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公开(公告)号：US20110164309A1
公开(公告)日：2011-07-07
申请号：US13042737
申请日：2011-03-08
IPC分类号： H01S3/02
CPC分类号： H04B10/2942 , H01S3/06758 , H01S3/1301 , H01S3/1305 , H04B10/2912 , H04B10/2941 , H04B2210/003
摘要： An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second optical amplifier receives the light amplified by the first optical amplifier, and amplifies the received light. When a level of the light received by the first optical amplifier changes by Δ, the controller controls a level of the light received by the second optical amplifier to change by approximately −Δ. In various embodiments, the controller causes the sum of the gains of the first and second optical amplifiers to be constant. In other embodiments, the optical amplification device includes first and second optical amplifier and a gain adjustor. The gain adjustor detects a deviation in gain of the first optical amplifier from a target gain, and adjusts the gain of the second optical amplifier to compensate for the detected deviation.
摘要翻译： 一种包括第一和第二光放大器的光放大装置和控制器。 第一光放大器接收光并放大所接收的光。 第二光放大器接收由第一光放大器放大的光，并放大所接收的光。 当由第一光学放大器接收的光的电平改变＆Dgr时，控制器控制由第二光放大器接收的光的水平变化大约为＆Dgr。 在各种实施例中，控制器使得第一和第二光学放大器的增益之和恒定。 在其他实施例中，光放大装置包括第一和第二光放大器和增益调节器。 增益调节器检测第一光放大器的增益偏离目标增益，并调整第二光放大器的增益以补偿检测到的偏差。
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公开(公告)号：US20100272445A1
公开(公告)日：2010-10-28
申请号：US12822797
申请日：2010-06-24
IPC分类号： H04B10/00
CPC分类号： H04B10/2942 , H01S3/06758 , H01S3/1301 , H01S3/1305 , H04B10/2912 , H04B10/2941 , H04B2210/003
摘要： An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second optical amplifier receives the light amplified by the first optical amplifier, and amplifies the received light. When a level of the light received by the first optical amplifier changes by Δ, the controller controls a level of the light received by the second optical amplifier to change by approximately −Δ. In various embodiments, the controller causes the sum of the gains of the first and second optical amplifiers to be constant. In other embodiments, the optical amplification device includes first and second optical amplifier and a gain adjustor. The gain adjustor detects a deviation in gain of the first optical amplifier from a target gain, and adjusts the gain of the second optical amplifier to compensate for the detected deviation.
摘要翻译： 一种包括第一和第二光放大器的光放大装置和控制器。 第一光放大器接收光并放大所接收的光。 第二光放大器接收由第一光放大器放大的光，并放大所接收的光。 当由第一光学放大器接收的光的电平改变＆Dgr时，控制器控制由第二光放大器接收的光的水平变化大约为＆Dgr。 在各种实施例中，控制器使得第一和第二光学放大器的增益之和恒定。 在其他实施例中，光放大装置包括第一和第二光放大器和增益调节器。 增益调节器检测第一光放大器的增益偏离目标增益，并调整第二光放大器的增益以补偿检测到的偏差。
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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
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。
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公开(公告)号：US20070041084A1
公开(公告)日：2007-02-22
申请号：US11586604
申请日：2006-10-26
CPC分类号： H04B10/2941 , H01S3/0064 , H01S3/06708 , H01S3/0672 , H01S3/06729 , H01S3/06758 , H01S3/0677 , H01S3/094003 , H01S3/094023 , H01S3/0941 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S2301/02
摘要： The present invention has an object to provide an optical amplifier capable of realizing a good response characteristic in a wide frequency band, even when a population inversion state is formed by a pumping light supplied to an optical amplification medium and an ASE light generated in the optical amplification medium. To this end, in the optical amplifier according to the present invention, a delayed phase matching fiber in which a first fiber whose response speed is relatively low is arranged on the input side and a second fiber whose response speed is relatively high is arranged on the output side, is used as the optical amplification medium doped with a rare-earth element.
