Lucent Technologies LambdaUnite Manual De Seguridad página 23

Hazard level assignment
Classification of optical
telecommunication
equipment
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365-374-138A4
Issue 1, November 2003
In earlier editions of the IEC 60825 standard the following laser classes
and corresponding power limits were defined for wavelengths of
1310 nm and 1550 nm:
Laser class Wavelength
1310 nm
1
1550 nm
1310 nm
3A
1550 nm
1310 nm
3B
1550 nm
1310 nm
4
1550 nm
Notes:
1 Corresponding laser warning labels can still be found on equipment
manufactured before publication of the IEC 60825-1 Ed. 1.2 (2001)
standard.
"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:
• the actual output power from the connector or fiber cut.
• if automatic power reduction is used, the 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.
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.
The circuit packs themselves, however, may be IEC Class 1 or Class 1M
or FDA/CDRH Class I or Class IIIb.
Max. output power of laser
radiation
8.85 mW +9.5 dBm
10 mW +10 dBm
24 mW +13.8 dBm
50 mW +17 dBm
500 mW +27 dBm
500 mW +27 dBm
> 500 mW > +27 dBm
> 500 mW > +27 dBm
EN: Safety guide
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