80. 发明授权

US06775424B2 Modulation and filtration of optical signals 失效
标题翻译：光信号的调制和滤波
公开(公告)号：US06775424B2
公开(公告)日：2004-08-10
申请号：US10007987
申请日：2001-11-12
申请人： Seemant Choudhary , Takeshi Hoshida
发明人： Seemant Choudhary , Takeshi Hoshida
IPC分类号： G02F101
CPC分类号： H04B10/505 , H04B10/25137 , H04B10/5051 , H04B10/5053 , H04B10/5165
摘要： An optical modulator for generating an optical information signal includes a first modulator that modulates an optical carrier with a clock signal. The optical modulator further includes a filter that suppresses a residual carrier component of modulated optical signals. In addition, the optical modulator includes a second modulator for modulating an optical signal with a non-return to zero data signal. When combined, the first and second modulator and the filter operate to transform an optical carrier signal into an optical information signal that is highly tolerant to dispersion and non-linear effects in optical fibers.
摘要翻译：一种用于产生光信息信号的光调制器包括用时钟信号调制光载波的第一调制器。光调制器还包括抑制调制光信号的残留载波分量的滤波器。此外，光调制器包括用于以不归零数据信号调制光信号的第二调制器。当组合时，第一和第二调制器和滤波器操作以将光载波信号转换成对光纤中的色散和非线性效应高度耐受的光信息信号。

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