Transmission properties of a novel ASK/FSK orthogonal labelled signal based on two conjugated IM modulation

We present a novel scheme of high bit rate ASK/FSK orthogonal labelling. The FSK transmitter is based on two external modulated lasers driven by two inverted electrical data. The generated FSK is easy for detection and has a small cross-talk to optical label signal. Simulations and latest experiments of the transmission performance of a 2.5 Gb/s ASK labelled 40 Gb/s FSK signal is also investigated.