Experimental demonstration: Differential detection of 10 Gbps optical OOK signal over turbulent channel

Performance estimation of polarization multiplexed DPSK signal transmission over temporally correlated free space optical channel

“…We have not found such work for DPSK transmission over the FSO link. Although in our recent work, we show that the differential detection technique can perform better than conventional direct detection techniques for a medium and strong turbulence channel condition over a slow varying turbulence channel for terrestrial communication [15]. So, there is a need to study the PDM-DPSK system over a slow varying FSO channel.…”

“…The strength of the turbulence in FSO channel is the function of the refractive index structure parameter(C 2 n ), which depends on the temperature variation of the environment [5]and transversal wind velocity [5], [9], [10]. It is shown that the correlation time of the received signal strongly depends on the turbulence strength of the FSO link and as the strength of the turbulence increases, the correlation time decreases [15]. Thus, the turbulence in the FSO channel is a time-dependent process and varies slowly (in the order of milliseconds) with the environment temperature and wind velocity [16].…”

“…Thus, the turbulence in the FSO channel is a time-dependent process and varies slowly (in the order of milliseconds) with the environment temperature and wind velocity [16]. Previous studies did not consider the effect of the slowly varying nature of the turbulent channel which is very important for Gbps rate transmission as the FSO channel varies at kHz rate [15], [17], [18]. Moreover, works have reported the performances of the BPSK coherent polarization division multiplexed (PDM) systems for FSO communication [19] to increase transmission capacity.…”

Development of Unified Hybrid WDM-PON With Spectrally Hidden Data Channel System and FBG Optical Sensor Network

“…The proposed hybrid optical transmission system increases the efficiency, adds additional protection to the channel frequencies, and allows for the realization of such complex hybrid optical transmission solutions. The results gathered show that it is possible to configure and develop such a hybrid unified system without overlapping the realized data transmission channels and optical sensor channels while ensuring at least 20 km long transmission line with negligible (less than 0.5 dB) power penalty at commonly used [9] pre-FEC BER level of 10 3 and an average bit error rate (BER) of 7.16×10 −17 (for WDM-PON system) and 1.11×10 −5 (for hidden channel system).…”