Well, I can some some of them listen to different wavelengths or else NG-PON
would never work.
But a CWDM mux is pretty cheap.
-----Original Message-----
From: [email protected]
Sent: Wednesday, October 10, 2018 3:41 PM
To: [email protected]
Subject: Re: [AFMUG] Dumb Fiber MUX question
Can I use a splitter instead of a Mux/Demux?
Not to separate wavelenghts.
I'm just thinking if I have color coded SFP's that only talk and listen
on their own wavelengths, and assuming I'm ok with the losses from
splitters, then do I actually need a Mux?
SFPs have broadband light detectors, so they don't actually "listen" to a
specific wavelenght.
So, yes, you need to demux the wavelenghts in order to filter away all
other wavelenghts than the one you want to "listen" to.
If you are using just one TX and one RX wavelenght then you could use a
splitter on both ends assuming you have the optical budget and there aren't
too many impairments degrading the signal (reflections, self interference,
etc.). But if there's just one RX and one TX, why not use Bidi optics
instead?
Anything with more then one TX or RX wavelenght will need muxers and
demuxers.
I'm looking at a scenario where I could have a Mux at one end of a
fiber, but I don't have electric at the point where I'd like to split it
back into two connections. That's what got me wondering.
If you use a passive mux/demux you don't need power.
However, I feel like I'm missing something. Are you trying to use a
splitter instead of a OADM?
Something funky like this?
MUX--splitter--DEMUX A
|
\-- DEMUX B
I guess that could work.
Jared
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