公开(公告)号：US06697577B1

公开(公告)日：2004-02-24

申请号：US09431165

申请日：1999-11-01

申请人： Jinghui Li ,  Hugues Tournier ,  Joel Milgram ,  Suet Yuen ,  LeRoy Pick ,  Stephen Roberts ,  Bernard Thiboutot

发明人： Jinghui Li ,  Hugues Tournier ,  Joel Milgram ,  Suet Yuen ,  LeRoy Pick ,  Stephen Roberts ,  Bernard Thiboutot

IPC分类号： H04B1006

CPC分类号： H04B10/695 ,  H04B2210/078

摘要： A tuning system for use in a receiver of an optical transmission system. The receiver includes a data channel transporting a data signal and a monitoring channel transporting a copy of the data signal. The tuning system includes a processing module for processing the copy of the data signal to generate a control signal conveying tuning information. This tuning information is used by the receiver to alter an operating point of the receiver on the data channel. The operating point of the receiver that is susceptible to be altered by the control signal is a decision threshold applied on the data signal to discriminate one binary value from another binary value on the data channel of the receiver. This approach allows, when required or desired, tuning of the system while the system is in service. This is possible since the tuning of the system is performed using the monitoring channel, and does not disturb nor corrupt the actual data being transported on the data channel.

摘要翻译： 一种用于光传输系统的接收机的调谐系统。 接收机包括传送数据信号的数据信道和传送数据信号的副本的监视信道。 调谐系统包括用于处理数据信号的副本以产生传送调谐信息的控制信号的处理模块。 该调谐信息被接收机用于改变数据信道上接收机的工作点。 容易被控制信号改变的接收机的工作点是施加在数据信号上的判定阈值，以将一个二进制值与接收机的数据信道上的另一个二进制值进行区分。 当需要或期望时，该方法允许在系统使用时调整系统。 这是可能的，因为系统的调谐是使用监视通道执行的，并且不会干扰或损坏在数据通道上传送的实际数据。

公开(公告)号：US5841918A

公开(公告)日：1998-11-24

申请号：US703034

申请日：1996-08-26

申请人： Jinghui Li

发明人： Jinghui Li

IPC分类号： G02B6/34 ,  G02B6/28

CPC分类号： G02B6/2932 ,  G02B6/29395

摘要： A system for modifying an input optical signal by reducing its bandwidth and modifying its central wavelength has an optical circulator with at least three ports and at least two optical filters coupled to consecutive ports of the circulator. The first filter produces a predetermined reflected band off the input optical signal. The second filter produces a predetermined transmission band as a part of the reflected band. Either or both of the optical filters are tunable to shape and trim the input signal in a predetermined manner. A multi-channel and cascade configurations may be formed. The system may serve e.g. as a tunable filter or as an add/drop module in WDM communication networks.

摘要翻译： 通过减小其带宽并修改其中心波长来修改输入光信号的系统具有至少三个端口的光循环器和耦合到循环器的连续端口的至少两个滤光器。 第一滤波器从输入光信号产生预定的反射带。 第二滤波器产生作为反射带的一部分的预定的传输频带。 光学滤波器中的任何一个或两个可调谐以以预定方式成形和修整输入信号。 可以形成多通道和级联配置。 该系统可以例如。 作为可调谐滤波器或作为WDM通信网络中的添加/删除模块。

公开(公告)号：US5815308A

公开(公告)日：1998-09-29

申请号：US650536

申请日：1996-05-20

申请人： Hyung B. Kim ,  Farideh Khaleghi ,  Jinghui Li ,  Mohsen Kavehrad

发明人： Hyung B. Kim ,  Farideh Khaleghi ,  Jinghui Li ,  Mohsen Kavehrad

IPC分类号： H01S3/067 ,  H01S3/10 ,  H01S3/16 ,  H04B10/17 ,  H01J5/16 ,  H01S3/103 ,  H04B9/00

CPC分类号： H04B10/2971 ,  H01S3/10023 ,  H04B10/2912 ,  H01S3/06787 ,  H01S3/1003 ,  H01S3/1608

摘要： Bidirectional WDM transmission at 2.5 Gb/s using a bidirectional erbium-doped fiber amplifier (EDFA) is demonstrated over a distance of 300 km. A symmetrical EDFA configuration with a frequency tunable reflection attenuator is used as a bidirectional amplifier. Experimental results show that the allowable gain of the EDFA can be increased significantly while the associated bit error rate BER penalty remains negligible.

摘要翻译： 使用双向掺铒光纤放大器（EDFA），2.5 Gb / s的双向WDM传输在300公里的距离内展现。 具有频率可调谐反射衰减器的对称EDFA配置被用作双向放大器。 实验结果表明，EDFA的容许增益可以显着提高，相关的误码率BER值仍然可以忽略不计。