8 laser safety, 9 passive laser equipment safety – MRV Communications EM316SW-XY User Manual
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Fiber Driver
®
EM316SW-XY
1.8 Laser Safety
WARNING: Do not open laser devices for service. Removing the cover may cause exposure 
to harmful laser beams. Return defective laser devices to the vendor for service. 
WARNING: Un-terminated connectors or fiber cable ends may emit invisible laser radiation. 
Do not view them directly with optical instruments such as eye loupes, magnifiers, or 
microscopes. The amplified laser output can dramatically increase eye hazard. 
WARNING: This equipment is intended for use with Class 1 pluggable (SFP, XFP, 
GBIC)fiber optics transceivers that carry a label indicating the following specifications: 
– Classification as a Class 1 Laser product. 
– Compliance with Food and Drugs Administration Center for Radiological Health (FDA 
CDRH) performance standards, 21 CFR, 1040.10, and 1040.11.
– Certification from Nationally Recognized Testing Laboratory (NRTL), CSA, or TUV.
WARNING: Some fiber optics modules (EM316EDFA) may contain Class 1M levels of 
invisible laser radiation. Class 1M equipment must be installed in a restricted location that is 
only accessible to authorized personnel with laser safety training. 
WARNING: Laser products labeled as Class 1M may have internal laser diodes containing 
Class 3B lasers. 
 
 
1.9 Passive Laser Equipment Safety
 
Passive devices require no external power source for operation. Although these devices may be 
deployed anywhere a fiber cable may be routed, access to the fiber ends and connections constitutes 
potential risks with live laser transmissions. The passive equipment is intended for add/drop and 
multiplex/de-multiplex networking with multiple Class 1 laser fiber signals mapping to one signal of 
CWDM (1,310nm to 1,610nm), DWDM (1,520nm to 1565nm), and add/drop modules. 
 
Measure or calculate risk potential separately for skin and retinal hazards, with care not to exceed the 
Class 1 laser hazard level (10 dbm). See IEC 60825-2 for details. 
 
IEC 60825-2, D.5.1 - Aggregated Wavelengths on a Fiber (summary) 
 
When more than one wavelength is combined on the same fiber as in a WDM system, then the 
hazard level depends on aggregated power levels. Hazards are always cumulative for exposure to 
wavelengths usually used in optical fiber communication systems. 
 
WARNING: Only trained and qualified personnel (IEC 60950-1) should install, replace, or 
service passive equipment. 
WARNING: These passive optical devices are intended for connecting Class 1 laser inputs 
only. Use of other than Class 1 laser inputs may result in equipment damage or hazardous 
radiation exposure on the equipment output. 
WARNING: Un-terminated connectors or fiber cable ends may emit invisible laser radiation. 
Do not view directly with optical instruments such as eye loupes, magnifiers, or microscopes 
because the amplified light can damage eyes. 
 
 PN 1288003-001, Rev D2 
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