CONNECTING in the Broadest Sense

Kwek Keong
March 2007
InTech;Mar2007, Vol. 54 Issue 3, p48
The article analyzes the advantages and disadvantages of free space optics (FSO). It uses infrared light-emitting-diodes to allow optical wireless exchange of data, voice and video. Up to 10Gbps are used through the air from 20 meters to 5 kilometers without the need to lay cables and radio frequency spectrum licenses. FSO is cheaper and easier to install and maintain than fiber optics. It is also difficult to intercept and to jam. However, FSO is subject to environmental variations such as fog, absorption, scintillation, scattering and building sway or earthquakes.


Related Articles

  • UVOC-MAC: a MAC protocol for outdoor ultraviolet networks. Li, Yiyang; Ning, Jianxia; Xu, Zhengyuan; Krishnamurthy, Srikanth; Chen, Gang // Wireless Networks (10220038);Aug2013, Vol. 19 Issue 6, p1101 

    As an alternative to radio-frequency (RF) communications, optical wireless communications can support high data rates and low power operations while providing good jamming resistance. Our focus in this paper is on deep ultraviolet (UV) outdoor communications (UVOC) where solar blind and...

  • `Inside' Story On New Buildout. Smith, Brad // Wireless Week;01/10/2000, Vol. 6 Issue 2, p16 

    Focuses on the installation of microcells, fiber optics and an in-building network of small hubs and antennas in penetrating concrete and steel structures that hampers radio frequencies. Information a deal signed by Safeco Inc. with AWS parent AT&T Corp.; Comments from John Spindler, LGC...

  • Hacia la próxima generación de sistemas de Radio sobre Fibra de banda ancha: retos tecnológicos en la banda de las ondas milimétricas. Granada Torres, Jhon James; Serpa Imbett, Claudia Milena; Varón Durán, Gloria Margarita; González, Neil Guerrero // Ingeniería y Desarrollo;jul-dic2011, Vol. 2 Issue 29, p242 

    In this paper, we present a review based in the most relevant scientific works of radio-over-fiber technology. The most important issues of the state-of-the-art evolution are exposed. We show a description of the main devices and the most recent experimental tests that suggest the integration...

  • LIGHT YEARS AHEAD. Halverson, Matthew // EC&M Electrical Construction & Maintenance;Apr2002, Vol. 101 Issue 4, p16 

    Focuses on the use of light emitting diodes and fiber optic for lighting. Production of a mixture of wavelengths; Improvement of lumens per watt output; Emphasis on the low-maintenance nature of fiber optics.

  • Fiber optics. Farndon, John // Science (1-59084-471-8);2003, p26 

    Fiber optic cables are bundles of transparent glass threads that transmit messages by light in coded pulses. The cladding that surrounds each fiber stops light from escaping by total internal reflection. There are single-mode fibers that use a laser beam and multi-mode fibers that accept...

  • Recent progress in bidirectional interrogation techniques for enhancing multiplexing capability of fiber optic white light interferometric sensors. Libo Yuan; Limin Zhou; Wei Jin // Review of Scientific Instruments;Nov2003, Vol. 74 Issue 11, p4893 

    In smart structure applications where fiber sensors are embedded within structural materials, multiple lead in/out fibers are preferred for redundancy and improving reliability. The use of only one lead/out fiber is not optimal because the breakage of a fiber at one location due to, for example,...

  • VISIBLE LIGHT COMMUNICATIONS: Light reading. Zolfagharifard, Ellie // Engineer (Online Edition);2/14/2011, p20 

    The article offers information on the technology, Visible Light Communications (VLC) which has the potential to encode data through light-emitting diodes (LEDs). It further informs that VLC does not interfere with radio-frequency (RF) electronics which makes it suitable for use in hospitals and...

  • Innovation--No excuses. Holton, W. Conard // Vision Systems Design;Jan2011, Vol. 16 Issue 1, p5 

    The article discusses various reports published within the issue, including one on how innovations in high-brightness, long-life light-emitting diode (LED) technology have had a significant impact on the development of fiber-optic illumination systems and another on the railway infrastructure...

  • Laboratory Session on Interfaces and Data Acquisition. Vergara-Limon, S.; Vargas-Treviño, M. A.; Sheaff, M. // AIP Conference Proceedings;2003, Vol. 674 Issue 1, p223 

    This is a course to introduce the students to a basic optical link. An optical link has three main components, each with a specific function. The transmitter contains a light source, e.g., a light-emitting diode (LED), an edge-emitting laser diode (LD), or a vertical cavity surface-emitting...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics