Abstract
The impact of p-ratio i.e. ratio of carrier power to total received RF power at control office (CO) on Bit error rate (BER), Q- performance parameter and Optical signal noise ratio (OSNR) of RoF communication system is theoretically analyzed using angular full-linewidth at half maximum (FWHM) of Lorentzian shape for the RF oscillator in this paper. As reduction in Laser linewidth improves the performance of RoF system, the RF oscillator linewidth at FWHM also plays an important role in improving the performance of RoF system.
Highlights
For realization of future high performance integrated networks, broadband distribution & access networks and to meet the increasing demand of multimedia services with a guaranteed quality of service, radio over fiber (RoF) technology comes out as the most promising technology
The output signal of the MZM is transmitted via a standard single-mode fiber (SSMF) and detected by a PD to generate the photocurrent at a base station (BS)
It is observed that Optical signal noise ratio (OSNR) increases with increasing the responsivity (R-parameter) of the photodetector along with by using the angular full-linewidth at half maximum (FWHM) of Lorentzian shape the RF oscillator
Summary
For realization of future high performance integrated networks, broadband distribution & access networks and to meet the increasing demand of multimedia services with a guaranteed quality of service, RoF technology comes out as the most promising technology. A simple technique, directly modulates the amplitude of the laser beam but suffers from a laser-frequency chirp effect that degrades severely the performance of the system This can be eliminated by using the external-modulation scheme [5] used to modulate the phase of the optical carrier. For frequency range beyond 5 GHz external modulation is needed for higher speeds No doubt such systems are capable of meeting the future requirements of High speed high data transfer services but some degradations effects the performance of such systems such as fiber dispersion and modulator’s nonnearity. For overcoming this power degradation, an optical single sideband (OSSB) external modulation scheme is employed [5].
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