Effects of temperature and polarization current on a laser signal quality in fiber optics communication systems

Abstract

this paper concerns the analysis and evaluation of the effects of polarization current and temperature of an optical fiber laser based on audio communication systems. For that purpose, we will study the effects of polarization current and temperature on the two main parameters of the communication chain; the transmitter (vertical cavity surface emitting laser) and the receiver (at the end of optical communication chain). The frequencies range considered are between 20Hz and 20 kHz, which correspond to the audible field. The quality of the restored signal depends on the different harmonics that it contains. We need to perform spectrum measurement quality by monitoring and measuring two factors TDH and SNR for the different experiments. The experimental results show that a high-quality audio laser signal can be obtained in fiber optics communication systems employing a vertical cavity surface emitting laser at a temperature of 10 °C and a current of 5 mA without the need for optimized optics.