公开(公告)号：US07843631B2

公开(公告)日：2010-11-30

申请号：US11859842

申请日：2007-09-24

申请人： Miki Onaka ,  Hideaki Sugiya ,  Yasushi Sugaya ,  Etsuko Hayashi

发明人： Miki Onaka ,  Hideaki Sugiya ,  Yasushi Sugaya ,  Etsuko Hayashi

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/1305 ,  H04B10/296

摘要： The present invention relates to an apparatus for controlling a gain of an optical amplifier, and the apparatus comprises a target gain calculating unit for calculating, as a target gain for an optical amplifier, a value obtained by increasing or decreasing a gain (output) of signal light as the number of wavelengths of wavelength-multiplexed signal light decreases, and a control signal outputting unit for outputting a control signal to the optical amplifier so as to amplify the wavelength-multiplexed signal light with the target gain calculated by the target gain calculating unit. This promptly suppresses a fluctuation of signal light level, particularly, a fluctuation of output light power of an optical amplifier stemming from a variation of the number of wavelengths of wavelength-multiplexed signal light.

摘要翻译： 本发明涉及一种用于控制光放大器的增益的装置，该装置包括：目标增益计算单元，用于计算通过增加或减少增益（输出）获得的值作为光放大器的目标增益 波长多路复用信号光的波长数的信号光减少;以及控制信号输出单元，用于向光放大器输出控制信号，以便以目标增益计算的目标增益放大波分复用信号光 单元。 这迅速地抑制信号光电平的波动，特别是由波长多路复用信号光的波长数的变化导致的光放大器的输出光功率的波动。

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。

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。

公开(公告)号：US20080080865A1

公开(公告)日：2008-04-03

申请号：US11843084

申请日：2007-08-22

申请人： Shinichirou Muro ,  Hideaki Sugiya ,  Yasushi Sugaya ,  Etsuko Hayashi

发明人： Shinichirou Muro ,  Hideaki Sugiya ,  Yasushi Sugaya ,  Etsuko Hayashi

IPC分类号： H04J14/02

CPC分类号： H04J14/0221 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0212

摘要： The present invention relates to an optical transmission apparatus capable of suppressing a transitional gain variation when a number of signal wavelengths changes, and maintaining communication quality in optical signals. The optical transmission apparatus is provided with an optical power control device that varies light power of light for each wavelength component corresponding to a wavelength channel, the light including signal light and spontaneous emission light; a wavelength arrangement information obtaining unit that obtains arrangement information of the wavelength channel of the signal light; and a control unit that controls the power control device based on the arrangement information obtained at the wavelength arrangement information obtaining unit so that light power of a wavelength component of the signal light and light power of a wavelength component other than the wavelength component of the signal light become substantially equal.

摘要翻译： 光传输装置技术领域本发明涉及能够抑制多个信号波长变化时的过渡增益变动，并维持光信号的通信质量的光传输装置。 光传输装置设置有光功率控制装置，其对与波长信道对应的每个波长分量改变光的光功率，所述光包括信号光和自发发射光; 波长配置信息获取单元，获取所述信号光的波长信道的布置信息; 以及控制单元，其基于在所述波长配置信息获取单元获得的布置信息来控制所述功率控制装置，使得所述信号光的波长分量的光功率和除了所述信号的波长分量之外的波长分量的光功率 光变得基本相等。

公开(公告)号：US07268936B2

公开(公告)日：2007-09-11

申请号：US10761296

申请日：2004-01-22

申请人： Miki Onaka ,  Etsuko Hayashi ,  Yasushi Sugaya

发明人： Miki Onaka ,  Etsuko Hayashi ,  Yasushi Sugaya

IPC分类号： H04B10/18 ,  H01S3/10

CPC分类号： H04B10/291 ,  H04B10/2569

摘要： An object of the present invention is to provide at low cost, a highly functional and small size optical amplifier, which realizes a polarization mode dispersion (PMD) compensation function and an optical amplifying function, with a simple construction. To this end, the optical amplifier of the present invention comprises: a polarization control section that controls the polarization state of input signal light; a PMD generation section that receives the signal light from the polarization control section at a polarization-preserving fiber thereof doped with a rare earth element, and gives a differential group delay between orthogonal polarization mode components of the signal light to perform PMD compensation and at the same time amplifies the signal light; a pumping light supply section that supplies pumping light to the polarization-preserving fiber; a monitoring section that monitors the PMD generation state of the signal light from the PMD generation section, and the like; and a control section that controls the polarization control section and the pumping light supply section based on the monitor results of the monitoring section.