摘要翻译： 本发明的目的是提供一种能够在宽频带中实现良好的响应特性的光放大器，即使当通过提供给光放大介质的泵浦光和在光学放大器中产生的ASE光形成群体反转状态时 扩增介质。 为此，在根据本发明的光放大器中，延迟相位匹配光纤，其中响应速度相对较低的第一光纤被布置在输入侧，并且响应速度相对较高的第二光纤被布置在 输出侧用作掺杂有稀土元素的光放大介质。
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公开(公告)号：US20060291036A1
公开(公告)日：2006-12-28
申请号：US11348334
申请日：2006-02-07
申请人： Norifumi Shukunami , Shinya Inagaki
发明人： Norifumi Shukunami , Shinya Inagaki
CPC分类号： H01S3/06754 , H01S3/0064 , H01S3/06725 , H01S3/06729 , H01S3/06758 , H01S3/094011 , H01S3/09415 , H01S2301/04 , H04B10/291 , H04B2210/003 , H04B2210/256
摘要： An optical amplifier that improves the quality of WDM transmission by reducing four-wave mixing. An optical fiber has positive chromatic dispersion in a signal band and is used as an optical amplification medium for amplifying a wavelength division multiplex signal. An excitation section inputs excitation light to the optical fiber. In order to actualize mismatching of phases of optical signals with different wavelengths to be propagated, the optical fiber has positive chromatic dispersion in a signal band by which there is a great difference between a signal frequency, being a frequency of a signal to be amplified, and a zero-dispersion frequency, being a frequency at which chromatic dispersion is zero. As a result, the optical fiber functions as an optical amplification medium in which four-wave mixing is suppressed.
摘要翻译： 一种通过减少四波混频来提高WDM传输质量的光放大器。 光纤在信号频带中具有正色散，并且用作用于放大波分复用信号的光放大介质。 激励部分向光纤输入激发光。 为了实现要传播的具有不同波长的光信号的相位的不匹配，光纤在信号频带中具有正色散，在信号频带中，作为要放大的信号的频率的信号频率之间存在很大的差异， 和零色散频率，其为色散为零的频率。 结果，光纤用作抑制四波混频的光放大介质。
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公开(公告)号：US07136219B2
公开(公告)日：2006-11-14
申请号：US11094720
申请日：2005-03-31
IPC分类号： H01S3/00
CPC分类号： H04B10/2941 , H01S3/0064 , H01S3/06708 , H01S3/0672 , H01S3/06729 , H01S3/06758 , H01S3/0677 , H01S3/094003 , H01S3/094023 , H01S3/0941 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S2301/02
摘要： The present invention has an object to provide an optical amplifier capable of realizing a good response characteristic in a wide frequency band, even when a population inversion state is formed by a pumping light supplied to an optical amplification medium and an ASE light generated in the optical amplification medium. To this end, in the optical amplifier according to the present invention, a delayed phase matching fiber in which a first fiber whose response speed is relatively low is arranged on the input side and a second fiber whose response speed is relatively high is arranged on the output side, is used as the optical amplification medium doped with a rare-earth element.
摘要翻译： 本发明的目的是提供一种能够在宽频带中实现良好的响应特性的光放大器，即使当通过提供给光放大介质的泵浦光和在光学放大器中产生的ASE光形成群体反转状态时 扩增介质。 为此，在根据本发明的光放大器中，延迟相位匹配光纤，其中响应速度相对较低的第一光纤被布置在输入侧，并且响应速度相对较高的第二光纤被布置在 输出侧用作掺杂有稀土元素的光放大介质。
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公开(公告)号：US07061666B2
公开(公告)日：2006-06-13
申请号：US10414237
申请日：2003-04-16
IPC分类号： H01S3/00
CPC分类号： H04B10/2942 , H01S3/06758 , H01S3/1301 , H01S3/1305 , H04B10/2912 , H04B10/2941 , H04B2210/003
摘要： An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second optical amplifier receives the light amplified by the first optical amplifier, and amplifies the received light. When a level of the light received by the first optical amplifier changes by Δ, the controller controls a level of the light received by the second optical amplifier to change by approximately −Δ. In various embodiments, the controller causes the sum of the gains of the first and second optical amplifiers to be constant. In other embodiments, the optical amplification device includes first and second optical amplifier and a gain adjustor. The gain adjustor detects a deviation in gain of the first optical amplifier from a target gain, and adjusts the gain of the second optical amplifier to compensate for the detected deviation.
