公开(公告)号：US06738184B2

公开(公告)日：2004-05-18

申请号：US09949873

申请日：2001-09-12

申请人： Etsuko Hayashi ,  Yasushi Sugaya ,  Yoshihito Onoda ,  Keiko Sasaki

发明人： Etsuko Hayashi ,  Yasushi Sugaya ,  Yoshihito Onoda ,  Keiko Sasaki

IPC分类号： H04B1012

CPC分类号： H01S3/06754 ,  H01S3/094011

摘要： Optical signals (multi-wavelength light) are guided to an EDF. The EDF is supplied with pump light generated by a first and a second pump light sources. Dummy light is generated by a dummy light source and supplied to the EDF. The wavelength of the dummy light is shorter than a wavelength range in which the optical signals are allocated.

摘要翻译： 光信号（多波长光）被引导到EDF。 EDF被提供有由第一和第二泵浦光源产生的泵浦光。 虚拟光由虚拟光源产生并提供给EDF。 虚拟光的波长比分配光信号的波长范围短。

公开(公告)号：US08116626B2

公开(公告)日：2012-02-14

申请号：US12453060

申请日：2009-04-28

申请人： Tomoaki Takeyama ,  Ichiro Nakajima ,  Keiko Sasaki ,  Shinichirou Muro ,  Etsuko Hayashi

发明人： Tomoaki Takeyama ,  Ichiro Nakajima ,  Keiko Sasaki ,  Shinichirou Muro ,  Etsuko Hayashi

IPC分类号： H04B10/08 ,  H04B10/04

CPC分类号： H04B10/07955 ,  H04J14/0221

摘要： In an optical transmission apparatus, levels of signal lights obtained by demultiplexing a WDM signal and corresponding to channels are detected, based on which a channel in which a signal is transmitted and a channel in which no signal is transmitted are determined. An attenuation amount of a channel in which no signal is transmitted in a predetermined range from the channel in which the signal is transmitted is set to a value equal to an attenuation amount of the channel in which the signal is transmitted. An attenuation amount of a channel in which no signal is transmitted out of the predetermined range from the channel in which the signal is transmitted is set to a value larger than the attenuation amount of the channel in which the signal is transmitted. The signal lights are attenuated based on the values and multiplexed.

摘要翻译： 在光传输装置中，检测通过对WDM信号进行解复用和对应于信道而获得的信号光的电平，基于该信号的信号被发送的信道和没有发送信号的信道被确定。 在发送信号的信道的预定范围内不发送信号的信道的衰减量被设定为等于发送信号的信道的衰减量的值。 没有信号从发送信号的信道发送出预定范围的信道的衰减量被设置为大于发送信号的信道的衰减量的值。 信号灯根据值进行衰减并进行复用。

公开(公告)号：US08054455B2

公开(公告)日：2011-11-08

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： H01S3/00

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：US07688498B2

公开(公告)日：2010-03-30

申请号：US10998064

申请日：2004-11-29

申请人： Miki Onaka ,  Etsuko Hayashi ,  Hiroshi Onaka

发明人： Miki Onaka ,  Etsuko Hayashi ,  Hiroshi Onaka

IPC分类号： H01S3/00

CPC分类号： H04B10/2941 ,  H01S3/06754 ,  H01S3/1305 ,  H04B10/071 ,  H04B10/07955

摘要： An optical amplifier of the present invention comprises: an optical amplifying circuit which amplifies a signal light; an optical reflection medium which is disposed on an optical fiber connected to the optical amplifying circuit and is capable of reflecting a noise light which exists in a predetermined wavelength range outside a signal band, among noise lights generated in said optical amplifying circuit, to radiate the reflected noise light to the outside of a core of the optical fiber; a light receiver which receives the noise light reflected to be radiated to the outside of the core of the optical fiber by the optical reflection medium, to detect the power of the noise light; and a computation circuit which computes the total power of the noise lights generated in the optical amplifying circuit based on the detection result of the light receiver. Thus, it is possible to provide at a low cost an optical amplifier provided with a monitoring function capable of detecting high accurately, with a simple optical circuit configuration, the noise light power and the like generated when the signal light is amplified.

摘要翻译： 本发明的光放大器包括：放大信号光的光放大电路; 光反射介质，其设置在与光放大电路连接的光纤上，并且能够反射存在于信号频带外的预定波长范围内的噪声光，在所述光放大电路中产生的噪声光中， 将反射的噪声光反射到光纤的核心的外部; 光接收器，其通过光反射介质接收被辐射到光纤的芯的外部的噪声光，以检测噪声光的功率; 以及计算电路，其基于所述光接收器的检测结果来计算在所述光放大电路中产生的噪声光的总功率。 因此，可以以低成本提供具有能够以简单的光电路结构高精度检测的监视功能的光放大器，当信号光被放大时产生的噪声光功率等。

公开(公告)号：US07616848B2

公开(公告)日：2009-11-10

申请号：US11709729

申请日：2007-02-23

申请人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro ,  Etsuko Hayashi

发明人： Tomoaki Takeyama ,  Keiko Sasaki ,  Shinichirou Muro ,  Etsuko Hayashi

IPC分类号： G02B6/26

CPC分类号： H04J14/0221 ,  H04B10/506 ,  H04B10/564 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0227

摘要： In an optical transmission apparatus, optical power of each of wavelength contained in a wavelength multiplexing signal is measured, a measured value of the optical power of each wavelength is compared with a predetermined threshold value, a total value of the measured values of the optical power, which are equal to or larger than the threshold value, is calculated as a total value of signal beam power, and a total value of the measured values of the optical power, which are less then the threshold value, is calculated as a total value of ASE power. The number of the measured values of the optical power, which are equal to or larger than the threshold value, is calculated as a wavelength count of the signal beams contained in the wavelength multiplexing signal. A signal-to-ASE ratio is calculated from the total value of the signal beam power and the total value of the ASE power. The optical power of the wavelength multiplexing signal inputted to an optical amplifier is measured, and a target value of the automatic level control (ALC) is determined by use of the measured values of the wavelength count, the signal-to-ASE ratio and the optical power of the wavelength multiplexing signal in order to execute the ALC of the optical amplifier so that the optical power of each of the wavelengths in the wavelength multiplexing signal outputted from the optical amplifier, becomes constant.

