Abstract
An improved radio-over-fiber (ROF) system based on optical carrier suppression modulation (OCS) is presented. In this ROF
system, through adopting frequency down-conversion of the down-sideband, a millimeter (mm) wave emitted signal, whose
frequency is higher than twice of the radio frequency (RF) which is used to drive the dual-arm LiNbO3 Mach-Zehnder intensity
modulator (DLN-MZI) in OCS, can be obtained at the base station. Meantime, self-mixing technique has been used to realize
frequency down-conversion of the up-stream link, and then the base station can be further simplified due to that the local
oscillation (LO) is not necessary. For 2.5 Gb/s down-link data stream, the transmission characteristics of this system have
been investigated. The results show that the effect of the fiber chromatic is not serious, after transmission over 140 Km
single-mode fiber, the eye diagram is still open and the power penalty is about 0.86 dBm.
Keywords
Optical wireless communication, Radio-over-fiber (ROF), Optical carrier suppression modulation, Optical mm-wave.
Citation
YIN-CHUAN ZHAO, ZHENG-MAO WU, GUANG-QIONG XIA, An improved radio-over-fiber communication system based on optical carrier suppression, Optoelectronics and Advanced Materials - Rapid Communications, 3, 8, August 2009, pp.791-794 (2009).
Submitted at: June 2, 2009
Accepted at: July 31, 2009