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
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
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).
Received: 21 September 2004
Revised: 29 April 2005
Accepted manuscript online:
PACS:
42.65.Re
(Ultrafast processes; optical pulse generation and pulse compression)
Fund: 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).
Cite this article:
Fu Song-Nian (付松年), Wu Chong-Qing (吴重庆), Shum Ping (沈平) Analysis of pulse broadening induced by the second-order PMD 2005 Chinese Physics 14 1591
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