Free-space optics optimization models for building sway and atmospheric interference using variable wavelength

The performance of free-space optics (FSO) communication systems are affected by building sway and atmospheric interference. These adverse effects can be mitigated by appropriately adjusting the system parameters. In this paper, two optimization models are established and solved. The desirable transmitter power, transmitter wavelength, transmitter telescope gain, and receiver telescope gain can be determined accordingly. The solution feasibility relies on using the quantum cascade laser (QCL) in transmitters. Details of the numerical experiments are also reported.