中国物理B ›› 2005, Vol. 14 ›› Issue (8): 1591-1593.doi: 10.1088/1009-1963/14/8/021

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Analysis of pulse broadening induced by the second-order PMD

沈平1, 付松年2, 吴重庆3   

  1. (1)School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore; (2)School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China; (3)School of Science, Beijing Jiaotong University, Beijing 100044, China
  • 收稿日期:2004-09-21 修回日期:2005-04-29 出版日期:2005-07-13 发布日期:2005-07-13
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60272010) and the National High Technology Development Program of China (Grant No 2003AA122510).

Analysis of pulse broadening induced by the second-order PMD

Fu Song-Nian (付松年)a, Wu Chong-Qing (吴重庆)b, Shum Ping (沈平)c    

  1. a School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China; b School of Science, Beijing Jiaotong University, Beijing 100044, China; c School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore
  • Received:2004-09-21 Revised:2005-04-29 Online:2005-07-13 Published:2005-07-13
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60272010) and the National High Technology Development Program of China (Grant No 2003AA122510).

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摘要： We propose a new conception of depolarization vector to describe the effect of depolarization induced by the second-order polarization mode dispersion (PMD). Deriving the formula of pulse broadening induced by the second-order PMD, we find that the polarization-dependent chromatic dispersion (PCD) always enhances the pulse broadening. However the depolarization vector decreases the pulse broadening. The pulse broadening is correlated with the bit-rate of a transmission system. By adjusting the directions of the Stokes vector of initial state of polarization, initial first-order polarization dispersion vector and depolarization vector to be parallel to each other,one can obtain an optimum dispersion compensation. But when the PCD is not equal to zero, the optimum dispersion cannot achieve a complete compensation,and the minimum pulse broadening is equal to σ= (21/2/4)( DCF/T0).

关键词: second-order PMD, pulse broadening, PMD compensation, polarization-dependent chromatic dispersion (PCD), depolarization vector

Abstract: We propose a new conception of depolarization vector to describe the effect of depolarization induced by the second-order polarization mode dispersion (PMD). Deriving the formula of pulse broadening induced by the second-order PMD, we find that the polarization-dependent chromatic dispersion (PCD) always enhances the pulse broadening. However the depolarization vector decreases the pulse broadening. The pulse broadening is correlated with the bit-rate of a transmission system. By adjusting the directions of the Stokes vector of initial state of polarization, initial first-order polarization dispersion vector and depolarization vector to be parallel to each other,one can obtain an optimum dispersion compensation. But when the PCD is not equal to zero, the optimum dispersion cannot achieve a complete compensation,and the minimum pulse broadening is equal to $\sigma$= (21/2/4)(DCF/T0).

Key words: second-order PMD, pulse broadening, PMD compensation, polarization-dependent chromatic dispersion (PCD), depolarization vector

中图分类号:  (Ultrafast processes; optical pulse generation and pulse compression)

  • 42.65.Re
42.25.Bs (Wave propagation, transmission and absorption) 42.81.-i (Fiber optics)