[171319] in North American Network Operators' Group
Re: Pluggable Coherent DWDM 10Gig
daemon@ATHENA.MIT.EDU (Julien Goodwin)
Sat Apr 26 00:52:54 2014
Date: Sat, 26 Apr 2014 14:52:34 +1000
From: Julien Goodwin <nanog@studio442.com.au>
To: Mikael Abrahamsson <swmike@swm.pp.se>, Phil Bedard <bedard.phil@gmail.com>
In-Reply-To: <alpine.DEB.2.02.1404260555510.19744@uplift.swm.pp.se>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 26/04/14 14:00, Mikael Abrahamsson wrote:
> On Fri, 25 Apr 2014, Phil Bedard wrote:
>
>> What are you trying to do? Why do you need the receive side to be tuned
>> to a specific narrowband wavelength?
>
> Because he doesn't want to use filters. A coherent receiver s like a FM
> radio, you can tune what it listens so. So if you send it all waves the
> receiver can decide what to listen to.
But you'd never send it all the waves anyway, that's far too much loss
across the band.
ROADMs already solve this problem, and are available at the module level
(how practically available and usable I've no idea, never needed to try).
