Abstract
In this paper, we investigate the impact of interferometer delay time in a 5Gb/s optical double sideband-suppressed carrier (ODSB-SC) RoF system transmitting two wavelength interleaved radio frequency (RF) signals at 10 and 15GHz over an optical fiber. Here, an optical Mach–Zehnder modulator is used for both optical carrier suppression and signal modulation. At the receiver, delay interferometer is used for the separation of RF frequency signals. We analyze the performance of the RoF system by varying the value of delay time of interferometer from 0.02 to 0.14ns. The result shows that the RoF system performance is optimum for the time delay of 0.1ns. Further, the optical spectrums, RF spectrums and eye diagrams of two interleaved RF signals have been compared.
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