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Proceedings Paper

Free space optics for transmission links in GSM networks
Author(s): Constantin Gheorghe; Paul Şchiopu
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Paper Abstract

Free Space Optics (FSO) refers to the transmission of modulated visible or infrared (IR) beams through the atmosphere to obtain broadband communications. As long as there is a clear line of sight between the source and the destination, and enough transmitter power, communication is theoretically possible. FSO uses lasers to transmit data through the air rather than guided through an optical fiber. FSO technology requires no government licensing and can be readily deployed within hours of the availability of line-of-sight access. Systems capacities, for the available systems, are in the range of 100 Mbps to 2.5 Gbps. There have been reported systems with data rates as high as 160 Gbps. FSO is far more secure than Radio Frequency or other wireless-based transmission technologies for several reasons: (1) laser beams cannot be detected with spectrum analyzers; (2) laser transmissions are optical and travel along a line of sight path that cannot be intercepted easily; (3) the laser beams generated by FSO systems are narrow and invisible, making them harder to find and even harder to intercept and crack. This paper contains a detailed comparative analysis between the traditional radio links and Free Space Optics links. We present the advantages and challenges of FSO, the availability, capacity and transmission related issues.

Paper Details

Date Published: 7 December 2010
PDF: 7 pages
Proc. SPIE 7821, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V, 78212C (7 December 2010); doi: 10.1117/12.882507
Show Author Affiliations
Constantin Gheorghe, Politehnica Univ. of Bucharest (Romania)
Paul Şchiopu, Politehnica Univ. of Bucharest (Romania)


Published in SPIE Proceedings Vol. 7821:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies V
Paul Schiopu; George Caruntu, Editor(s)

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