NDLI: Performance of free space optical links in presence of turbulence, pointing errors and adverse weather conditions

Content Provider	Springer Nature Link
Author	Kaur, Prabhmandeep Jain, Virander Kumar Kar, Subrat
Copyright Year	2015
Abstract	The ergodic capacity, bit error rate (BER) and outage probability of a free space optical communication link is analyzed in the presence of gamma–gamma distributed turbulence and pointing errors in presence of various weather conditions viz., very clear air, drizzle, haze and fog. It is seen that the capacity decreases, BER and outage probability increase as the pointing error jitter increases. The worst degradation of the above performance parameters occurs in fog conditions while very clear air conditions give the least degradation. Further, the effect of varying beam divergence angle/beam waist is studied. It is observed that the beam divergence angle/beam waist can be optimized to attain maximum capacity, minimum BER and outage probability. The optimum value depends on the normalized pointing error jitter and increases with increasing jitter. However, for a fixed value of normalized jitter, it is independent of the weather conditions. Also, the system performance is more susceptible to channel impairments for beam divergence angles lower than the optimum value as compared to larger angles.
Starting Page	1
Ending Page	13
Page Count	13
File Format	PDF
ISSN	03068919
Journal	Optical and Quantum Electronics
Volume Number	48
Issue Number	1
e-ISSN	1572817X
Language	English
Publisher	Springer US
Publisher Date	2015-12-23
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atmospheric attenuation Free space optical (FSO) communication Gamma–gamma distribution Pointing errors Turbulence Optics, Optoelectronics, Plasmonics and Optical Devices Electrical Engineering Characterization and Evaluation of Materials Computer Communication Networks
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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