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Advanced Free Space Optics (FSO) pp 177–202Cite as

Non-Line-Of-Sight (NLOS) Ultraviolet And Indoor Free-Space Optical (FSO) Communications

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Part of the book series: Springer Series in Optical Sciences ((SSOS,volume 186))

Abstract

This chapter presents a new concept for exploiting non-line-of-sight (NLOS) free-space optical (FSO) communication. NLOS configuration can be achieved using scattering as a vehicle for a viable link, or using multipath propagation as in an indoor optical communication link. The chapter discusses the promising enabling technology of ultraviolet (UV) NLOS optical wireless communication. The chapter describes a stochastic NLOS UV communication channel model using a Monte Carlo simulation method based on photon tracing starting with key system components. An overview of the state-of-the-art devices such as deep UV light-emitting diodes (LEDs) and solid state solar-blind deep UV avalanche photodiodes (APDs), solar blind photomultipliers (PMTs), filters which are well-suited for NLOS UV FSO communication is given. Most recent experimental results with various modulation formats described in this chapter supports the potential promise of this technology for NLOS operation. Extending this enabling technology to design NLOS FSO-based distributed sensor network in multi-scattering channel is also discussed. The possibility of NLOS quantum communication using UV photons is also pointed out. This chapter introduces another related NLOS FSO link for indoor inter-device connectivity using near infrared light. Possible configurations for indoor optical wireless systems include: (i) directed beam infrared (DBIR), (ii) diffuse infrared (DFIR), and (iii) quasi-diffuse infrared (QDIR). Some of the discussions in this chapter include propagation modeling (with multipath response), different modulation techniques suitable for different configurations, multi-access techniques, and broadband communication links for multiple sensor networks. The impact of this new technology on future FSO links and various applications is addressed.

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  1. 105 W. Mojave Rose Ave., 93555, Ridgecrest, CA, USA

    Arun K. Majumdar

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Majumdar, A. (2015). Non-Line-Of-Sight (NLOS) Ultraviolet And Indoor Free-Space Optical (FSO) Communications. In: Advanced Free Space Optics (FSO). Springer Series in Optical Sciences, vol 186. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-0918-6_5

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  • DOI: https://doi.org/10.1007/978-1-4939-0918-6_5

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4939-0917-9

  • Online ISBN: 978-1-4939-0918-6

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