Measurement of turbulences influence on the laser beam polarization state

Abstract

This article is dealing with evaluation of air turbulences influence on the laser beam in the simulation box with regards to change of beam polarization state. For measurement the laser optical source LDM1550 operating at 1550 nm and polarimeter PAX5710 were used. The laser source was placed in front of simulation box that served for generation of stable turbulent environment. The simulation of turbulent environment was generated by high-speed ventilators PMD1212PMB1-A. The thermal turbulences were created by Empire CTH-5000 and Solac TH 8325 heaters. All heaters were placed along the side of simulation box. With the help of polarimeter and detector PAN5710IR3 were then subsequently recorded changes of polarization state of the optical beam with regards to changes of turbulence condition within the box. The results are then discussed and interpreted with the help of statistic methods in the end of the article.

Measurements of indoor/outdoor atmospheric turbulence through optical triangulation method

“…For free space optics (FSO), the consequence of this effect is optical beam misalignment and variation in the optical power that reaches the receiver. This may increase the bit error rate (BER) and consequently cause loss of information [4,5]. In this way, the evaluation of atmospheric turbulence by tracking the beam allows the possibility of mitigating the signal degradation even using neural network algorithms [6].…”