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11. 发明申请

US20110222853A1 POLARIZED-WAVE-MULTIPLEXING OPTICAL TRANSMITTER AND CONTROL METHOD OF POLARIZED-WAVE-MULTIPLEXED OPTICAL SIGNAL 有权
标题翻译：偏振波复合光学发射器和极化波多光信号的控制方法
公开(公告)号：US20110222853A1
公开(公告)日：2011-09-15
申请号：US13028677
申请日：2011-02-16
申请人： Toshiki TANAKA , Yuichi Akiyama , Masato Nishihara
发明人： Toshiki TANAKA , Yuichi Akiyama , Masato Nishihara
IPC分类号： H04J14/06
CPC分类号： H04B10/50575 , H04B10/564 , H04J14/06
摘要： A polarized-wave-multiplexing optical transmitter including: an optical combiner generating a polarized-wave-multiplexed optical signal by polarized-wave-multiplexing a first optical modulation signal and a second optical modulation signal; an optical power fluctuation portion fluctuating optical power of the first optical modulation signal and the second optical modulation signal periodically; a total-optical-power detection portion detecting fluctuation amount of total optical power of the polarized-wave-multiplexed optical signal; and an optical power controller reducing an optical power difference between the first optical modulation signal and the second optical modulation signal based on detection result of the total-optical-power detection portion.
摘要翻译：一种偏振波复用光发送器，包括：光合成器，通过对第一光调制信号和第二光调制信号进行极化波多路复用产生偏振波复用光信号; 光功率波动部分周期性地波动第一光调制信号和第二光调制信号的光功率; 总光功率检测部分，检测偏振波复用光信号的总光功率的波动量; 以及光功率控制器，其基于所述总光功率检测部的检测结果，降低所述第一光调制信号与所述第二光调制信号之间的光功率差。

12. 发明申请

US20100178065A1 DELAY PROCESSING APPARATUS, SIGNAL AMPLIFICATION APPARATUS, OPTO-ELECTRIC CONVERSION APPARATUS, ANALOG-DIGITAL CONVERSION APPARATUS, RECEIVING APPARATUS, AND RECEIVING METHOD 有权
标题翻译：延迟处理装置，信号放大装置，光电转换装置，模拟数字转换装置，接收装置和接收方法
公开(公告)号：US20100178065A1
公开(公告)日：2010-07-15
申请号：US12620540
申请日：2009-11-17
申请人： Masato Nishihara , Tomoo Takahara , Hisao Nakahima
发明人： Masato Nishihara , Tomoo Takahara , Hisao Nakahima
IPC分类号： H04B10/06 , H03M1/12
CPC分类号： H04B10/614 , H04B10/61 , H04B10/613 , H04B10/6165
摘要： A delay device that provides a delay amount to at least one of the in-phase signal and the quadrature signal, and a delay control section that controls the delay amount provided by the delay device based on a quality of the signals when the in-phase signal and the quadrature signal, to the at least one of which the delay amount is provided, at the delay device are converted into digital signals by the analog-digital converter, and the digital signal processing is carried out at the processor are provided. Thereby, the signal quality of recovered data at a receiving end of a multi-level phase modulation communication system is improved.
摘要翻译：一种向至少一个同相信号和正交信号提供延迟量的延迟装置，以及延迟控制部分，当延迟装置根据同相信号和正交信号中的信号质量，信号和正交信号至延迟装置中提供的延迟量中的至少一个被模拟数字转换器转换成数字信号，并且在处理器处执行数字信号处理。因此，提高了在多级相位调制通信系统的接收端的恢复数据的信号质量。

