Question
Download Solution PDFFibre cables used for 'Fibre to Home' installations are _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFSingle mode fiber cables are used in home installations.
Types of Fiber cables
1.) Single mode fiber
- It has a much smaller core size of 9 microns and has a single light path and can travel much longer distances of up to 100km.
- Single-mode fiber features only one transmission mode.
- Compared with multi-mode fiber, it can carry higher bandwidths; however, it needs to have a light source having a narrow spectral width.
- These require more expensive electronics which operate in the 1310 and 1550nm windows and are typically used in longer distance LAN’s, Cable TV and telephony applications.
2.) Multimode fiber
- It can carry multiple light rays (modes) at the same time by having varying optical properties at the core; essentially light travelling the shortest path (down the middle) travels the slowest.
- The larger core simplifies connections and takes advantage of the lower cost LED & VCSEL technologies which operate in the 850nm window.
- Due to dispersion the range is limited so it tends to be used as premises cabling when less than a kilometer..
- It comes in two core sizes, 62.5 and 50 microns.
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