Magnus Danielson wrote: > From: Scott Mace <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] sub cables > Date: Thu, 01 May 2008 16:30:43 -0500 > Message-ID: <[EMAIL PROTECTED]> > > >> A repeater or regen goes optical-electrical-optical. I think you are >> talking about an EDFA. While it may pass light when it's down, one >> has to take into account the optical budget of the span. >> > > Modern sub cables does not used a distributed line of EDFAs anymore. They use > the entire cable length as an amplifier instead. If the laser is down, you can > reach it and service it, since it sits on dry land anyways. > > I have an EDFA lying around my office desk. Never know when I need one. > Uses a 250 mW 850 nm pumping laser. > > Cheers, > Magnus > > Magnus
There is a limit to the cable length when using EDFAs above which a regenerator is required. Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
