Simulation and Analysis the Performance of 3970 Km DWDM Transmission Link Employing Optimized Semiconductor Optical Amplifiers

Abstract

In this paper first we try to analysis the behavior of<br />the SOAs in the optical networks and then have proposed a<br />numerical simple model to simulate the behavior of the<br />semiconductor optical amplifiers. After that by employing this<br />model as inline amplifier for a DWDM optical system, we have<br />simulated the transmission of 10 channels with bit rate 10 Gb/s<br />up to distance 3970 km with RZ-DPSK modulation format at 20<br />GHz channel spacing. On the other hand in order to amplify the<br />signal at the transmission link, we have used 73.5km relay span<br />consist of 63km single mode fiber (SMF), 10.5km dispersion<br />compensating fiber (DCF) and a SOA at the end. Our results<br />show that by optimizing the key parameters of the SOA such as<br />the bias current and the input power and furthermore by proper<br />placement of the spans, we can transmit the signal with good<br />amplification and low noise power.