摘要翻译： 本发明的目的是提供一种低功耗和小尺寸的光放大器，其实现了具有简单结构的偏振模色散（PMD）补偿功能和光放大功能。 为此，本发明的光放大器包括：偏振控制部，其控制输入信号光的偏振状态; PMD生成部，其在掺杂有稀土元素的偏振光保留光纤处接收来自偏振光控制部的信号光，并且在信号光的正交偏振模式分量之间给出差分组延迟以执行PMD补偿，并且在 同时放大信号灯; 泵浦光供给部，其向所述偏振光保持光纤供给泵浦光; 监视来自PMD生成部的信号光的PMD生成状态的监视部等， 以及控制部，其基于监视部的监视结果来控制偏振控制部和泵送光供给部。

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。

公开(公告)号：US20060023298A1

公开(公告)日：2006-02-02

申请号：US11085082

申请日：2005-03-22

申请人： Chihiro Ohshima ,  Etsuko Hayashi

发明人： Chihiro Ohshima ,  Etsuko Hayashi

IPC分类号： H01S3/00

CPC分类号： H04B10/296 ,  H01S3/06754 ,  H01S3/2383 ,  H04B2210/256 ,  H04B2210/258

摘要： In an optical amplifier of the invention, a WDM signal light is separated into N components by a demultiplexer after which each component is amplified by N optical amplifier sections, and the output light level of each optical amplifier section is controlled to a constant level by respective control circuits and multiplexed in a multiplexer. At this time, in the demultiplexer, the bandwidth of the signal light output from each of the output ports is designed to have a different value, so that inter-wavelength deviation in the optical output level that occurs in each of the optical amplifier sections, falls within a preset range. Moreover, the constant output control of each control circuit is performed by individually adjusting the gain of each of the optical amplifier sections in relation to fluctuations in the power level without channel number changes of the WDM signal light input to the demultiplexer. As a result, deviation in the optical output level over the entire wavelength bandwidth of the WDM signal light for fluctuations in the input level of the WDM signal light, can be suppressed to a minimum, with a simple configuration.

摘要翻译： 在本发明的光放大器中，通过解复用器将WDM信号光分离为N个分量，之后每个分量由N个光放大器部分放大，并且每个光放大器部分的输出光电平被相应地控制为恒定电平 控制电路并复用在多路复用器中。 此时，在解复用器中，从各个输出端口输出的信号光的带宽被设计为具有不同的值，使得在每个光放大器部分中出现的光输出电平的波长间偏差， 落在预设范围内。 而且，各个控制电路的恒定输出控制是通过分别调整每个光放大器部分的增益而与功率电平的波动相分离地进行的，而无需输入到解复用器的WDM信号光的信道数量变化。 结果，能够以简单的结构将WDM信号光的输入电平的波动的WDM信号光的整个波长带宽的光输出电平的偏差抑制到最小。

公开(公告)号：US20050185885A1

公开(公告)日：2005-08-25

申请号：US10878619

申请日：2004-06-29

申请人： Miki Onaka ,  Etsuko Hayashi ,  Hiroshi Onaka

发明人： Miki Onaka ,  Etsuko Hayashi ,  Hiroshi Onaka

IPC分类号： G02B6/02 ,  G02B6/293 ,  G02B6/34 ,  G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/30 ,  H04J14/02 ,  H01S5/50

CPC分类号： H01S3/302 ,  G02B6/02085 ,  G02B6/29319 ,  G02B6/2938 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094015 ,  H01S3/094019 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/0941 ,  H04B10/291 ,  H04J14/02

摘要： An object of the invention is to provide an optical multiplexing method and an optical multiplexer, capable of fixing lights of different wavelengths at required wavelengths to stably multiplex them with a simple optical circuit configuration. To this end, in the present optical multiplexer, there is provided a tilted FBG, which is formed on an optical fiber through which a first light is propagated, with a grating direction thereof being tilted to an axial direction of the optical fiber, and has the sufficiently high reflectance to a second light (multiplexed light) of a wavelength different from that of the first light. The multiplexed light emitted from a light source is irradiated to the tilted FBG, via a free space from an angle direction determined according to a grating pitch of the tilted FBG and the wavelength of the multiplexed light, to be coupled within the optical fiber. Further, a low reflective FBG reflecting light coupled within the optical fiber is formed on the optical fiber, to achieve a resonance structure between the low reflective FBG and the light source, thereby stabling the wavelength of the multiplexed light.

