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公开(公告)号：US20070274725A1
公开(公告)日：2007-11-29
申请号：US11709729
申请日：2007-02-23
IPC分类号： H04J14/00
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。
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62.发明授权公开(公告)号：US07119950B2
公开(公告)日：2006-10-10
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.
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公开(公告)号：US07095553B2
公开(公告)日：2006-08-22
申请号：US10895315
申请日：2004-07-21
申请人： Etsuko Hayashi
发明人： Etsuko Hayashi
IPC分类号： H01S3/00
CPC分类号： H01S3/302 , H01S3/094096 , H01S3/10069 , H01S3/1301 , H01S3/2375 , H04B10/2916
摘要： There is provided an optical amplifier comprising a Raman amplifying section, a rare earth element doped fiber amplifying section to be disposed in the case where the number of operating channels exceeds the number of allowable channels A, and a control section. And the control section controls the wavelength of pumping light of the Raman amplifying section such that the signal light of the entire band is able to be amplified, in the case where the number of operating channels is equal to that of allowable channels A or less, and whereas the control section controls the wavelength of pumping light of the Raman amplifying section such that the signal light of the band located out of the amplifying band of the rare earth element doped fiber amplifier is able to be amplified, in the case where the number of operating channels becomes greater than the number of allowable channels A.
摘要翻译： 提供了一种光放大器，包括拉曼放大部分，稀土元素掺杂光纤放大部分，其中操作通道的数量超过允许通道数目A的情况，以及控制部分。 并且，在操作通道的数量等于可允许通道A或更小的情况下，控制部分控制拉曼放大部分的泵浦光的波长，使得整个频带的信号光能够被放大， 而控制部分控制拉曼放大部分的泵浦光的波长，使得位于稀土元素掺杂光纤放大器的放大频带之外的频带的信号光能够被放大，在数量 的操作通道变得大于允许通道数量A.
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64.发明授权公开(公告)号：US08116626B2
公开(公告)日：2012-02-14
申请号：US12453060
申请日：2009-04-28
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。
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公开(公告)号：US07616848B2
公开(公告)日：2009-11-10
申请号：US11709729
申请日：2007-02-23
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。
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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
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。
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公开(公告)号：US20050219681A1
公开(公告)日：2005-10-06
申请号：US10895315
申请日：2004-07-21
申请人： Etsuko Hayashi
发明人： Etsuko Hayashi
IPC分类号： H01S3/06 , H01S3/067 , H01S3/094 , H01S3/102 , H01S3/13 , H01S3/131 , H01S3/17 , H01S3/23 , H01S3/30 , H01S3/00
CPC分类号： H01S3/302 , H01S3/094096 , H01S3/10069 , H01S3/1301 , H01S3/2375 , H04B10/2916
摘要： There is provided an optical amplifier comprising a Raman amplifying section, a rare earth element doped fiber amplifying section to be disposed in the case where the number of operating channels exceeds the number of allowable channels A, and a control section. And the control section controls the wavelength of pumping light of the Raman amplifying section such that the signal light of the entire band is able to be amplified, in the case where the number of operating channels is equal to that of allowable channels A or less, and whereas the control section controls the wavelength of pumping light of the Raman amplifying section such that the signal light of the band located out of the amplifying band of the rare earth element doped fiber amplifier is able to be amplified, in the case where the number of operating channels becomes greater than the number of allowable channels A.
摘要翻译： 提供了一种光放大器，包括拉曼放大部分，稀土元素掺杂光纤放大部分，其中操作通道的数量超过允许通道数目A的情况，以及控制部分。 并且，在操作通道的数量等于可允许通道A或更小的情况下，控制部分控制拉曼放大部分的泵浦光的波长，使得整个频带的信号光能够被放大， 而控制部分控制拉曼放大部分的泵浦光的波长，使得位于稀土元素掺杂光纤放大器的放大频带之外的频带的信号光能够被放大，在数量 的操作通道变得大于允许通道数量A.
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公开(公告)号：US5856882A
公开(公告)日：1999-01-05
申请号：US600501
申请日：1996-02-13
CPC分类号： C03C4/0071 , C03C13/041 , H01S3/06708
摘要： Disclosed are an optical fiber comprising a core and a cladding wherein the core is composed of a In-Ga-Cd-Pb halide glass and the clad composed of a halide glass possesses a refractive index of 1.515 or less, which has a large specific refractive index difference (.DELTA.n) and a large numerical aperture, and such an optical fiber as mentioned above wherein the core contains one or more activating ions as well as an optical fiber amplifier comprising a pumping source, a laser glass fiber and a means for introducing pumping light and signal light into the above laser glass fiber, wherein the laser glass fiber is the optical fiber of the present invention mentioned above.
摘要翻译： 公开了一种包括芯和包层的光纤，其中芯由In-Ga-Cd-Pb卤化物玻璃组成，并且由卤化物玻璃组成的包层具有1.515或更小的折射率，其具有大的比折射率 折射率差（DELTA n）和大数值孔径，以及如上所述的这种光纤，其中芯包含一个或多个激活离子，以及包括泵浦源，激光玻璃纤维和引入的装置的光纤放大器 将光和信号光泵送到上述激光玻璃纤维中，其中激光玻璃纤维是上述本发明的光纤。
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69.发明申请公开(公告)号：US20090297143A1
公开(公告)日：2009-12-03
申请号：US12453060
申请日：2009-04-28
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。
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70.发明授权公开(公告)号：US07551347B2
公开(公告)日：2009-06-23
申请号：US11979370
申请日：2007-11-01
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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