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2. 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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