摘要翻译： 在光传输装置中，测定包含在波长多路复用信号中的各波长的光功率，将各波长的光功率的测量值与预定阈值进行比较，光功率的测量值的总和 被计算为信号光束功率的总值，并且计算小于阈值的光功率的测量值的总值作为总值，其等于或大于阈值 的ASE电力。 计算出等于或大于阈值的光功率的测量值的数量作为包含在波长复用信号中的信号光束的波长计数。 从信号光束功率的总值和ASE功率的总值计算信号到ASE比。 测量输入到光放大器的波长复用信号的光功率，并且通过使用波长计数，信号与ASE比和测量值的测量值来确定自动电平控制（ALC）的目标值 为了执行光放大器的ALC，使得从光放大器输出的波长复用信号中的每个波长的光功率变得恒定，所以波长多路复用信号的光功率变得恒定。

公开(公告)号：US07529022B2

公开(公告)日：2009-05-05

申请号：US11039905

申请日：2005-01-24

申请人： Miki Onaka ,  Yasushi Sugaya ,  Etsuko Hayashi

发明人： Miki Onaka ,  Yasushi Sugaya ,  Etsuko Hayashi

IPC分类号： H01S3/30

CPC分类号： H04B10/2916 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094042 ,  H01S3/094046 ,  H01S3/094096 ,  H01S3/1301 ,  H01S3/1618 ,  H01S3/302 ,  H01S5/141

摘要： The present invention has an object to provide a Raman amplifier, a WDM optical communication system and a method of controlling the Raman amplification, capable of optimizing amplification characteristics in response to a change of operating conditions of the system so that transmission quality of the WDM signal light can be maintained in good. In order to achieve the above object, in the Raman amplifier according to the present invention, a plurality of pumping light generated by a pumping light generating section capable of varying a wavelength and power of the plurality of pumping light, are multiplexed by a pumping light multiplexing section that has wavelength variable transmission characteristics, and are supplied to an optical transmission path via a pumping light supplying section, and signal light being propagated through the optical transmission path is Raman amplified, wherein the Raman amplifier comprises a pumping light administrating section that controls supply conditions of the pumping light by adjusting operational setting of the pumping light generating section and the wavelength transmission characteristics of the pumping light multiplexing section in synchronization with the change with time of the system operational conditions.

摘要翻译： 本发明的目的是提供拉曼放大器，WDM光通信系统和控制拉曼放大的方法，其能够响应于系统的操作条件的变化来优化放大特性，使得WDM信号的传输质量 光能保持良好。 为了实现上述目的，在根据本发明的拉曼放大器中，由能够改变多个泵浦光的波长和功率的泵浦光产生部分产生的多个泵浦光由泵浦光 具有波长可变传输特性的复用部分，并且经由泵浦光供应部分被提供给光传输路径，并且通过光传输路径传播的信号光是拉曼放大的，其中拉曼放大器包括控制 通过随着系统操作条件随时间的变化同步地调节泵浦光发生部分的操作设置和泵浦光复用部分的波长传输特性来调节泵浦光的供给条件。

公开(公告)号：US07505197B2

公开(公告)日：2009-03-17

申请号：US10798267

申请日：2004-03-12

申请人： Yasushi Sugaya ,  Etsuko Hayashi ,  Masato Nishihara ,  Shinichirou Muro

发明人： Yasushi Sugaya ,  Etsuko Hayashi ,  Masato Nishihara ,  Shinichirou Muro

IPC分类号： H04B10/17 ,  H04B10/12

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：US20080239469A1

公开(公告)日：2008-10-02

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： H01S3/10

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：US20080007818A1

公开(公告)日：2008-01-10

申请号：US11896992

申请日：2007-09-07

申请人： Miki Onaki ,  Etsuko Hayashi

发明人： Miki Onaki ,  Etsuko Hayashi

IPC分类号： H01S3/00 ,  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。

公开(公告)号：US07042636B2

公开(公告)日：2006-05-09

申请号：US10925929

申请日：2004-08-26

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

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

IPC分类号： H01S3/00

CPC分类号： H04B10/2916 ,  H01S3/06754 ,  H01S3/1301 ,  H01S3/302 ,  H04B10/0777 ,  H04B10/07955 ,  H04B10/0797 ,  H04B2210/077

摘要： A Raman amplifier for amplifying a wavelength division multiplexed (WDM) light including signal lights wavelength division multiplexed together. The amplifier includes an optical amplifying medium and a controller. The optical amplifying medium uses Raman amplification to amplify the WDM light in accordance with multiplexed pump lights of different wavelengths traveling through the optical amplifying medium. The WDM light is amplified in a wavelength band divided into a plurality of individual wavelength bands. The controller controls power of each pump light based on a wavelength characteristic of gain generated in the optical amplifying medium in the individual wavelength bands.