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公开(公告)号：US5532870A
公开(公告)日：1996-07-02
申请号：US346256
申请日：1994-11-23
IPC分类号： G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/17 , H04J14/02 , H01S3/00 , H01S3/30
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
摘要翻译： 光纤放大器包括用于接收信号光和激发光的复合光纤，放大信号光并发射放大的信号光，包括至少两种串联耦合的光纤，每个光纤具有选自以下的至少两种 稀土掺杂的玻璃组合物，以及用于产生激发光并将其提供给复合光纤的激励装置。 然后，在波分多路复用传输或光模拟传输中降低各种波长范围的增益的波长依赖性并且保持放大的能量效率的光纤放大器使波长为增益峰值的光纤放大器 提供根据各种输入光的强度的预定值，以及包括该光纤放大器的光放大器中继器。
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公开(公告)号：US5640269A
公开(公告)日：1997-06-17
申请号：US622149
申请日：1996-03-27
IPC分类号： G02B6/00 , G02B6/02 , H01S3/06 , H01S3/067 , H01S3/094 , H01S3/0941 , H01S3/10 , H01S3/16 , H01S3/17 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： An optical fiber amplifier comprises a composite optical fiber for receiving signal light and excitation light, amplifying the signal light and emitting the amplified signal light, comprising at least two kinds of optical fibers serially coupled each having a glass composition selected from at least two kinds of rare-earth-doped glass compositions, and excitation means for generating excitation light and supplying it to the composite optical fiber. Then, an optical fiber amplifier which reduces the wavelength dependency of gain in various wavelength ranges in wavelength division multiplexing transmission or in optical analog transmission, and which maintains an energy efficiency for amplification, an optical fiber amplifier which makes a wavelength at a gain peak to a predetermined one in accordance with intensities of various input lights, and an optical amplifier repeater comprising this optical fiber amplifier are provided.
摘要翻译： 光纤放大器包括用于接收信号光和激发光的复合光纤，放大信号光并发射放大的信号光，包括至少两种串联耦合的光纤，每个光纤具有选自以下的至少两种 稀土掺杂的玻璃组合物，以及用于产生激发光并将其提供给复合光纤的激励装置。 然后，在波分多路复用传输或光模拟传输中降低各种波长范围的增益的波长依赖性并且保持放大的能量效率的光纤放大器使波长为增益峰值的光纤放大器 提供根据各种输入光的强度的预定值，以及包括该光纤放大器的光放大器中继器。
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3.发明授权
公开(公告)号：US5430822A
公开(公告)日：1995-07-04
申请号：US127338
申请日：1993-09-28
IPC分类号： G02B6/00 , G02B6/02 , G02B6/34 , H04B10/25 , H04B10/2507 , H04B10/2525 , G02B6/26
CPC分类号： G02B6/29377 , H04B10/2525 , G02B6/29376 , H04B2210/252
摘要： An optical communication system that compensate for the dispersion of an optical fiber serving as a transmission path is provided. In its simplest form a dispersion compensating fiber having a sufficient length to compensate for the chromatic dispersion of the optical fiber is divided into portions, each portion having a length selected so as to maintain a linear characteristic of a relative intensity noise of the dispersion compensating fiber, and the divided portions of the dispersion compensating fiber are inserted in the path of the optical fiber while they are optically separated.
摘要翻译： 提供补偿作为传输路径的光纤的色散的光通信系统。 在其最简单的形式中，具有足够长度以补偿光纤的色散的色散补偿光纤被分成部分，每个部分具有选择的长度，以便保持色散补偿光纤的相对强度噪声的线性特性 并且色散补偿光纤的分割部分在光学分离的同时插入光纤的路径中。
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公开(公告)号：US5721635A
公开(公告)日：1998-02-24
申请号：US562631
申请日：1995-11-24
CPC分类号： H04B10/2912 , H01S3/06754 , H04B10/291 , H04B10/2935 , H04B10/294 , H04J14/0221 , H01S2301/04 , H01S3/1608 , H04B2210/003
摘要： This method comprises the steps of: introducing light signals having different wavelengths into an optical amplifier, wherein the optical amplifier has a plurality of fibers with rare earth element doped therein and P is selectively doped in said fibers; and introducing excitation light into the fibers, the excitation light being able to excite the rare earth element. At least one of the fibers has Al therein and the relationship between the Al and P concentration satisfies following expression: C(P)/C(Al)>2, where, C(P) is P concentration in the fiber, and C(Al) is Al concentration in the fiber.
