公开(公告)号：US20030147114A1

公开(公告)日：2003-08-07

申请号：US10354718

申请日：2003-01-30

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Inuk Kang ,  Linn Frederick Mollenauer

IPC: G02F001/03

CPC classification number: H04B10/5051 ,  H04B10/505 ,  H04J14/02

Abstract: Method and apparatus for synchronizing two different types of modulators in an optical transmission system includes a first modulator generating an optical pulse train, a second modulator encoding data onto the optical pulse train, an optical filter resolving upper and lower modulation sidebands of the optical data and an analyzer measuring the optical power of modulation sidebands and converting the received optical power of the sidebands into a control signal for synchronizing the two modulators. A wedged etalon is the filter element selecting the USB and LSB from the optical data spectrum. The analyzer contains photo-detectors measuring the optical power of the filtered USB and LSB and an electronic differential amplifier producing a control signal based upon photo-detector output. The phase shifter, in response to said control signal, adapts the temporal delay of the first modulator to reduce differences between the power levels of said upper and lower sidebands.

Abstract translation: 用于在光传输系统中同步两种不同类型的调制器的方法和装置包括：产生光脉冲串的第一调制器，对光脉冲串编码数据的第二调制器，分解光数据的上下调制边带的光滤波器; 测量调制侧带的光功率并将所接收的边带的光功率转换成用于使两个调制器同步的控制信号的分析器。 楔形标准具是从光学数据光谱中选择USB和LSB的滤波器元件。 分析仪包含测量滤波后的USB和LSB的光功率的光电检测器以及基于光电检测器输出产生控制信号的电子差分放大器。 移相器响应于所述控制信号调整第一调制器的时间延迟以减小所述上边带和下边带的功率电平之间的差异。