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1. 发明授权

US06483632B1 Multistage optical amplifier with gain flattening 有权
标题翻译：多级光放大器增益变平
公开(公告)号：US06483632B1
公开(公告)日：2002-11-19
申请号：US09214248
申请日：1999-09-20
申请人： Nigel Edward Jolley , Fiona Davis , Richard Edward Epworth
发明人： Nigel Edward Jolley , Fiona Davis , Richard Edward Epworth
IPC分类号： H04B1012
CPC分类号： H04B10/2912 , H01S3/10023 , H04B10/291 , H04B10/2941 , H04B2210/003
摘要： A variable gain optical amplifier, in which homogeneous gain broadening is dominant, has first and second fixed gain rare-earth doped optical waveguide amplifiers (21, 23) optically in series together with an intervening variable attenuation optical attenuator (22). This arrangement circumvents the problem of gain tilt encountered when operating such amplifiers under variable gain conditions. An alternative form of the module has variable gain waveguide amplifiers, but these are co-regulated so that the aggregate of their gain at a wavelength within the gain spectrum is maintained constant. A further alternative form of module is employed in a concatenation of such modules. In such a concatenation, the gain of individual modules is allowed to vary, but the aggregate of the gain, at wavelength within the gain spectrum, of all the waveguide amplifiers of all the modules of the concatenation is maintained constant.
摘要翻译：其中均匀增益增宽是主要的可变增益光放大器具有与中间可变衰减光衰减器（22）一起光学地串联的第一和第二固定增益稀土掺杂光波导放大器（21,23）。这种布置避免了在可变增益条件下操作这样的放大器时遇到的增益倾斜的问题。模块的替代形式具有可变增益波导放大器，但是这些放大器是共同调节的，使得其在增益谱内的波长处的增益的总和保持恒定。在这种模块的级联中采用另一种替代形式的模块。在这样的级联中，允许单个模块的增益改变，但是在级联的所有模块的所有波导放大器的增益谱波长内的增益的总和保持恒定。

2. 发明授权

US06894829B2 Optical amplifier modules 有权
标题翻译：光放大器模块
公开(公告)号：US06894829B2
公开(公告)日：2005-05-17
申请号：US10209625
申请日：2002-07-30
申请人： Nigel Edward Jolley , Fiona Davis , Richard Edward Epworth
发明人： Nigel Edward Jolley , Fiona Davis , Richard Edward Epworth
IPC分类号： H04J14/00 , H01S3/10 , H04B10/291 , H04B10/294 , H04J14/02 , H01S3/00
CPC分类号： H04B10/2912 , H01S3/10023 , H04B10/291 , H04B10/2941 , H04B2210/003
摘要： A variable gain optical amplifier, in which homogeneous gain broadening is dominant, has first and second fixed gain rare-earth doped optical waveguide amplifiers (21, 23) optically in series together with an intervening variable attenuation optical attenuator (22). This arrangement circumvents the problem of gain tilt encountered when operating such amplifiers under variable gain conditions. An alternative form of the module has variable gain waveguide amplifiers, but these are co-regulated so that the aggregate of their gain at a wavelength within the gain spectrum is maintained constant. A further alternative form of module is employed in a concatenation of such modules. In such a concatenation, the gain of individual modules is allowed to vary, but the aggregate of the gain, at a wavelength within the gain spectrum, of all the waveguide amplifiers of all the modules of the concatenation is maintained constant.
摘要翻译：其中均匀增益增宽是主要的可变增益光放大器具有与中间可变衰减光衰减器（22）一起光学地串联的第一和第二固定增益稀土掺杂光波导放大器（21,23）。这种布置避免了在可变增益条件下操作这样的放大器时遇到的增益倾斜的问题。模块的替代形式具有可变增益波导放大器，但是这些放大器是共同调节的，使得其在增益谱内的波长处的增益的总和保持恒定。在这种模块的级联中采用另一种替代形式的模块。在这样的级联中，允许单个模块的增益改变，但是在级联的所有模块的所有波导放大器的增益谱波长内的增益的总和保持恒定。

3. 发明授权

US5966481A Optically pumped optical waveguide amplifier 失效
标题翻译：光泵浦光波导放大器
公开(公告)号：US5966481A
公开(公告)日：1999-10-12
申请号：US996865
申请日：1997-12-23
申请人： Nigel Edward Jolley , Fiona Davis
发明人： Nigel Edward Jolley , Fiona Davis
IPC分类号： H01S3/063 , H01S3/067 , H01S3/10 , H04B10/17 , G02B6/26
CPC分类号： H04B10/2941 , H01S3/063 , H01S3/10023 , H04B10/2912 , H01S2301/06 , H01S3/0675
摘要： An optically amplifying waveguide guides both the LP.sub.01 and the LP.sub.02 mode. Its erbium distribution profile is preferentially matched with the modal field distribution of the LP.sub.02 mode. The waveguide is provided with long period perturbations of a pitch and strength that resonantly couples signal power of different wavelengths from propagation in the LP.sub.01 mode to propagation in the LP.sub.02 mode and back again to propagation in the LP.sub.01 mode whereby the longitudinal distribution of gain along the waveguide at one wavelength is longitudinally displaced with respect to that at least one other wavelength.
摘要翻译：光放大波导引导LP01和LP02模式。其铒分布曲线优先与LP02模式的模态场分布匹配。波导具有间隔和强度的长周期扰动，其将不同波长的信号功率从LP01模式中的传播共振耦合到LP02模式中的传播，并且再次返回到LP01模式中的传播，由此增益沿纵向分布在一个波长处的波导相对于至少一个其它波长纵向移位。

