RE: 10GBase-LR/LW Supporting 1550 nm

[Jugnu Ojha <jojha@caspiannetworks.com>]

Ali, 

I think interop between 1310 and 1550 would be extremely useful.  Does
anybody have any precise numbers for responsivity in the two ranges?  It
would be advisable to quantify this and determine any impact on overload,
BER, etc.  

Regards, 
Jugnu Ojha 
Caspian Networks 
(408)382-5213

-----Original Message-----
From: Ali Ghiasi [mailto:aghiasi@earthlink.net]
Sent: Wednesday, April 11, 2001 7:01 PM
To: Serial; stds-802-3-hssg-serialpmd@ieee.org
Cc: Ali Ghiasi
Subject: 10GBase-LR/LW Supporting 1550 nm


Hi 

Last week during the serial PMD call I suggested possible need for 
Interoperability between 1550 and 1310 nm.  I was asked to write a
short description.

MY intention was if you have a 1550 nm source assuming you met overload
for the 1300 nm receiver you are allowed to operate with 10GBase-LR/LW 
over 10 Km.  If we look at Table 52-13 the wavelength range currently
specified from 1265-1355 nm.  Without adding any burden we can
define a second window around 1550 nm to allow use of 1550 nm lasers
with 10GBase-LR/LW.  InGaAs/InP detector sensitivity is nearly flat 
in this region and it may only require to specify dual wavelength AR 
coating, which is already very common.

Thanks,

Ali Ghiasi << File: Card for Ali Ghiasi >>