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<div class="moz-cite-prefix">On 22/09/2016 1:16 AM, Kim Pearce
wrote:<br>
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cite="mid:CAGzu7ABhJQOiZBSnhHNeJAt_Pqm9YyEv7SKPKzp6nqtk-TD4zg@mail.gmail.com"
type="cite">
<div dir="ltr">Nice write up thanks for sharing James - some
pretty cool micrograph pics. And great advice about keeping
fibre out from underneath rolling office chairs.</div>
</blockquote>
<br>
Yes - What isn't covered there much, is that bend radius matters -
do not pull fibres tight around sharp corners, lest it be melted by
the laser heat like <a
href="https://www.dropbox.com/s/am7z75tbqi9fgzv/Optical%20fiber%20melted%20RAMAN_3W.bmp?dl=0">this</a>.
<br>
<br>
I learnt the hard way many years ago, when it took me two nights to
diagnose a flakey connection. Inspect and clean a patch-cord before
every insertion - even if you just pulled it out of the socket a few
seconds ago.<br>
<br>
Remember that the 1550nm wavelength range is infra-red - dirt and
dust is actually blocking *heat*, and the contaminants can heat up
enough to pit and damage the glass face of the connector. If that
happens to a patch-cord, not so bad, get another one. If that
happens in the socket of a line-card, wave goodbye to the linecard.<br>
<br>
Also a good reason to keep all the little plastic end caps and
patch-panel socket caps in plastic zip-loc bags nearby, rather than
allowing them to roll around in the dust on top of the patch-panel
or window shelf.<br>
You *really* don't want to be putting a dusty end-cap back onto a
patch-lead.<br>
<br>
Paul<br>
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