Title :
All-frequency PMD compensator in feedforward scheme
Author :
Phua, P.B. ; Haus, Hermann A. ; Ippen, E.P.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Massachusetts Inst. of Technol., Cambridge, MA, USA
fDate :
5/1/2004 12:00:00 AM
Abstract :
We present the architecture of a broad-band polarization mode dispersion (PMD) compensator in a feedforward PMD compensation scheme. It is comprised of four stages. The net effect of the first two stages is equivalent to a frequency dependent polarization rotation that aligns all PMD vectors into a common direction. The third stage compensates the frequency dependent variable differential group delay (DGD) and the last stage compensates for the isotropic dispersion created by the first three stages. In Stokes space formulation, we describe the algorithm to find the required rotation angles of each stage using the PMD concatenation rule, and show that these rotation angles can be synthesized using all-pass filters (APF) in a compact integrated optics circuit. Through numerical simulations, we show significant improvement of the signal quality as a result of the compensation.
Keywords :
all-pass filters; compensation; feedforward; integrated optics; optical fibre communication; optical fibre dispersion; optical fibre polarisation; PMD compensator; Stokes space formulation; all-pass filters; differential group delay; feedforward scheme; integrated optics circuit; polarization mode dispersion; polarization rotation; Degradation; Delay; Frequency dependence; Integrated circuit synthesis; Laboratories; Optical fiber polarization; Optical filters; Polarization mode dispersion; Student members; Transmission line matrix methods; APF; All-pass filters; PMD; compensation; higher-order; polarization-mode dispersion;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2004.825347
