Multi-standard radio-over-fiber systems using CMOS-compatible Si avalanche photodetectors

We present a radio-over-fiber (RoF) receiver using a Si avalanche photodetector fabricated with 0.18 mum standard complementary metal-oxide-semiconductor (CMOS) technology. Using the device, multi-standard services including 2-GHz band wideband code division multiple access (WCDMA) and 5-GHz band wireless local area network (WLAN) signals are successfully transmitted. With error vector magnitude (EVM) measurements, interference between two signals in RoF system is analyzed.