FSO Frequently Asked Questions - FAQ

Laser Safety and FSO

Free Space Optical systems contain high-power optical transmission devices.  Such products are classified internationally by two standards bodies, the IEC (Europe) and FDA (Food and Drugs Administration - USA).

The minimum acceptable classification for FSO systems is Class 1M.  Systems classified as Class 3b or above are dangerous, and should not be used in public places.

The unprotected eye is sensitive to laser radiation and can be permanently damaged from direct or reflected beams. The site of ocular damage for any given laser depends upon its output wavelength, and the risk level on the output power and beam configuration.

Applicable safety standards for the human eye per the following standards:

• International Laser Standard IEC 60825-1/A2:2001

• European Standard EN 60825-1/A2:2000, DIN VDE 0837-1/A2

• IEC/EN 60825-7:1998

• DIN V VDE V 0837-7:1999

• US user Standard ANSI Z 136.1, CDRH 21 DRF

There are three elements which affect the degree of exposure:

1) Distance from the source
2) How much time is spent staring into the beam
3) Whether you are looking through a device which magnifies the beam (telescope or binoculars)

In summary, FSO systems with Class 1 or 1M are safe to use in public places.  Any systems marked 'Class 3B' or higher are not safe.

If you sell or install products which are marked 'Class 3B' in public places, you are taking a serious risk which may include impounding of equipment, prosecution, and charges of negligence.

To find out more, please visit:
FSO Primer
FSO Technology
FSO Guide
FSO Comparisons
FSO Laser Guide
FSO Products
FSO Applications
FSO Glossary
FSO FAQ
FSO Technology FAQ
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