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Advantages: longer distances without amplification; higher bandwidth; no problems with electromagnetic interference. Disadvantages: more expensive; more difficult to install (should only be done by specially trained people).
Advantages: longer distances without amplification; higher bandwidth; no problems with electromagnetic interference. Disadvantages: more expensive; more difficult to install (should only be done by specially trained people).
Advantages: longer distances without amplification; higher bandwidth; no problems with electromagnetic interference. Disadvantages: more expensive; more difficult to install (should only be done by specially trained people).
Advantages: longer distances without amplification; higher bandwidth; no problems with electromagnetic interference. Disadvantages: more expensive; more difficult to install (should only be done by specially trained people).
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoMulti-mode fiber has higher "light-gathering" capacity than single-mode optical fiber. In practical terms, the larger core size simplifies connections and also allows the use of lower-cost electronics such as light-emitting diodes (LEDs) and vertical-cavity surface-emitting lasers (VCSELs) which operate at the 850 nm and 1300 nm wavelength (single-mode fibers used in telecommunications operate at 1310 or 1550 nm and require more expensive laser sources. Single mode fibers exist for nearly all visible wavelengths of light).[2] However, compared to single-mode fibers, the limit on speed times distance is lower. Because multi-mode fiber has a larger core-size than single-mode fiber, it supports more than one propagation mode; hence it is limited by modal dispersion, while single mode is not. The LED light sources sometimes used with multi-mode fiber produce a range of wavelengths and these each propagate at different speeds. In contrast, the lasers used to drive single-mode fibers produce coherent light of a single wavelength. This chromatic dispersion is another limit to the useful length for multi-mode fiber optic cable. Because of their larger core size, multi-mode fibers have higher numerical apertures which means they are better at collecting light than single-mode fibers. Due to the modal dispersion in the fiber, multi-mode fiber has higher pulse spreading rates than single mode fiber, limiting multi-mode fiber's information transmission capacity.
Single-mode fibers are most often used in high-precision scientific research because the allowance of only one propagation mode of the light makes the light easier to focus properly.
Wiki User
∙ 14y agoAdvantages: longer distances without amplification; higher bandwidth; no problems with electromagnetic interference. Disadvantages: more expensive; more difficult to install (should only be done by specially trained people).
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