Fiber Optic Cable

Fiber optics is composed of microscopic strands of glass. Information in the form of bytes of data can travel through this glass at the speed of light. The fiber optic strands of glass are enclosed inside tubes which are protected by several layers, including KevlarŪ, the same material used in bullet-proof jackets.

Single Mode Fiber Optic Cable
Primarily used as an interbuilding backbone cable. At distances up to 3 km., single mode fiber will deliver data rates up to 10 Gbps. with a bandwidth of 20Ghz. Its operating wavelengths are 1310 nm and 1550 nm. Single mode fiber's primary uses are long distance applications, full motion video, and any applications requiring extremely high bandwidth.

Multimode Fiber Optic Cable
As an interbuilding backbone cable at distances of under 2 km, multimode fiber optic cable will deliver data rates up to 200 Mbps. Its operating wavelengths are 850 nm and 1300 nm. In addition, multimode fiber optic cable can be used in intrabuilding distribution. For distances of 100 m or less the bandwidth is virtually unlimited. At an operating wavelength of 850 nm, 62.5/125 um multimode fiber has a bandwidth of 100-200 MHz·km., with an attenuation of 3.0 to 5.0 dB/km. At an operating wavelength of 1300 nm, 62.5/125 um multimode fiber has a bandwidth of 200-800 MHz·km., with an attenuation of 0.9 to 3.0 dB/km. Multimode fiber is used for voice, data, security and video systems.

Always follow manufacturers electronic equipment specifications for fiber core size when designing a fiber optic system. However, contact a manufacturers representative if the specifications differ from 62.5/125 um. In most cases 62.5/125 um will be acceptable.

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