Analysis of Hybrid Optical Amplifiers for Dense Wavelength Division Multiplexing (DWDM) Systems Using Adequate Channel Spacing

The entire network system makes use of Dense Wavelength Division Multiplexing (DWDMs) has emerged through optical amplifier implementation. The further performance of DWDM network is improved through exploiting Hybrid Optical Amplifiers. This paper proposed an idea of various hybrid optical amplifiers for dense wavelength division multiplexed system at decreased channel spacing (<0.2 nm) to achieve higher gain and reduced crosstalk. Here, a semiconductor optical amplifier (SOA), and Raman amplifier, both in combination with a erbium doped fibre amplifier that is Raman-EDFA(R-E) and EDFA-Semiconductor Optical Amplifier (E-S) are investigated for the first time at 0.05 and 0.1nm channel spacing. We exhibit that the R-E (HOA) gives better gain (23.9 dB) and bring around reduced cross-talk (-14.1dB) by using minimum bandwidth. Based on the simulation results, it is concluded that 70 km is the finest span distance at which R-E accomplish a 2450 km transmission distance in terms of performance.

Keywords: HOA, DWDM, Q-factor, BER, R-E and E-S.