摘要翻译： 本发明的目的是提供一种光复用方法和光复用器，其能够固定所需波长的不同波长的光以便以简单的光电路配置来稳定地多路复用它们。 为此，在本光传输器中，提供了一种倾斜的FBG，其形成在光纤上，第一光通过该光纤传播，其光栅方向与光纤的轴向倾斜，并且具有 与第一光不同的波长的第二光（复用光）具有足够高的反射率。 从光源发射的复用光经由自由空间从根据倾斜FBG的光栅间距确定的角度方向和复用光的波长照射到倾斜的FBG，以在光纤内耦合。 此外，在光纤上形成反射耦合在光纤内的光的低反射FBG，以实现低反射FBG和光源之间的谐振结构，从而稳定复用光的波长。

公开(公告)号：US06441951B1

公开(公告)日：2002-08-27

申请号：US09858509

申请日：2001-05-17

申请人： Tomoto Tanaka ,  Miki Onaka ,  Etsuko Hayashi ,  Yasushi Sugaya

发明人： Tomoto Tanaka ,  Miki Onaka ,  Etsuko Hayashi ,  Yasushi Sugaya

IPC分类号： H01S300

CPC分类号： H01S3/2375 ,  H01S3/06758 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1608 ,  H01S3/302 ,  H01S2301/02 ,  H01S2301/04 ,  H04B10/0731 ,  H04B10/0795 ,  H04B10/0797 ,  H04B10/2916

摘要： An object of the invention is to provide an optical amplification apparatus using Raman amplification, which can reliably judge an input interruption of signal light and can shut down the supply of excitation light in accordance with a judged input interruption of the signal light. To this end, the optical amplification apparatus of the present invention comprises an input interruption detection means for detecting a noise light component due to the Raman amplification, and judging an input interruption of the signal light based on the detection result, and further comprises a shut down control means for shutting down supply of the excitation light when an input interruption of the signal light is judged by the input interruption detection means. The input interruption detection means computes the noise light power due to the Raman amplification in accordance with monitored excitation light power, and corrects a threshold value as a judgment reference for an input interruption using the calculation result, and judges an input interruption of the signal light when a monitored value of the input light power to a second optical amplifying means is less than the post-correction threshold value.

摘要翻译： 本发明的目的是提供一种使用拉曼放大的光放大装置，其可以可靠地判断信号光的输入中断，并且可以根据判断的信号光的输入中断来关闭激发光的供给。 为此，本发明的光放大装置包括输入中断检测装置，用于检测由于拉曼放大引起的噪声光分量，并根据检测结果判断信号光的输入中断，还包括关闭 降低控制装置，用于当由输入中断检测装置判断信号光的输入中断时，关闭激励光的供应。 输入中断检测装置根据监视的激发光功率计算由于拉曼放大引起的噪声光功率，并且使用计算结果校正作为输入中断的判断基准的阈值，并且判断信号光的输入中断 当第二光放大装置的输入光功率的监视值小于校正后阈值时。

公开(公告)号：US07751119B2

公开(公告)日：2010-07-06

申请号：US12197631

申请日：2008-08-25

申请人： Miki Onaka ,  Etsuko Hayashi

发明人： Miki Onaka ,  Etsuko Hayashi

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H01S3/06758 ,  H01S3/06716 ,  H01S3/094092 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H04B10/291 ,  H04B2210/003

摘要： According to an optical surge suppressive type optical amplifier in the present invention, for a WDM optical amplifier having a multi-stages amplification configuration in which a plurality of optical amplifying means is connected in series, an optical amplifying medium capable of causing a homogeneous up-conversion (HUC) phenomenon is applied to the optical amplifying means on the signal light output side, so that an optical surge is suppressed utilizing the degradation of gain efficiency by the HUC caused at the time when the input power is decreased. Further, for a one wave optical amplifier, an optical amplifying medium capable of causing a pair induced quenching (PIQ) phenomenon is applied to the optical amplifying means on the signal light input side, so that the optical surge is suppressed utilizing the degradation of output power efficiency by the PIQ caused at the time when the input power is increased. As a result, it is possible to provide a low cost optical amplifier capable of effectively suppressing the optical surge without leading the complexity of control circuit or optical circuit configuration.

摘要翻译： 根据本发明的光浪涌抑制型光放大器，对于具有多个放大结构的WDM光放大器，其中多个光放大装置串联连接，能够产生均匀上升的光放大介质， 转换（HUC）现象被应用于信号光输出侧的光放大装置，从而通过在输入功率降低时引起的HUC的增益效率的劣化来抑制光波动。 此外，对于单波长光放大器，能够对信号光输入侧的光放大装置施加能够引起成对感应淬灭（PIQ）现象的光放大介质，从而利用输出的劣化来抑制光波动 当输入功率增加时，由PIQ引起的功率效率。 结果，可以提供一种能够有效地抑制光波动的低成本光放大器，而不会导致控制电路或光电路配置的复杂性。