4. 发明授权

US09100120B1 Methods and apparatus for determining a path in a communications network 有权
标题翻译：用于确定通信网络中的路径的方法和装置
公开(公告)号：US09100120B1
公开(公告)日：2015-08-04
申请号：US10675760
申请日：2003-09-30
申请人： Robert Friskney , Fiona Davis , Nigel Baker , Christopher Phillips , Song Dong
发明人： Robert Friskney , Fiona Davis , Nigel Baker , Christopher Phillips , Song Dong
IPC分类号： H04B10/25
CPC分类号： H04Q11/0066 , H04B10/25 , H04J14/0257 , H04J14/0271 , H04J14/0295 , H04L45/121 , H04L45/124 , H04L45/127 , H04L45/30 , H04L45/308 , H04L45/70 , H04Q2011/0073 , H04Q2011/0086
摘要： Typically paths are provisioned in a network with a margin which allows for component variations and failures in the network and so on. By providing more information about the requirements of the link in a path request, it is possible to more efficiently calculate a route for the path through the network. The efficiency gain allows greater network utilization which in turn saves costs for the network service provider.
摘要翻译：通常，路径在网络中配置有一个边距，允许网络中的组件变化和故障等等。通过提供关于路径请求中的链路的需求的更多信息，可以更有效地计算通过网络的路径的路由。效率增益允许更大的网络利用率，从而节省网络服务提供商的成本。

5. 发明授权

US6144486A Pump wavelength tuning of optical amplifiers and use of same in wavelength division multiplexed systems 失效
标题翻译：泵浦波长调谐光放大器及其在波分复用系统中的应用
公开(公告)号：US6144486A
公开(公告)日：2000-11-07
申请号：US16184
申请日：1998-01-30
申请人： Kevin W. Bennett , Fiona Davis , Richard A. Habel , Paul A. Jakobson , Nigel E. Jolley , Robert W. Keys , Kim Byron Roberts , Mark A. Newhouse , Michael J. Yadlowsky
发明人： Kevin W. Bennett , Fiona Davis , Richard A. Habel , Paul A. Jakobson , Nigel E. Jolley , Robert W. Keys , Kim Byron Roberts , Mark A. Newhouse , Michael J. Yadlowsky
IPC分类号： H01S3/094 , H01S3/13 , H01S3/131 , H01S5/0687 , H01S5/50 , H01S3/00
CPC分类号： H01S3/094003 , H01S5/0687 , H01S2301/04 , H01S3/06754 , H01S3/09415 , H01S3/1301 , H01S5/0617 , H01S5/06804 , H01S5/50
摘要： The variables and parameters previously understood to affect the gain spectrum of an optical amplifier 13 were: (1) the wavelengths to be amplified; (2) the input power levels at those wavelengths; (3) the characteristics of the amplifying medium 20; (4) the insertion loss spectra of the amplifier's components, including any filter(s) used for gain flattening; (5) the pump band chosen to pump the amplifying medium 20; and (6) the total amount of pump power supplied in the chosen pump band. An additional fundamental variable has been identified which can be used to control the gain spectrum of an optical amplifier 13, namely, the center wavelength of the spectrum of the pump's output power within the chosen pump band. Methods and apparatus for using this variable for this purpose are disclosed.For example a, transmission system is disclosed having a transmitter 11 and a receiver 10 connected by an optical fiber 12. A plurality of optical amplifiers 13 are located along the optical fiber 12 to amplify signal channels between the transmitter and receiver. Each of the amplifiers has a pump light source 21, the wavelength of which is such that contributions to differential gain due to pump light wavelength related effects is substantially reduced.Also disclosed is a WDM transmission system having a transmission path including a concatenation of laser diode pumped optical amplifiers 13 wherein the gain spectrum of an amplifier is controlled at least in part by a feedback loop regulating the temperature of its laser diode pump 21. The feedback loop may for instance derive its control signal from a measure of the drive current applied to the pump, of the emission wavelength of the pump, or of the disparity between the power output from the amplifier in one of the multiplexed signal channels and that from at least one other of the channels.
摘要翻译：以前被理解为影响光放大器13的增益谱的变量和参数是：（1）待放大的波长; （2）这些波长的输入功率电平; （3）放大介质20的特性; （4）放大器组件的插入损耗谱，包括用于增益平坦化的任何滤波器; （5）选择泵送放大介质20的泵浦带; 和（6）在所选泵浦带中供应的泵功率的总量。已经确定了可以用于控制光放大器13的增益谱的附加基本变量，即所选择的泵浦波段内的泵的输出功率的频谱的中心波长。公开了用于该目的的该变量的方法和装置。例如，公开了具有由光纤12连接的发射机11和接收机10的传输系统。沿着光纤12定位多个光放大器13以放大发射机和接收机之间的信号信道。每个放大器具有泵浦光源21，其波长使得由于泵浦光波长相关效应而对差分增益的贡献显着降低。还公开了一种WDM传输系统，其具有包括激光二极管泵浦光放大器13的级联的传输路径，其中放大器的增益谱至少部分地通过调节其激光二极管泵21的温度的反馈回路来控制。反馈循环可以例如从施加到泵的驱动电流，泵的发射波长的量度或者在多路复用的信号通道中的放大器输出的功率与从至少另外一个渠道。

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