nanog mailing list archives
Re: Eye protection in DWDM systems -- what threshold?
From: Joel Jaeggli <joelja () bogus com>
Date: Mon, 08 Jun 2009 22:25:24 -0700
There are erbium doped raman lasers with output of up to 10 watts continuous wave, they are (obviously) class 4 devices and are considered hazardous. 3r and 3b emitters shouldn't be directly exposed to the eye, and carry an appropriate warnings. the 10-80km stuff should all be 1 or 1m and does't merit the yellow triangle. 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
Current thread:
- Eye protection in DWDM systems -- what threshold? Deepak Jain (Jun 08)
- Re: Eye protection in DWDM systems -- what threshold? Joel Jaeggli (Jun 08)
- Re: Eye protection in DWDM systems -- what threshold? Kevin Hodle (Jun 08)
- Re: Eye protection in DWDM systems -- what threshold? Mikael Abrahamsson (Jun 08)
- Re: Eye protection in DWDM systems -- what threshold? David Freedman (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Robert E. Seastrom (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Jeff Kell (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Patrick W. Gilmore (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Richard A Steenbergen (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Patrick W. Gilmore (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Leo Bicknell (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Deepak Jain (Jun 09)
- Re: Eye protection in DWDM systems -- what threshold? Jeff Kell (Jun 09)