Eye protection in DWDM systems -- what threshold?

Tue Jun 9 10:43:02 UTC 2009

I forget who the vendor is now, but their shelves are sealed with a door
which, when opened, turns off all the lasers on the shelf so you can
work on it, yes, a simple provisioning operation causes an outage /
protection switchover!!

Dave.

Deepak Jain wrote:
> At what power level do DWDM systems become dangerous to work near (i.e. not staring into any optics, using light meters, etc)? I never see technicians on inside DWDM systems using eye protection, but I see power levels of amps going higher and higher. On a recent meter I saw almost .6mW... 
> 
> Any pointers to a document saying 1550nm becomes dangerous at xxxx dbM?
> 
> Thanks in advance,
> 
> DJ
> 