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RE: spreadsheet for MMF, reprise


The OFL (over filled launch) bandwidth of a 62.5 um fiber is used for LED
type optical source, which was gone long time ago.  For the laser optical
source, the MM fiber bandwidth will be EMB (effective modal bandwidth), or
RML bandwidth (restricted mode launch, proposed by TIA FO-2.2.1)  which is
much higher than OFL bandwidth; furthermore, it represents the real
performance of a MM fiber.

We have to be careful not to use the non-realistic number for a realistic


Edward S. Chang
NetWorth Technologies, Inc.
Tel: (610)292-2870
Fax: (610)292-2872

-----Original Message-----
From: owner-stds-802-3-hssg@xxxxxxxx
[mailto:owner-stds-802-3-hssg@xxxxxxxx]On Behalf Of Rob Marsland
Sent: Wednesday, January 26, 2000 8:12 AM
To: stds-802-3-hssg@xxxxxxxx
Subject: RE: spreadsheet for MMF, reprise

On the subject of 62.5 um fiber having 160 / 500 MHz*km bandwidth at 850/
1300 nm wavelength, thanks for the replies...  Guess I pulled the trigger to
quick on that one.

Rob Marsland