Effect of Modulation Technique in Mach-Zehnder Modulator (MZM) in Optical OFDM System

Provided by: International Journal of Computer Networks and Wireless Communications (IJCNWC)
Topic: Mobility
Format: PDF
In this paper, the authors highlight the Bit Error Rate (BER) performance of a radio-over-fiber system utilizing Binary Phase Shift Keying (BPSK), M-QAM and QPSK in the external modulator which is the Mach-Zehnder Modulator (MZM). The results have been obtained from the RoF link over 8, 30, 60 90 and 120km distance to study the effect of nonlinear dispersion and attenuation of signal and compare the results other modulation. Furthermore, the chromatic dispersion has no effect on MZM whereas it has distinct effect on OOK modulation scheme without optical dispersion compensation, the performances of different modulation schemes such as OOK, PPM and PAM are analyzed.

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