Patent ID: 8634723
Filing Date: 2014-01-21
Classification: H04B

Abstract:
1. An optical communication system for data transmitting from a transmitter to a receiver over fiber using dual polarization light, comprising: a first data controller at the transmitter side; the first controller performs a first polarization mixing transformation on a data for a first polarized beam and a data for a second polarized beam; the second polarized beam being orthogonal to the first polarized beam; a second data controller at the receiver side; the second controller performs a second mixing transformation on a received data transmitted in the first polarized beam and a received data transmitted in the second polarized beam; this second transformation is performed in an opposite direction to a transmitter transformation with exactly same sequence as in the transmitter part, wherein the data is transmitted in orthogonal frequency division multiplexed (OFDM) format, further comprising a forward error correction (FEC) encoder unit for data encoding at the transmitter side; a FEC decoder unit at the receiver side; and wherein FEC block is longer than polarization correlation time; further comprising an interleaver at the transmitter side; and a de-inverleaver at the receiver side; and wherein for the signal at rate R bit/sec, FEC block length of N bit and interleaving depth of M, the polarization correlation time T is T<=2*N*M/R.