13. 发明申请

US20100157416A1 Optical amplifier provided with control function of pumping light, and optical transmission system using the same 有权
标题翻译：光放大器提供了泵浦光的控制功能，以及使用它的光传输系统
公开(公告)号：US20100157416A1
公开(公告)日：2010-06-24
申请号：US12659027
申请日：2010-02-23
申请人： Yasushi Sugaya , Etsuko Hayashi , Masato Nishihara
发明人： Yasushi Sugaya , Etsuko Hayashi , Masato Nishihara
IPC分类号： H01S3/30
CPC分类号： G02B6/264 , H01S3/005 , H01S3/0078 , H01S3/06758 , H01S3/094003 , H01S3/094096 , H01S3/0941 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S3/302 , H04B10/2916
摘要： In an optical transmission system according to one aspect of the present invention, for transmitting a WDM light from a transmission station to a reception station, utilizing a Raman amplifier, the Raman amplifier comprises: an optical amplification medium; a pumping light source generating a plurality of pumping lights having wavelengths different from each other; an optical device introducing the plurality of pumping lights to the optical amplification medium; and control means for controlling the pumping light source, the transmission station sends out a plurality of reference lights having wavelengths at which respective Raman gain obtained by the plurality of pumping lights reach peaks or wavelengths close to the above wavelengths, and the control means controls the plurality of pumping lights based on the optical powers of the plurality of reference lights. Thus, it becomes possible to accurately manage the optical power balance of the WDM light and the optical power of the entire WDM light.
摘要翻译：在根据本发明的一个方面的光传输系统中，为了利用拉曼放大器将来自发射站的WDM光发射到接收站，所述拉曼放大器包括：光放大介质; 产生具有彼此不同波长的多个泵浦光的泵浦光源; 将所述多个泵浦光引入所述光放大介质的光学装置; 以及用于控制所述泵浦光源的控制装置，所述发送站发出多个具有波长的参考光，所述波长使由所述多个泵浦光获得的各拉曼增益达到接近上述波长的波峰或波长，并且所述控制装置控制基于多个参考光的光功率的多个泵浦光。因此，可以精确地管理WDM光的光功率平衡和整个WDM光的光功率。

14. 发明授权

US07729588B2 Optical fiber, manufacturing method of the same, and optical amplifier 有权
标题翻译：光纤，制造方法和光放大器
公开(公告)号：US07729588B2
公开(公告)日：2010-06-01
申请号：US11847663
申请日：2007-08-30
申请人： Masato Nishihara , Etsuko Hayashi , Shinya Inagaki
发明人： Masato Nishihara , Etsuko Hayashi , Shinya Inagaki
IPC分类号： G02B6/02 , G02B6/36
CPC分类号： H01S3/06708 , C03B37/01248 , C03B37/01433 , C03B37/01838 , C03B2201/34 , C03B2203/29 , G02B6/03633 , H01S3/06729 , H01S3/094003
摘要： An optical fiber includes: a first core portion doped with rare earth ions; a second core portion having a lower refractive index than that of the first core portion, provided along an outer circumference of the first core portion, and doped with the rare earth ions; and a clad portion having a lower refractive index than that of the second core portion and provided along an outer circumference of the second core portion, and is configured such that a concentration of the rare earth ions added to the second core portion is higher than that to the first core portion. With this configuration, it is possible to suppress an amount of FWM crosstalk in an optical amplification by decreasing the length of a fiber while alleviating efficiency deterioration due to concentration quenching.
摘要翻译：光纤包括：掺杂有稀土离子的第一芯部分; 具有比所述第一芯部的折射率低的第二芯部，沿着所述第一芯部的外周设置并掺杂有所述稀土离子; 以及包层部，其具有比所述第二芯部的折射率低的折射率，并且沿着所述第二芯部的外周设置，并且被配置为使得添加到所述第二芯部的所述稀土离子的浓度高于到第一核心部分。通过这种结构，可以通过减少纤维的长度同时减轻由于浓度骤冷引起的效率劣化来抑制光放大中的FWM串扰量。

