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。

公开(公告)号：US20040227949A1

公开(公告)日：2004-11-18

申请号：US10439828

申请日：2003-05-16

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Christophe J. Dorrer ,  Inuk Kang

IPC: G01B009/02

CPC classification number: G01J11/00

Abstract: A method and apparatus for the characterization of an optical pulse includes splitting an optical pulse into two replicas separated by a delay, modulating at least one of the two replicas with a linear temporal phase modulation, measuring a spectrum of the modulated replicas, and characterizing the optical pulse using the measured spectra. In one embodiment of the present invention a spectral phase difference between the replicas is obtained from the measured spectrum using Fourier Transform Spectral Interferometry.

Abstract translation: 用于表征光脉冲的方法和装置包括将光脉冲分为两个由延迟分离的副本，用线性时间相位调制来调制两个副本中的至少一个，测量调制副本的频谱，以及表征 光脉冲使用测量光谱。 在本发明的一个实施例中，使用傅里叶变换光谱干涉法从所测量的光谱获得复制品之间的光谱相位差。

公开(公告)号：US20040218930A1

公开(公告)日：2004-11-04

申请号：US10427839

申请日：2003-05-01

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Christophe J. Dorrer ,  Inuk Kang

IPC: H04B010/04 ,  G02F001/01

CPC classification number: G01J11/00

Abstract: A method and apparatus for characterizing an optical pulse using a reduced complexity chronocyclic tomography is described. In one example, an optical pulse train is modulated using quadratic temporal phase modulation. A first spectral intensity of the optical pulse train is measured after a quadratic temporal phase modulation having a first amplitude. A second spectral intensity of the train of optical pulses is then measured in response to the quadratic temporal phase modulation having a second amplitude. At least one of the group delay and the spectral intensity associated with the train of optical pulses is computed using the first spectral intensity and the second spectral intensity.

Abstract translation: 描述了使用复杂度较低的复杂断层扫描来表征光脉冲的方法和装置。 在一个示例中，使用二次时相调制来调制光脉冲串。 在具有第一幅度的二次时间相位调制之后测量光脉冲串的第一光谱强度。 然后响应于具有第二幅度的二次时间相位调制来测量光脉冲序列的第二光谱强度。 使用第一光谱强度和第二光谱强度计算与光脉冲序列相关联的组延迟和光谱强度中的至少一个。