Performance optimization of radio-on-fiber systems employing erbium doped fiber amplifier for optical single sideband signals considering intermodulation distortion

A Study of various Trends and Enabling Technologies in Radio over Fiber (RoF) Systems

“…In the high data rate services generally, the level of IM3 is significantly higher than that of noise and hence an entire system performance can be very sensitive and can get severely degraded by IM3. Many researchers have used a variety of technologies such as a power control of an input signal and decrease of IM3 and to overcome this performance degradation [12]. The use of an amplifier degrades the signal tonoise ratio (SNR) in view of system performance, since a signal power and a noise power A c c e p t e d M a n u s c r i p t 7 amplify at the same time, and an additional noise due to the amplifier also decreases the SNR.…”

“…It has been shown that a noise penalty strongly influenced the system performance of a fiber optic link and EDFA utilization degraded an entire system performance [13]. Analysis of the entire RoF system performance with dual electrode Mach-Zehnder modulator (DEMZM) and EDFA against IM3 for OSSB signals has been done [12]. Also the investigation of the optimum signal to noise+distortion ratio (SNDR) and input RF power has also been done in order to maximize the overall system performance with and without EDFA.…”

Performance analysis of an ultra high capacity 1 Tbps DWDM-RoF system for very narrow channel spacing

“…DWDM is a multiplexed system with channel spacing less than or equal to 200GHz [5]. A signal-to-noise-and-distortion ratio (SNDR) has been investigated considering fiber dispersion and the results showed that the SNDR was adequately improved by EDFA in the noise-dominant case [6]. Normally a single fiber can import information in a single direction but with WDM it is possible to use a single fiber for two-way communication using distinct wavelengths.…”