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All-optical relay-assisted FSO systems

All-optical relay-assisted FSO systems

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In this chapter, an all-optical FSO relay-assisted system is proposed to mitigate the destructive effects of the distance-dependent AT-induced fading. Relays are inserted directly in the link in order to reduce the AT-induced link loss, thus extending the link span and ensuring higher link availability as well as improving the overall system performance. Two all-optical relaying schemes are proposed and investigated, namely all-optical amplify-and-forward (AOAF) and all-optical regenerate-and-forward (AORF) FSO relay-assisted approaches. For the AOAF approach, the performance analysis of triple-hop AOAF FSO communications is done under the impact of nonhomogeneous atmospheric turbulence. The AORF relaying approach is then proposed to overcome the limitation imposed by AOAF system, where the signal and noise are accumulated at each relay, thus limiting the number of relay nodes that can be used.

Chapter Contents:

  • 8.1 Introduction
  • 8.1.1 Fading mitigation techniques
  • 8.1.2 Relay-assisted FSO communications
  • 8.2 All-optical amplify-and-forward relay-assisted systems under turbulence effects
  • 8.2.1 All-optical amplify-and-forward
  • 8.2.1.1 Performance analysis of triple-hop AOAF FSO
  • 8.2.2 AOAF numerical analysis
  • 8.2.3 Experimental analysis for single, dual-hop, and triple-hop AF systems
  • 8.3 All-optical regenerate-and-forward relaying technique
  • 8.3.1 Self-phase modulation-based 2R regenerator
  • 8.3.2 Experimental analysis of AORF FSO
  • 8.4 Conclusions
  • References

Inspec keywords: atmospheric turbulence; free-space optical communication; fading; relay networks (telecommunication); amplify and forward communication; optical links; atmospheric light propagation

Other keywords: triple-hop AOAF FSO communications; nonhomogeneous atmospheric turbulence; all-optical amplify-and-forward FSO relay-assisted approach; all-optical regenerate-and-forward FSO relay-assisted approach; all-optical relaying schemes; distance-dependent AT-induced fading; AT-induced link loss; AORF relaying approach; all-optical relay-assisted FSO systems; free space optical communications

Subjects: Free-space optical links; Light propagation

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