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Safety
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Laser classes
The maximum output power of laser radiation depends on the type of laser diode used.
The international standards IEC-60825 or DIN/EN 60825 define the maximum output
power of laser radiation for each laser class in accordance with the wavelength.
Table 1-1 Laser classes
Laser class
1
3A
3B
Hazard level assignment
Hazard level refers to the potential hazard from laser emission at any location in an
end-to-end optical fiber communication system that may be accessible during service or in
the event of a failure. The assignment of hazard level uses the AELs for the classes.
Hazard levels for optical transmission equipment are assigned in either of the following
two ways:
Actual output power from the connector or fiber cut.
•
If automatic power reduction is used, output power at the connector or fiber cut at one
•
second after automatic power reduction takes place provided that maximum output
and restart conditions are met.
Classification of optical telecommunication equipment
Optical telecommunication equipment is generally classified as IEC Class 1 or
FDA/CDRH Class I, because under normal operating conditions, the transmitter ports
terminate on optical fiber connectors. These are covered by a front panel to ensure
protection against emissions from any energized, unterminated transmitter. The circuit
packs themselves, however, may be IEC Class 1 or 3A or FDA/CDRH Class I or IIIb.
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365-372-603R2.0
Issue 1 January 2009
Maximum output power
Wavelength
of laser radiation
1310 nm
8.85 mW
1550 nm
10 mW
1310 nm
24 mW
1550 nm
50 mW
1310 nm
0.5 W
1550 nm
0.5 W
Laser product classification
1 - 1 1
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