free space optics

(redirected from Free space optical communications)

free space optics

A high-speed optical wireless communication system that transmits light pulses through the air using infrared lasers. Requiring line of site, free space optics (FSO) provides point-to-point and point-to-multipoint transmission without requiring a government license for use of the spectrum.

Because weather conditions such as fog can reflect light signals, redundant paths can be created by sending multiple signals to reflectors on different buildings. Transmitters with multiple beams are also used to provide greater reliability.

In time, free space optics is expected to be used for short distances within high-speed buses in computers and switches, perhaps even within the chip itself. See visible light communication.


Multi-Beam FSO Transceiver
This FlightSpectrum unit transmits 1.25 Gbps up to 3,000 meters and sends multiple beams for greater reliability. Approximately 1x1x2 feet in size, it connects to single mode and multimode fiber. (Image courtesy of Lightpointe, www.lightpointe.com)
References in periodicals archive ?
There is much discussion in the industry today regarding the use of free space optical communications equipment as an access technology into public networks, and so I believe it unfair to mislead your readers regarding the real capabilities of the products discussed in the article.
Advances are also being made in free space optical communications devices, also known as laser communications, which are harder to intercept than RF-based communications.
The contract is for Space Photonics to develop "Intelligent Free Space Optical Communications Node" prototypes for spacecraft.
In response to increasing demand for flat-top narrow bands for laser applications, Laser Components has added to its range of optical filters a new series of four-cavity Fabry-Perot narrowband filters, for demanding lidar, range-finding and free space optical communications applications.
Five years ago, the Lunar Laser Communications Demonstration (LLCD) changed the communications paradigm by demonstrating high-rate high-efficiency free space optical communications (FSOC) between a satellite orbiting the moon and a terrestrial ground terminal.
Summary: San Francisco (California) [USA], Dec 16 (ANI): Andhra Pradesh Information and Technology Minister Nara Lokesh said on Saturday that the Free Space Optical Communications (FSOC) technology to be brought in the state will enable the state to provide internet facility in rural areas and the tribal belt of the state.
San Francisco (California) [USA], Dec 16 ( ANI ): Andhra Pradesh Information and Technology Minister Nara Lokesh said on Saturday that the Free Space Optical Communications (FSOC) technology to be brought in the state will enable the state to provide internet facility in rural areas and the tribal belt of the state.
Wilkinson, "Aberration Correction for Free Space Optical Communications Using Rectangular Zernike Modal Wavefront Sensing".
In [1] the authors consider relay-assisted free space optical communications, and investigate the outage performance under serial and parallel scheme with amplify-and-forward (AF), and decode-and-forward (DF) relaying models.
The concept for free space optical communications has been around since the 1970s.
The LaserFire free space optical communications systems will be marketed for military and intelligence customers, according to a news release.
The fiber assemblies are also used in free space optical communications and other medical applications.