摘要翻译： 该方法包括以下步骤：将具有不同波长的光信号引入到光放大器中，其中光放大器具有掺杂有稀土元素的多个光纤，并且P选择性地掺杂在所述光纤中; 并将激发光引入到纤维中，激发光能够激发稀土元素。 至少其中一根纤维具有Al，Al和P的浓度之间的关系满足下列表达式：C（P）/ C（Al）> 2，其中C（P）是纤维中的P浓度，C（ Al）是纤维中的Al浓度。
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5.发明授权
公开(公告)号：US5680491A
公开(公告)日：1997-10-21
申请号：US657560
申请日：1996-06-04
IPC分类号： G02B6/00 , G02B6/02 , G02B6/34 , H04B10/25 , H04B10/2507 , H04B10/2525 , G02B6/28
CPC分类号： G02B6/29377 , H04B10/2525 , G02B6/29376 , H04B2210/252
摘要： An optical communication system that compensate for the dispersion of an optical fiber serving as a transmission path is provided. In its simplest form, a dispersion compensating fiber having a sufficient length to compensate for the chromatic dispersion of the optical fiber is divided into portions, each portion having a length selected so as to maintain a linear characteristic of a relative intensity noise of the dispersion compensating fiber, and the divided portions of the dispersion compensating fiber are inserted in the path of the optical fiber while they are optically separated.
摘要翻译： 提供补偿作为传输路径的光纤的色散的光通信系统。 在其最简单的形式中，具有足够长度以补偿光纤的色散的色散补偿光纤被分成多个部分，每个部分具有选择的长度，以保持色散补偿的相对强度噪声的线性特性 光纤，并且色散补偿光纤的分割部分在光学分离的同时插入光纤的路径中。
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公开(公告)号：US06952309B1
公开(公告)日：2005-10-04
申请号：US09667576
申请日：2000-09-22
申请人： Tetsufumi Tsuzaki , Masayuki Nishimura , Masayuki Shigematsu , Hitoshi Hatayama , Eisuke Sasaoka
发明人： Tetsufumi Tsuzaki , Masayuki Nishimura , Masayuki Shigematsu , Hitoshi Hatayama , Eisuke Sasaoka
CPC分类号： H01S3/06758 , H01S3/06754 , H01S3/10007 , H01S3/10023 , H01S3/1301 , H01S2301/04 , H04B10/2941 , H04B10/2942 , H04B10/296
摘要： A optical filter has a loss spectrum whose gradient dL/dλ of a loss L (dB) with respect to the wavelength λ (nm) is variable in the wavelength band of multiplexed signal light. A control circuit detects each power of signal light components demultiplexed by an optical coupler and controls the power of optical pumping light to be supplied to an optical amplification section from an optical pumping light sources such that the power of output signal light has a predetermined target value. The control circuit also controls the gradient dL/dλ of the optical filter on the basis of powers of the signal light components.
摘要翻译： 滤光器具有损耗谱，其相对于波长λ（nm）的损耗L（dB）的梯度dL /dlλ在复用信号光的波长带中是可变的。 控制电路检测由光耦合器解复用的信号光分量的每个功率，并且控制从光泵浦光源提供给光放大部分的光泵浦光的功率，使得输出信号光的功率具有预定的目标值 。 控制电路还基于信号光分量的功率来控制滤光器的梯度dL / dl。
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公开(公告)号：US07330302B2
公开(公告)日：2008-02-12
申请号：US10607380
申请日：2003-06-27
IPC分类号： H01S3/00
CPC分类号： H04B10/2525 , H04B10/2916 , H04B2210/003
摘要： This invention provides an optical transmission system which allows to perform high-quality transmission of each of a plurality of signal channels multiplexed. In the optical transmission system, signal light in which a plurality of signal channels with an optical frequency spacing of 400 GHz or more but 12.5 THz or less is transmitted from an optical transmitter to a Raman amplifier through an optical fiber transmission line. In the Raman amplifier, pumping light from a pumping light source unit is supplied to an optical fiber through an optical coupler. The multiplexed signal light inputted to the Raman amplifier arrives at the optical fiber through an optical isolator and optical coupler, and Raman-amplified by the optical fiber. The Raman-amplified multiplexed signal light is outputted from the Raman amplifier through an optical coupler and optical isolator.
摘要翻译： 本发明提供一种光传输系统，其允许多路复用的多个信号信道中的每一个的高质量传输。 在光传输系统中，其中通过光纤传输线路将光频率为400GHz以上且12.5THz以下的多个信号信道从光发射机发射到拉曼放大器的信号光。 在拉曼放大器中，来自泵浦光源单元的泵浦光通过光耦合器提供给光纤。 输入到拉曼放大器的复用信号光通过光隔离器和光耦合器到达光纤，并由光纤拉曼放大。 拉曼放大的复用信号光通过光耦合器和光隔离器从拉曼放大器输出。
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8.发明授权WDM transmission repeater, WDM transmission system and WDM transmission method 失效WDM传输中继器，WDM传输系统和WDM传输方式公开(公告)号：US06512613B1
公开(公告)日：2003-01-28
申请号：US09380503
申请日：1999-09-03
IPC分类号： H04J1402
CPC分类号： H04J14/0206 , H04B10/294 , H04J14/0213
摘要： The present invention relates to a WDM transmission system and the like suitable for optical communications between local stations having a relatively short repeater interval. In particular, the WDM transmission repeater employed in the WDM transmission system demultiplexes a plurality of signal lights propagating through a transmission line into first and second groups, takes out the second group, comprises a multiplexer for sending into the transmission line a new WDM signal group in which the first group thus demultiplexed and a third group of signal lights different from those of the first group are multiplexed, and has a special structure for reducing the influence of the not-demultiplexed crosstalk components within the second group upon the optical communications.
摘要翻译： 本发明涉及适合于具有相对短的中继器间隔的本地站之间的光通信的WDM传输系统等。 特别地，在WDM传输系统中采用的WDM传输中继器将通过传输线传播的多个信号光分离成第一和第二组，取出第二组，包括一个多路复用器，用于向传输线发送新的WDM信号组 其中如此解复用的第一组和与第一组不同的第三组信号光被复用，并且具有用于在光通信时减少第二组内的未解复用的串扰分量对第一组的影响的特殊结构。
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公开(公告)号：US5509098A
公开(公告)日：1996-04-16
申请号：US153055
申请日：1993-11-17
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H04B10/07 , H04B10/25 , H04B10/2557 , H04B10/2569 , H04B10/272 , H04B10/54 , H04B10/58 , G02B6/16 , H04B3/52
CPC分类号： H04B10/2569
摘要： In this invention, an optical analog signal obtained such that light having a wavelength .lambda.1 is intensity-modulated or frequency-modulated with a modulation index m per channel and a chirping amount .lambda.s for 100% modulation is transmitted. An optical element connected to an outlet of a transmission medium having a polarization mode dispersion .tau. with respect to an optical signal is selected such that when the optical signal output from the optical element requires a predetermined composite second-order distortion C, a transmittance T.sub.0 of the optical element for the light having the wavelength .lambda.1 and a polarization dependency A of an insertion loss satisfy the following condition:20 log.sub.10 {(2.pi.c/.lambda.1.sup.2).multidot.n.multidot.(A/T.sub.0).multidot..tau..multidot.m.multidot..lambda.s}.ltoreq.C(where n is a number of beats occurring in the optical signal and c is the light velocity).
摘要翻译： 在本发明中，发送光学模拟信号，使得具有波长λ1的光被强制调制或频率调制，每通道调制指数m和100％调制的啁啾量λs。 选择连接到具有相对于光信号的偏振模色散T r的传输介质的出口的光学元件，使得当从光学元件输出的光信号需要预定的复合二阶失真C时，透射率T0 具有波长λ1的光和插入损耗的偏振依赖性A的光学元件满足以下条件：20log10 {（2πc/λ12）×nx（A / T0）×τxmxλs} = C（其中n是在光信号中发生的节拍数，c是光速）。
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10.发明授权Optical phase conjugator, optical transmission system using the same, and optical phase conjugation method 失效光相位共轭器，使用其的光传输系统和光相位共轭方法
公开(公告)号：US5694239A
公开(公告)日：1997-12-02
申请号：US498985
申请日：1995-07-06
CPC分类号： H04B10/2531 , G02F1/3538 , H01S3/06754
摘要： An optical phase conjugator includes an optical nonlinear medium for receiving original signal light and pumping light, and generating and outputting phase-conjugate light by a nonlinear optical effect. The optical nonlinear medium contains an element which can be activated upon irradiation of activation light and has an amplification function with respect to at least the pumping light. The optical phase conjugator comprises a first optical coupler for coupling the original signal light and the pumping light and then inputting the coupled light into the medium, and a second optical coupler for inputting the activation light into the medium. An improvement in phase-conjugate light generating efficiency is attained, and phase-conjugate light having a sufficiently high intensity can be obtained by the optical phase conjugator with a simple, compact arrangement.
摘要翻译： 光相位共轭器包括用于接收原始信号光和泵浦光的光学非线性介质，并且通过非线性光学效应产生和输出相位共轭光。 光学非线性介质包含可以在激活光照射时被激活的元件，并且至少相对于泵浦光具有放大功能。 光相位共轭器包括用于耦合原始信号光和泵浦光，然后将耦合光输入介质的第一光耦合器，以及用于将激活光输入介质的第二光耦合器。 实现了相位共轭光产生效率的提高，并且通过光学相位共轭器以简单且紧凑的布置可以获得具有足够高强度的相位共轭光。
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