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18.发明授权Optical amplification method and device usable with bands other than the C-band 有权光学放大方法和可用于C波段以外的频带的装置公开(公告)号：US06633429B2
公开(公告)日：2003-10-14
申请号：US09790507
申请日：2001-02-23
申请人： Susumu Kinoshita , Shinya Inagaki
发明人： Susumu Kinoshita , Shinya Inagaki
IPC分类号： H01S300
CPC分类号： H01S3/06754 , H01S3/10023 , H01S3/1301 , H01S2301/04
摘要： An optical amplifier includes an optical amplification medium, an excitation source to stimulate the amplification medium to output at least one wavelength gain peak, and a gain equalizer to equalize the output of the amplification medium such that gain is produced at wavelengths other than the wavelength gain peak. The gain equalizer may attenuate gain at the peak wavelength. The gain equalizer may equalize the output of the amplification medium such that gain is produced at wavelengths less than the wavelength gain peak. The optical amplifier may include both a gain equalizer and automatic level control circuitry to respectively maintain substantially uniform gain at wavelengths within an optical signal band and maintain constant output power.
摘要翻译： 光放大器包括光放大介质，用于激励放大介质以输出至少一个波长增益峰值的激励源和增益均衡器，以均衡放大介质的输出，使得增益在波长增益以外的波长处产生 峰。 增益均衡器可以衰减峰值波长处的增益。 增益均衡器可以均衡放大介质的输出，使得在小于波长增益峰值的波长处产生增益。 光放大器可以包括增益均衡器和自动电平控制电路，以分别在光信号频带内的波长处保持基本均匀的增益，并保持恒定的输出功率。
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19.发明授权Optical fiber amplifier using optical fiber having a portion which suppresses nonlinear optical phenomena 有权使用具有抑制非线性光学现象的部分的光纤的光纤放大器公开(公告)号：US06266180B1
公开(公告)日：2001-07-24
申请号：US09339188
申请日：1999-06-24
申请人： Shinya Inagaki , Keiko Takeda , Kaoru Moriya , Hiroshi Onaka
发明人： Shinya Inagaki , Keiko Takeda , Kaoru Moriya , Hiroshi Onaka
IPC分类号： H01S310
CPC分类号： H01S3/06754 , H01S3/06716 , H01S3/06745 , H01S3/06758 , H01S3/1603
摘要： An optical amplifier which suppresses the occurrence of a nonlinear optical phenomena, such as four-wave mixing. The optical amplifier includes an optical fiber doped with a rare earth element, and a light source providing excitation light to the fiber so that a wavelength division multiplexed (WDM) light is amplified as the WDM light travels through the fiber from a first point to a second point along the fiber. A third point exists along the fiber between the first and second points at which a power of the WDM light substantially reaches a level producing a nonlinear optical phenomenal. A first portion of the fiber is between the first point and the third point, and a second portion of the fiber is between the third point and the second point. The second portion suppresses the occurrence of the nonlinear optical phenomena as compared to the first portion. The second portion can have various different constructions to provide the required suppression effect.
摘要翻译： 抑制诸如四波混频的非线性光学现象的发生的光放大器。 光放大器包括掺杂有稀土元素的光纤和向光纤提供激发光的光源，使得当WDM光从第一点传播到第一点时，波分复用（WDM）光被放大 第二点沿着纤维。 在第一和第二点之间的光纤上存在第三点，在该点处，WDM光的功率基本上达到产生非线性光学现象的电平。 纤维的第一部分在第一点和第三点之间，纤维的第二部分在第三点和第二点之间。 与第一部分相比，第二部分抑制非线性光学现象的发生。 第二部分可以具有各种不同的结构以提供所需的抑制效果。
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公开(公告)号：US6134046A
公开(公告)日：2000-10-17
申请号：US39622
申请日：1998-03-16
申请人： Norifumi Shukunami , Shinya Inagaki , Miki Takeda
发明人： Norifumi Shukunami , Shinya Inagaki , Miki Takeda
CPC分类号： H01S3/10023 , H01S2301/02 , H01S3/06716 , H01S3/06754
摘要： An optical amplifying fiber including a core doped with a rare earth element and having a first refractive index, a cladding surrounding the core and having a second refractive index smaller than the first refractive index, and a fiber grating formed in the core for transmitting signal light having a first wavelength and pump light having a second wavelength and removing amplified spontaneous emission. The fiber grating is preferably positioned upstream of a middle point of the entire length of the optical amplifying fiber in terms of a propagation direction of signal light.
摘要翻译： 一种光学放大光纤，包括掺杂有稀土元素并具有第一折射率的芯，围绕芯并且具有小于第一折射率的第二折射率的包层以及形成在芯中的用于传输信号光的光纤光栅 具有第一波长和具有第二波长的泵浦光并且去除放大的自发发射。 就信号光的传播方向而言，光纤光栅优选地位于光放大光纤的整个长度的中点的上游。
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