(Courtesy VeEX Inc.)Ĭlass 3B and 3R lasers are the next category with higher power levels. ![]() Class 2 visible lasers are used for short distance fiber tracing and troubleshooting applications. Hazard levels are assigned values from 1 to 4, based on the customary laser accessible emission limits (AEL). It isn’t until a fiber is broken or a connector is disconnected that a person may be exposed to laser radiation which may be potentially hazardous. Most fiber optic transmission systems are considered a Class 1 laser product because under normal conditions the laser emissions are completely enclosed and there are low power levels being transmitted. ![]() System, component and test equipment manufacturers must follow this standard with all lasers identified with the appropriate classification and optical power level for users to see. Virtually all FOC systems, OTDRs, and light sources, use laser diodes applicable to this standard which divides laser devices into 4 classes and several sub-classes, depending upon the combination of wavelength, intensity, beam divergence, and exposure time. In this month’s column, I’ll address laser safety applicable to fiber optic communication systems (FOCS) while specifically addressing the "American National Standard for the Safe use of Optical Fiber Communication Systems Utilizing Laser Diode and LED Sources" (ANSI Z136.2). ![]() ![]() Safety should always be a major element of any organization’s culture.
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