Patent ID: 8873953
Filing Date: 2014-10-28
Classification: H04B,H04L,H04Q

Abstract:
1. A method for multi-symbol polarization switching for differential detection optical systems, comprising the steps of: modulating output light of a laser source by a DQPSK modulator; splitting a stream of data comprising de-multiplexing the stream of data into multiple parallel low-speed data blocks; manipulating the low-speed data blocks comprising: driving the DQPSK modulator with the multi-symbol DQPSK differential encoded signals to generate optical multi-symbol DQPSK differential-encoded signals, polarizing said optical multi-symbol DQPSK differential-encoded signals with a polarizing modulator to generate optical multi-symbol polarization-switched DQPSK signals, wherein the modulation speed of the polarizing modulator determines how often polarization states vary; and recovering correct original data by a receiver using differential detection.