23
Table 9
Characteristics of single mode and multi-mode optical fibers
Single mode fiber
Multi-mode fiber
Core
Small core (10 micrometers or less)
Larger core than single mode fiber
(50 micrometers, 62.5
micrometers or greater)
Dispersion Less
dispersion
Allows greater dispersion and
therefore, signal loss exists.
Light source and transmission
distance
Users lasers as the light source
often within campus backbones for
distance of several thousand
meters
Uses LEDs as the light source often
within LANs or distances of a
couple hundred meters within a
campus network
Table 10
Allowed maximum tensile force and crush load
Period of force
Tensile load (N)
Crush load (N/mm)
Short period
150
500
Long term
80
100
Fiber connectors are indispensable passive components in an optical fiber communication system. They
allow the removable connection between optical channels, which makes the optical system debugging
and maintenance more convenient. There are multiple types of fiber connectors.
shows an LC
connector.
Figure 26
Appearance of an LC connector