Table of Contents
Advertisement
Table 4: Multimode fiber specifications
Interface types
1000BASE-SX
10GBASE-SR
10GBASE-LRM
1
LRM technology requires a PHY behind the SFP port. Not all 10G SFP (or higher) can support the use of a 10G LRM
transceiver. Check the compatibility chart for your switch series to see if 10G LRM is supported.
• Single-mode fibers
Single-mode fibers (SMFs) have a small core size, typically 9 μm or 10 μm, and can transmit light in only
one mode. Single-mode fibers suffer little intermodal dispersion and are suitable for long-haul
communication. Single-mode fibers transmit light at the central wavelength of 1310 nm or 1550 nm.
Telecommunication Industries Alliance (TIA)/Electronic Industries Alliance (EIA) defines that single-mode
fibers use yellow outer jackets with the mark "SM".
ITU defines single-mode fiber types in its G series standards. The most commonly used single-mode
fibers are defined in ITU G.652 and G.655 standards. The following table describes features of the G.652
and G.655-compliant fibers.
Table 5: Features of G.652- and G.655-compliant fibers
Single-mode fiber
type
G.652-compliant
fiber (standard
single-mode fiber)
G.655-compliant
fiber (non-zero
dispersion shifted
fiber)
Chapter 1 Overview
Central wavelength
(nm)
850
850
1
1310
Wavelength (nm)
1260 to 1360
1530 to 1565
1530 to 1565
Fiber grade
OM1
OM2
OM1
OM2
OM3
OM4
OM1
OM2
OM3
OM4
SMF
Features
Zero dispersion at 1310 nm
Near-zero dispersion
around 1550 nm
Transmission distance
< 275 m (902.23 ft)
< 550 m (1804.46 ft)
< 33 m (108.27 ft)
< 82 m (269.03 ft)
< 300 m (984.25 ft)
< 400m (1312.34 ft)
< 220 m (721.78 ft)
< 220 m (721.78 ft)
< 220 m (721.78 ft)
< 220 m (721.78 ft)
<300m (987.25 ft)
Applications
Connecting transceiver
modules with a central
wavelength of 1310 nm or
1550 nm.
For 1550 nm wavelength-
division multiplexing (WDM)
transmissions.
9
Advertisement
Table of Contents