15. 发明申请

US20060203329A1 Control apparatus and method for optical amplifier, optical amplifier, optical transmission apparatus, individual band gain equalizer, wavelength multiplexing transmission apparatus, optical amplifier and wavelength multiplexing transmission system using the same equalizer 有权
标题翻译：光放大器，光放大器，光传输装置，单波段增益均衡器，波长复用传输装置，光放大器和使用相同均衡器的波长复用传输系统的控制装置和方法
公开(公告)号：US20060203329A1
公开(公告)日：2006-09-14
申请号：US11362727
申请日：2006-02-28
申请人： Masato Nishihara , Miki Onaka , Etsuko Hayashi , Shinichirou Muro
发明人： Masato Nishihara , Miki Onaka , Etsuko Hayashi , Shinichirou Muro
IPC分类号： H01S3/00
CPC分类号： H04B10/2942 , H01S3/06754 , H01S3/10015 , H01S3/10069 , H01S3/1301 , H01S3/302
摘要： A control apparatus comprises a light monitoring unit for dividing a signal wavelength band into at least a band in which output light power of an optical amplifier tends to decrease at an decrease in the number of signal wavelengths and a band including a gain deviation band, and for monitoring inputted light power for the individual divided bands, a calculation unit for obtaining the number of signal wavelengths in the individual divided bands based on a monitor result, and a target gain correction unit for correcting a target gain based on a result of the calculation. This suppresses a transient variation of signal light level due to SHB or SRS at a high speed with a simple configuration without deteriorating noise characteristic, thus enabling optical amplifiers to be further disposed in a multi-stage fashion, which can lengthen the transmission distance of a transmission system including an optical add/drop unit.
摘要翻译：一种控制装置，包括：光监视单元，用于将信号波长带分割成至少一个频带，其中信号波长数目的减少和包括增益偏差带的波段的光放大器的输出光功率趋于减小;以及用于监视各个分割频带的输入光功率;计算单元，用于基于监视结果获得各个分割频带中的信号波长数;以及目标增益校正单元，用于基于计算结果来校正目标增益。这样可以通过简单的结构，以高速度抑制由于SHB或SRS引起的信号光电平的瞬态变化，而不会使噪声特性恶化，从而能够以多级方式进一步布置光放大器，这可以延长传输距离传输系统包括光学分插单元。

16. 发明授权

US08773755B2 Optical amplifier and multicore fiber 有权
标题翻译：光放大器和多芯光纤
公开(公告)号：US08773755B2
公开(公告)日：2014-07-08
申请号：US13597977
申请日：2012-08-29
申请人： Masato Nishihara , Takeshi Hoshida
发明人： Masato Nishihara , Takeshi Hoshida
IPC分类号： H01S3/091
CPC分类号： G02B6/02038 , H01S3/0078 , H01S3/06737 , H01S3/06754 , H01S3/06758 , H01S3/06766 , H01S3/06775 , H01S3/06787 , H01S3/094011 , H01S3/094015 , H01S3/094096 , H01S3/09415 , H01S3/1608
摘要： An optical amplifier includes a pump light source that outputs pump light, and a multicore fiber that includes at least one pumping core, the pump light being input to the at least one pumping core by coupler, at least two signal light cores doped with an active substance for optical amplification, at least one signal light being input to at least one of the signal light cores, and a cladding, wherein the pump light propagating the at least one pumping core and exciting the active substance in the signal light cores, so as to amplify the at least one signal light propagating through the at least one of the signal light cores.
摘要翻译：光放大器包括输出泵浦光的泵浦光源和包括至少一个泵芯的多芯光纤，所述泵浦光通过耦合器输入到所述至少一个泵芯，所述至少两个信号光核掺杂有活性物质用于光放大的物质，至少一个信号光被输入到至少一个信号光芯和包层，其中泵浦光传播至少一个泵浦芯并激发信号光芯中的活性物质，以便以放大通过信号光芯中的至少一个传播的至少一个信号光。

