Type of fiber optic cable to use in SAN connectivity.
Category: General Information
Date Posted: 03/06/08
Should 50 micron fibre patch cables be used instead of 65 micron for SAN connectivity?
Could you elaborate on the different uses of the two different sized multi-mode fibre products and their use?
The use of 50 or 62.5 micron fiber cable depends upon application speed and bandwidth required
at a given optical wavelength. e.g. if you are running at gigabit speed fiber bandwidth and wavelengths need to be considered.
1. Gigabit @ 850nm ->50 micron - 600 meters
Gigabit @ 850nm->62.5 micron - 300 meters
2. Gigabit @ 1300nm->50 micron - 600 meters
Gigabit @ 1300nm->62.5 micron - 550 meters
There is a new 50 micron fiber that is laser optimized for best results. As
you can see, selection of fiber size will depend upon:
1. End equipment wavelength - 850 or 1300 nm
2. How far you need to go
If all this is ok, additional consideration is based on loss or fiber
attenuation at given wavelength.
1. 850nm - 50 micron - 3 dB/Km
850nm - 62.5 micron - 3.5 dB/Km
2. 1300nm - 50 micron - 1 dB/Km
1300nm - 62.5 micron - 1 dB/Km
If you plan to go long distance with high speed, we suggest use of single mode fiber. Single mode fiber has a very high bandwidth and loss is only
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