Abstract
A scheme of format conversion between OOK signal and optical quadrature phase shift keying (QPSK)/16-ary quadrature amplitude modulation (16QAM) signal based on cross phase modulation (XPM) effect in semiconductor optical amplifiers (SOA) is proposed. Theoretical analysis and simulations of the format conversion scheme are conducted to validate the feasibility of the proposal. In this proposal, the QPSK signal is generated after passed an SOA, and then the 16QAM signal is generated based on XPM in a single SOA-MZI after two QPSK signal coupled. The performance and the optimal design of the 10Gbit/s format conversion system under various key parameters of SOAs are evaluated and discussed. The receiver sensitivity of the converted QPSK signal and 16QAM signal after detection is -32dBm and -28.5dBm with BtB at BER of 10 -9 , respectively. Simulation results present useful to enable interconnection between backbone network and access network.
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