17. 发明授权

US08565616B2 Polarized-wave-multiplexing optical transmitter and control method of polarized-wave-multiplexed optical signal 有权
标题翻译：偏振波复用光信号的偏振波复用光信号的控制方法
公开(公告)号：US08565616B2
公开(公告)日：2013-10-22
申请号：US13028677
申请日：2011-02-16
申请人： Toshiki Tanaka , Yuichi Akiyama , Masato Nishihara
发明人： Toshiki Tanaka , Yuichi Akiyama , Masato Nishihara
IPC分类号： H04B10/04
CPC分类号： H04B10/50575 , H04B10/564 , H04J14/06
摘要： A polarized-wave-multiplexing optical transmitter including: an optical combiner generating a polarized-wave-multiplexed optical signal by polarized-wave-multiplexing a first optical modulation signal and a second optical modulation signal; an optical power fluctuation portion fluctuating optical power of the first optical modulation signal and the second optical modulation signal periodically; a total-optical-power detection portion detecting fluctuation amount of total optical power of the polarized-wave-multiplexed optical signal; and an optical power controller reducing an optical power difference between the first optical modulation signal and the second optical modulation signal based on detection result of the total-optical-power detection portion.
摘要翻译：一种偏振波复用光发送器，包括：光合成器，通过对第一光调制信号和第二光调制信号进行极化波多路复用产生偏振波复用光信号; 光功率波动部分周期性地波动第一光调制信号和第二光调制信号的光功率; 总光功率检测部分，检测偏振波复用光信号的总光功率的波动量; 以及光功率控制器，其基于所述总光功率检测部的检测结果，降低所述第一光调制信号与所述第二光调制信号之间的光功率差。

18. 发明申请

US20130063809A1 OPTICAL AMPLIFIER AND MULTICORE FIBER 有权
标题翻译：光放大器和多光纤
公开(公告)号：US20130063809A1
公开(公告)日：2013-03-14
申请号：US13597977
申请日：2012-08-29
申请人： Masato Nishihara , Takeshi Hoshida
发明人： Masato Nishihara , Takeshi Hoshida
IPC分类号： H01S3/067 , H01S3/091 , G02B6/036
CPC分类号： G02B6/02038 , H01S3/0078 , H01S3/06737 , H01S3/06754 , H01S3/06758 , H01S3/06766 , H01S3/06775 , H01S3/06787 , H01S3/094011 , H01S3/094015 , H01S3/094096 , H01S3/09415 , H01S3/1608
摘要： An optical amplifier includes a pump light source that outputs pump light, and a multicore fiber that includes at least one pumping core, the pump light being input to the at least one pumping core by coupler, at least two signal light cores doped with an active substance for optical amplification, at least one signal light being input to at least one of the signal light cores, and a cladding, wherein the pump light propagating the at least one pumping core and exciting the active substance in the signal light cores, so as to amplify the at least one signal light propagating through the at least one of the signal light cores.
摘要翻译：光放大器包括输出泵浦光的泵浦光源和包括至少一个泵芯的多芯光纤，所述泵浦光通过耦合器输入到所述至少一个泵芯，所述至少两个信号光核掺杂有活性物质用于光放大的物质，至少一个信号光被输入到至少一个信号光芯和包层，其中泵浦光传播至少一个泵浦芯并激发信号光芯中的活性物质，以便以放大通过信号光芯中的至少一个传播的至少一个信号光。

