slides for meeting with
strawman/draft/placeholder table of launch types vs fibre and tests
for group discussion and review
I’ve put in some numbers but to indicate
they are not jointly agreed, this is rev 0.0 !
usual call details for tomorrow (wednesday
9.30 ) plus agenda to follow shortly
best wishes
Jonathan
tel: 1 408 524 5110
e-mail: jking@bigbearnetworks.com
fax: 1 408 739 0568
Jonathan King
Director, Optical Systems
BigBear Networks
345 Potrero Avenue
Sunnyvale, CA 94085
-----Original Message-----
From:
owner-stds-802-3-10gmmf@IEEE.ORG [mailto:owner-stds-802-3-10gmmf@IEEE.ORG] On Behalf Of Paul Kolesar
Sent: Tuesday, December 14, 2004
5:34 PM
To: STDS-802-3-10GMMF@LISTSERV.IEEE.ORG
Subject: Re: [10GMMF] Task 2 and 4
slides for meeting Dec15th - OM3 fibre measurements
Jonathan,
presuming
that MMCL is the native launch from the TOSA directly into MMF, then the
increase in PIE-D relative to the SMCL case would be attributable to power that
gets filtered out by the SM cord. Into which mode groups this filtered
power couples is of key importance, since the modal delay difference relative
to the lowest order modes will increase with mode group number, leading to
higher PIE-D. So it becomes critical to quantify the native launch. While
a CPR measurement can be of some assistance, it can only tell us how much
power lies in higher modes, not which higher modes are excited. So its
utility is very limited, unless the CPR requirement is set very low, meaning
very little power is permitted to be filtered out by a SM cord. But an
encircled flux measurement could provide sufficient information. Can you
measure EF at 1300 nm?
In
addition, the native launch would need to be examined with the effects of
offset connections near the transmitter. With this effect included, it is
likely that the performance of this particular native launch will degrade to
levels similar to those of the MCP without offset connectors (green bars on
slide 5).
Regards,
Paul Kolesar
SYSTIMAX® SOLUTIONS
1300 East Lookout Drive
Richardson, TX 75082
Phone: 972.792.3155
Fax: 972.792.3111
eMail: pkolesar@systimax.com
|
Lew Aronson
<lew.aronson@FINISAR.COM>
Sent
by: owner-stds-802-3-10gmmf@IEEE.ORG
12/14/2004 05:08 PM
|
Please
respond to
"IEEE P802.3aq 10GBASE-LRM" <stds-802-3-10gmmf@IEEE.ORG>
|
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To
|
STDS-802-3-10GMMF@listserv.ieee.org
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cc
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Subject
|
Re: [10GMMF] Task 2 and 4 slides for
meeting Dec15th - OM3 fibre measurements
|
|
Jonathan,
What is multimode center launch exactly (MMCL)?
Also, why do you have a 2nd 7 um offset connector in the 50 MCP case?
It is shown after the main spool so I presume it
does not have a large effect, but what was the motivation?
Finally, did you ever test any of the OM3 with a
62-MCP (i.e larger offset than 16 um).
Lew
Lew Aronson (lew.aronson@finisar.com)
Finisar Corporation
1308 Moffett Park Drive
Sunnyvale, CA 94089-1133
408-542-4215 (PH)
408-543-0083 (FAX)
-----Original Message-----
From: Jonathan King
[mailto:jking@BIGBEARNETWORKS.COM]
Sent: Tuesday, December 14, 2004 2:22 PM
To: STDS-802-3-10GMMF@listserv.ieee.org
Subject: Re: [10GMMF] Task 2 and 4 slides for
meeting Dec15th - OM3
fibre measurements
Here are some measurements of OM3 fibre PIE-D values
for various launch
conditions, contribution for task 2 and 4 meeting
on wednesday 15th Dec
04
best wishes
Jonathan
tel: 1 408 524 5110
e-mail: jking@bigbearnetworks.com
fax: 1 408 739 0568
Jonathan King
Director, Optical Systems
BigBear Networks
345 Potrero Avenue
Sunnyvale, CA 94085