Abstract
In this paper, the performance of radio-over-fiber (RoF) links employing intensity modulation has been investigated in terms of bit-error rate (BER) and optical signal-to-noise ratio (SNR). An analytical model including dispersion, laser and radio frequency (RF) oscillator phase noise is constructed to estimate the BER performance for 16-quadrature amplitude modulation (QAM) based radio over fiber systems. It has been observed that the RF oscillator line-width and filter bandwidth affect the BER significantly. BER increases monotonously as the value of laser line width increases but for increased RF oscillator line widths specifically above 1 Hz, the BER degrades to a great extent [10 −2 ] which is not desirable for efficient communication system.
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