19. 发明授权

US07715093B2 Individual band gain equalizer for optical amplifiers 有权
标题翻译：用于光放大器的单独带宽增益均衡器
公开(公告)号：US07715093B2
公开(公告)日：2010-05-11
申请号：US12016176
申请日：2008-01-17
申请人： Masato Nishihara , Miki Onaka , Etsuko Hayashi
发明人： Masato Nishihara , Miki Onaka , Etsuko Hayashi
IPC分类号： H01S3/00
CPC分类号： H04B10/2942 , H01S3/06754 , H01S3/10015 , H01S3/10069 , H01S3/1301 , H01S3/302
摘要： A control apparatus comprises a light monitoring unit for dividing a signal wavelength band into at least a band in which output light power of an optical amplifier tends to decrease at an decrease in the number of signal wavelengths and a band including a gain deviation band, and for monitoring inputted light power for the individual divided bands, a calculation unit for obtaining the number of signal wavelengths in the individual divided bands based on a monitor result, and a target gain correction unit for correcting a target gain based on a result of the calculation. This suppresses a transient variation of signal light level due to SHB or SRS at a high speed with a simple configuration without deteriorating noise characteristic, thus enabling optical amplifiers to be further disposed in a multi-stage fashion, which can lengthen the transmission distance of a transmission system including an optical add/drop unit.
摘要翻译：一种控制装置，包括：光监视单元，用于将信号波长带分割成至少一个频带，其中信号波长数目的减少和包括增益偏差带的波段的光放大器的输出光功率趋于减小;以及用于监视各个分割频带的输入光功率;计算单元，用于基于监视结果获得各个分割频带中的信号波长数;以及目标增益校正单元，用于基于计算结果来校正目标增益。这样可以通过简单的结构，以高速度抑制由于SHB或SRS引起的信号光电平的瞬态变化，而不会使噪声特性恶化，从而能够以多级方式进一步布置光放大器，这可以延长传输距离传输系统包括光学分插单元。

20. 发明授权

US07551347B2 Optical amplification characteristics simulation apparatus and optical amplification characteristics simulation method 失效
标题翻译：光放大特性仿真装置及光放大特性仿真方法
公开(公告)号：US07551347B2
公开(公告)日：2009-06-23
申请号：US11979370
申请日：2007-11-01
申请人： Etsuko Hayashi , Shunsuke Ono , Setsuhisa Tanabe , Shinichirou Muro , Masato Nishihara
发明人： Etsuko Hayashi , Shunsuke Ono , Setsuhisa Tanabe , Shinichirou Muro , Masato Nishihara
IPC分类号： H04B10/17
CPC分类号： H01S3/06754 , H01S3/0007 , H01S3/0064 , H01S3/06758 , H01S3/0677 , H01S3/09415 , H01S3/1608 , H01S2301/04
摘要： In an optical amplification characteristics simulation apparatus according to the present invention, using spectrums of a signal light input to an optical amplifier and a characteristic parameter for amplification medium, gain wavelength characteristics of the amplification medium are calculated. A calculating formula for the above has a parameter corresponding to a gain fluctuation portion due to a gain spectral hole burning (GSHB) phenomenon, and this parameter is defined by a function obtained by modeling a physical phenomenon in which a population inversion rate is reduced due to the GSHB, based on that electron occupation numbers in each Stark level on the end level side are increased. Then, based on the calculated gain wavelength characteristics, the output power of the signal light is obtained, to thereby perform the optical amplification characteristics simulation on the optical amplifier. As a result, it is possible to construct a high versatile calculation model based on the physical phenomenon for the gain fluctuation due to the GSHB, to thereby simulate with high precision the optical amplification characteristics of the optical amplifier under arbitrary conditions.
摘要翻译：在根据本发明的光放大特性模拟装置中，使用输入到光放大器的信号光的光谱和放大介质的特性参数，计算放大介质的增益波长特性。上述计算公式由于增益谱孔燃烧（GSHB）现象而具有与增益变动部分相对应的参数，该参数由通过模拟体积反转率减少的物理现象获得的函数来定义根据GSHB的最终级别的每个Stark级别的电子占有数量增加。然后，基于计算出的增益波长特性，获得信号光的输出功率，从而对光放大器进行光放大特性仿真。结果，可以基于由于GSHB引起的增益波动的物理现象构建高通用性计算模型，从而以任意条件高精度模拟光放大器的光放大特性。

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