Free-space optical communication is emerging as a low-power, low-cost, and high data rate alternative to radio-frequency in short- medium-range applications. However, it requires close-to-line-of-sight link between the transmitter receiver. This paper proposes robust H∞ control law for free-space (FSO) beam pointing error systems under controlled weak turbulence conditions. The objective mainta...

We propose and demonstrate free-space optical (FSO) communication using photonic crystal surface-emitting lasers (PCSELs). Unlike other types of conventional semiconductor lasers, such as edge-emitting (EELs) vertical-cavity (VCSELs), PCSELs achieve much larger area single-mode coherent lasing, this unique feature enables high-power (>watt) lens-free operations at the same time. To date, these ...

In this paper, we study a mixed cooperative communication system consisting of power line (PLC) and free-space optical (FSO) links, where the PLC link suffers from log-normal fading is affected by both impulsive background noises. Meanwhile, FSO undergoes Gamma-Gamma with atmospheric turbulence pointing errors. More specifically, present closed-form expressions for probability density function ...

<p>This study clarified an overview of wired and wireless optical communication system block diagram with practical applications. Freespace (FSO) is a trending field that rising so fast to replace electromagnetic waves in communication, we have presented theoretical circuit as example modified it fit work purposes, simulation used then done printed board (PCB) designed. Light emitting dio...

In fiber-based optical receivers such as coherent receiver, the signal reaching receiver's aperture is coupled to fiber through a set of lenses. Due atmospheric turbulence, however, coupling efficiency, which defined by ratio fiber-coupled power aperture, fluctuates over time, and thus should be treated random variable. Previous theoretical works predict average efficiency accurately, but fail ...