The optimized schemes of optical labels about DB and PPM over POLMUX-CSRZ-DQPSK payload in 100Gb/s OLS network

Abstract

Two orthogonal modulation optical label switching (OLS) schemes, which are based on payload of polarization multiplexing-carrier suppressed return to zero-differential quadrature phase shift keying (POLMUX-CSRZ-DQPSK) with label identifications of duobinary (DB) label and pulse position modulation(PPM) label, are proposed in high speed OLS network. The receiver performance of two optical labels and the optimized extinction ratio (ER) are compared with amplitude shift keying (ASK) label by simulation in long transmission distance. The results show DB label has more advantages in fast optical label switching system, and PPM label can improve receiver sensitivity of payload significantly. Two labels have excellent performance in high bit-rate transmission system.