EDFA-based all-optical relaying in free-space optical systems
Bayaki E, Michalopoulos DS, Schober R (2012)
Publication Type: Journal article
Publication year: 2012
Journal
Book Volume: 60
Pages Range: 3797-3807
Article Number: 6302113
Journal Issue: 12
DOI: 10.1109/TCOMM.2012.090512.110198
Abstract
Free-space optical (FSO) communication has recently gained a lot of interest for last-mile terrestrial applications. Some of its advantages include high data rates, ease of deployment, license-free operation, and high security. However, the weather-dependent optical wireless channel introduces attenuation and intensity variations known as scintillation which impose severe challenges for reliable data transmission. The distance dependence of both attenuation and scintillation motivates the use of relays as a means of improving the system performance and extending the range of communication. In this paper, we advocate the use of all-optical relays equipped with erbium-doped fiber amplifiers (EDFAs), which, in contrast to conventional FSO relays with electrical amplification, avoid optical-to-electrical and electrical-to-optical conversions. We develop accurate signal and noise models for fixed and variable gain all-optical and electrical relaying which include the effects of all relevant system parameters and types of noise. For performance evaluation, we analyze the outage probability of all-optical relaying in lognormal fading for dual-hop and multi-hop transmission. Our results show that all-optical relays, while simpler from an implementation point of view, outperform electrical relays unless the number of relays is very large. Moreover, for a fixed source-destination distance, performance improves as the number of hops (relays) increases up to a certain point beyond which adding more hops deteriorates performance. © 2012 IEEE.
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APA:
Bayaki, E., Michalopoulos, D.S., & Schober, R. (2012). EDFA-based all-optical relaying in free-space optical systems. IEEE Transactions on Communications, 60(12), 3797-3807. https://doi.org/10.1109/TCOMM.2012.090512.110198
MLA:
Bayaki, Ehsan, Diomidis S. Michalopoulos, and Robert Schober. "EDFA-based all-optical relaying in free-space optical systems." IEEE Transactions on Communications 60.12 (2012): 3797-3807.
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