Combined Effect of Turbulence and Aerosol on Free Space Optical Links

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00305229" target="_blank" >RIV/68407700:21230/17:00305229 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1364/AO.56.000336" target="_blank" >http://dx.doi.org/10.1364/AO.56.000336</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/AO.56.000336" target="_blank" >10.1364/AO.56.000336</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Combined Effect of Turbulence and Aerosol on Free Space Optical Links

Popis výsledku v původním jazyce

Despite the benefits of free-space optical (FSO) communications, their full utilization is limited by the influence of atmosphere weather conditions. Such as fog, turbulence, smoke, snow and others. In urban environments, additional environmental factor such as smog and dust particles due to air pollution caused by the industry and motor vehicles may affect the FSO link performance, which has not been investigated in detail yet. Both smog and dust particles cause absorption and scattering of the propagating optical signal, thus resulting in high attenuation. This work investigates the joint impact of the atmospheric turbulence and dust particle imposed scattering on the FSO link performance as part of the last mile access network in urban areas. Propagation of an optical wave is at first analyzed based on the micro-physic approach and the extinction caused by small particles is determined. An experimental measurement campaign using a dedicated test chamber is carried out to assess the FSO link performance operating wavelengths of 650 and 830 nm and under the dust and turbulent conditions. The measured attenuation and the Q-factor in terms of the velocity of particle flow and the turbulence strength are analyzed. We show that for an air flow of 2 m/s the Q-factor is almost 3.5 higher at the wavelength of 830 nm than at 670 nm. However, for wavelength of 670 nm the FSO link is less affected by the increase in airflow compared to 830 nm. The Q-factor reduces with turbulence. Under similar turbulence conditions, for the ash particles the Q-factor is higher than that of sand particles.

Název v anglickém jazyce

Combined Effect of Turbulence and Aerosol on Free Space Optical Links

Popis výsledku anglicky

Despite the benefits of free-space optical (FSO) communications, their full utilization is limited by the influence of atmosphere weather conditions. Such as fog, turbulence, smoke, snow and others. In urban environments, additional environmental factor such as smog and dust particles due to air pollution caused by the industry and motor vehicles may affect the FSO link performance, which has not been investigated in detail yet. Both smog and dust particles cause absorption and scattering of the propagating optical signal, thus resulting in high attenuation. This work investigates the joint impact of the atmospheric turbulence and dust particle imposed scattering on the FSO link performance as part of the last mile access network in urban areas. Propagation of an optical wave is at first analyzed based on the micro-physic approach and the extinction caused by small particles is determined. An experimental measurement campaign using a dedicated test chamber is carried out to assess the FSO link performance operating wavelengths of 650 and 830 nm and under the dust and turbulent conditions. The measured attenuation and the Q-factor in terms of the velocity of particle flow and the turbulence strength are analyzed. We show that for an air flow of 2 m/s the Q-factor is almost 3.5 higher at the wavelength of 830 nm than at 670 nm. However, for wavelength of 670 nm the FSO link is less affected by the increase in airflow compared to 830 nm. The Q-factor reduces with turbulence. Under similar turbulence conditions, for the ash particles the Q-factor is higher than that of sand particles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Optics

ISSN

1559-128X

e-ISSN

2155-3165

Svazek periodika

56

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

336-341

Kód UT WoS článku

000392097500029

EID výsledku v databázi Scopus

2-s2.0-85009786974