Abstract
Free-space optical (FSO) communication is one of the choice of researchers for most of the bandwidth hungry applications in evolving networks where the deployment of optical fiber is not directly possible as a transmission medium. In this research article, benefits, challenges, applications and role of FSO is discussed in detail for evolving networks. Further, performance of FSO communication system is tested using four channels of dense wavelength division multiplexing (DWDM). Various simulations are performed on FSO including different weather conditions, that directly affect the link performance. Many important parameters such as distance, data rate, bit error rate, amplifier gain, transmitter power, and attenuation under different weather conditions are tested in this research work. The operation of FSO communication system is carried out in the range 760-850 nm where equal channel spacing is considered for the working of DWDM communication system. Moreover, a fair comparison of proposed system is also presented for its operation in two more bands i.e. C and L-band, to show which one offers better performance. Simulation are performed in licensed version of Optisystem 14.0 and MATLAB. For the analysis of proposed system, results are presented in the form of BER and Q-factor plots.
Highlights
INTRODUCTIONThe exponential increase in the bandwidth requires technology that should lead beyond the conventional copper wires and meet the demand of increasing bandwidth
PAT LOS RO-Free-space optical (FSO) CO-OFDM DivisionThe exponential increase in the bandwidth requires technology that should lead beyond the conventional copper wires and meet the demand of increasing bandwidth
It is observed that Q-factor reaches a peak at low data rates
Summary
The exponential increase in the bandwidth requires technology that should lead beyond the conventional copper wires and meet the demand of increasing bandwidth This urge of high data rate and fast speed of wireless technology resulted in the emergence of FSO [1]. FSO systems are named as open-air photonics, free-space photonics, optical wireless technology, or infrared broadband technology. These systems operate in the near-infrared region wavelength ranging from 399-352.6 THz and between 199.8-. FSO serves in an unlicensed band in which an effective point to point communication is made Atmospheric conditions such as rain, fog, haze affect the link quality and signal propagation [6]. The weather conditions determine the reliability of FSO communication system greatly
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