公开(公告)号：US06229606B1

公开(公告)日：2001-05-08

申请号：US09415348

申请日：1999-10-08

Applicant: David Way ,  Tiejun Xia

Inventor： David Way ,  Tiejun Xia

IPC: G01J400

CPC classification number: H04B10/2569 ,  G01M11/336

Abstract: A method, a system and a computer program product configured to determine a differential group delay of two sequential optical beams based on a frequency dependence of a length of an optical path traveled by the two sequential optical beams in a dispersion compensation grating. The determined differential group delay provides a measure of polarization mode dispersion in the dispersion compensation grating.

Abstract translation: 一种方法，系统和计算机程序产品，其被配置为基于在色散补偿光栅中由两个顺序光束行进的光路的长度的频率依赖性来确定两个顺序光束的差分组延迟。 确定的差分群延迟提供了色散补偿光栅中偏振模色散的测量。

公开(公告)号：US06421153B1

公开(公告)日：2002-07-16

申请号：US09346480

申请日：1999-07-01

Applicant: David Way ,  T. J. Xia

Inventor： David Way ,  T. J. Xia

IPC: H04B1000

CPC classification number: H04B10/2569

Abstract: A state-of-polarization (SOP)-independent device 226, 326 and method for determining polarization mode dispersion (PMD) in an optical communication system having an optical transmission line, including a detector 244, 344 coupleable to the optical transmission line, where the detector 244, 344 is capable of analyzing a pulse shape of an optical signal on the optical transmission line to determine PMD of the optical signal. A corrector 246, 346 may be coupled to the detector 244, 344, where the corrector 246, 346 is capable of compensating the optical signal for the determined PMD. A controller 242, 342 may be coupled to the detector 244, 344 and the corrector 246, 346. The pulse shape may comprise an eye diagram, which may contain a first peak and a second peak due to PMD, where the PMD determined by the detector 244, 344 is a function of the distance between the detected first and second peaks, which is indicative of a time delay between the detected first and second peaks. The device and method may also include a verifier 348 coupled to the corrector 246, 346, where the verifier 348 is capable of verifying that the corrector 246, 346 correctly compensated the optical signal for the PMD.

Abstract translation: 偏光状态（SOP）非依赖性装置226,326和用于确定具有光传输线的光通信系统中的偏振模色散（PMD）的方法，包括可耦合到光传输线的检测器244,344，其中 检测器244,344能够分析光传输线上的光信号的脉冲形状以确定光信号的PMD。 校正器246,346可以耦合到检测器244,344，其中校正器246,346能够补偿所确定的PMD的光信号。 控制器242,342可以耦合到检测器244,344和校正器246,346。脉冲形状可以包括眼图，其可以包含由于PMD引起的第一峰值和第二峰值，其中由PMD确定的PMD 检测器244,344是检测到的第一和第二峰值之间的距离的函数，其表示检测到的第一和第二峰值之间的时间延迟。 装置和方法还可以包括耦合到校正器246,346的验证器348，其中验证器348能够验证校正器246,346正确地补偿PMD的光信号。