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Free Space Optics

Free Space Optics

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Product Details

Telecommunication network free space optics communications pcba motherboards assembly electronics contract manufacturing services OEM CEM EMS experience companyChina Shenzhen Topscom

Free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. "Free space" means air, outer space, vacuum, or something similar. This contrasts with using solids such as optical fiber cable or an optical transmission line. The technology is useful where the physical connections are impractical due to high costs or other considerations.

Engineering details:

Typically, best use scenarios for this technology are: 

LAN-to-LAN connections on campuses at Fast Ethernet or Gigabit Ethernet speeds

LAN-to-LAN connections in a city, a metropolitan area network

To cross a public road or other barriers which the sender and receiver do not own

Speedy service delivery of high-bandwidth access to optical fiber networks

Converged Voice-Data-Connection

Temporary network installation (for events or other purposes)

Reestablish high-speed connection quickly (disaster recovery)

As an alternative or upgrade add-on to existing wireless technologies

Especially powerful in combination with auto aiming systems, this way you could power moving cars or you can power your laptop while you move or use auto-aiming nodes to create a network with other nodes.

As a safety add-on for important fiber connections (redundancy)

For communications between spacecraft, including elements of a satellite constellation

For inter- and intra -chip communication.

The light beam can be very narrow, which makes FSO hard to intercept, improving security. In any case, it is comparatively easy to encrypt any data traveling across the FSO connection for additional security. FSO provides vastly improved electromagnetic interference (EMI) behavior compared to using microwaves. 

Technical advantages:

Ease of deployment

Can be used to power devices

License-free long-range operation (in contrast with radio communication)

High bit rates

Low bit error rates

Immunity to electromagnetic interference

Full duplex operation

Protocol transparency

Increased security when working with narrow beam(s)[citation needed]

No Fresnel zone necessary

Reference open source implementation

Range limiting factors

For terrestrial applications, the principal limiting factors are: 

Fog (10..~100 dB/km attenuation)

Beam dispersion

Atmospheric absorption

Rain

Snow

Terrestrial scintillation

Interference from background light sources (including the Sun)

Shadowing

Pointing stability in wind

Pollution / smog

These factors cause an attenuated receiver signal and lead to higher bit error ratio (BER). To overcome these issues, vendors found some solutions, like multi-beam or multi-path architectures, which use more than one sender and more than one receiver. Some state-of-the-art devices also have larger fade margin (extra power, reserved for rain, smog, fog). To keep an eye-safe environment, good FSO systems have a limited laser power density and support laser classes 1 or 1M. Atmospheric and fog attenuation, which are exponential in nature, limit practical range of FSO devices to several kilometres.

Topscom Technology is one of the leading manufacturers and suppliers who is committed to provide customers high quality and customized free space optics. Our factory can also give you wholesale service which is made in China, welcome to get free space optics with us.

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