Abstract
This study aimed to build a numerical model of carrier extraction from dual-polarization phaseconjugated
twin waves (DP-PCTWs) to investigate polarization dependence on the carrier extraction in a
pump phase-locked loop for phase-sensitive optical amplifier repeaters. First, the numerical model was
developed, and extracted carrier power of 40- Gbit/s DP-PCTWs with quadrature phase-shift keying
format was calculated. Numerical results show the extracted carrier disappears when the PCTWs are
circular polarization, and polarization dependence exists on the carrier extraction. Then, carrier
extraction of a 10- Gbit/s DP-PCTW with binary phase-shift keying format was experimentally
demonstrated. The extracted carrier power was found to be relatively low when the DP-PCTWs are
circular polarization, and this trend agrees closely with the numerical results. These results show the
reasonability of the numerical model and existence of polarization dependence on the carrier extraction
from DP-PCTWs.
