[160353] in North American Network Operators' Group
Re: Is Google Fiber a model for Municipal Networks?
daemon@ATHENA.MIT.EDU (Scott Helms)
Mon Feb 4 16:11:14 2013
In-Reply-To: <510FE9F8.6010409@necom830.hpcl.titech.ac.jp>
Date: Mon, 4 Feb 2013 16:10:50 -0500
From: Scott Helms <khelms@zcorum.com>
To: Masataka Ohta <mohta@necom830.hpcl.titech.ac.jp>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Mon, Feb 4, 2013 at 12:03 PM, Masataka Ohta <
mohta@necom830.hpcl.titech.ac.jp> wrote:
> Scott Helms wrote:
>
> Here is the architecture document:
>> http://static.**googleusercontent.com/**external_content/untrusted_**
>> dlcp/research.google.com/en/**us/pubs/archive/36936.pdf<http://static.go=
ogleusercontent.com/external_content/untrusted_dlcp/research.google.com/en/=
us/pubs/archive/36936.pdf>
>>
>
> The document, seemingly, does not address drop cable cost
> difference.
>
> It does not address L1 unbundling with WDM-PON, which
> requires fiber patch panel identical to that required
> for SS, either.
>
They're not doing WDM-PON or any flavor of PON at all. Its entirely an
Active Ethernet deployment.
>
> As for power consumption at CO, all the transmitters do not
> have to have power consuming LDs but can just have modulators
> to modulate light from a shared light source, which has already
> happened with QSFP+:
>
> http://www.luxtera.com/faqs/
>
> How do you generate light in silicon?
>
> Actually, we don't. Silicon is a bad material to try and
> build lasers in. Some silicon lasers have been demonstrated,
> but these are completely impractical. As it turns out there's
> no need to build a silicon laser: lasers are already very
> inexpensive (remember, there's already one in every PC
> - inside the CD/DVD player). The challenge has been finding
> an inexpensive way to attach the lasers to silicon. Solving
> this problem, and the related one of inexpensively attaching
> optical fibers to silicon, is a key piece of Luxtera's
> intellectual property. We think of a laser as being just
> like a DC power supply =96 only it provides a steady stream of
> photons rather than electrons.
>
>
Masataka, are your trying to participate in the conversation or sell gear?
The laser used in your DVD player is NOT suitable for a broadband
deployment.
> Masataka Ohta
>
>
--=20
Scott Helms
Vice President of Technology
ZCorum
(678) 507-5000
--------------------------------
http://twitter.com/kscotthelms
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