New PowerPoint Presentation
Introduces Fiber Optics
The FOA has created a short
PowerPoint presentation that introduces you to fiber optics and
talks about job opportunities in the field. It was intended for
instructors to introdcue studnets to the field, but it's a good
introduction for anyone. It's about 3 meg file so it takes a
while to download and you need PowerPoint to view it. See http://www.thefoa.org/ppt/
Fiber To The Home Costs Down
In Korea it is, if numbers reported
in Lightwave last month are correct. Stephen Hardy's monthly
editorial says that Korea plans to connect 300,000 homes for
about $75million by 2008. Simple math says we're talking only
$250 per home, way less than we've seen quoted anywhere else.
Sounds pretty cost effective to use, if you want to offer real
10 Gigabit Ethernet Finally
Makes It on Copper - Just Not Very Far!
The IEEE, curator of the Ethernet
standard, has approved a new copper cabling standard for 10 Gigabit
Ethernet. 10GBase-CX4 does not use Cat 5 or Cat 6, it uses a
8-pair coax cable that must be factory made to go 15 m, about
50 feet, for use in data centers. The rest of the 10G standard
calls for fiber. The copperheads are still trying to make it
work on Cat 6, but now say they need 625 MHz bandwidth, effectivley
killing Cat 6 in todays marketplace.
May Help Fiber Optic Growth
Two interesting developments
in semiconductors may have big influences in the integration
of fiber optics into the heart of computers and integrated circuits
(ICs). Intel has developed a silicon IC that can act as a external
modulator for fiber optics. Previously, this required more exotic
semiconductors like InGaAs. Creating this on a silicon IC would
allow integrating optics onto a low-cost IC that could be used
for optical backplanes or internal computer connections or even
optical computing. A complementary development at the Univ of
Illinois produced a light-emitting transistor (LET), this time
in GaAs. A LET would allow integration of optical transmitters
in a IC format or create integrated transmitter devices. Both
developments are a long way from commercialization, of course,
but are indicative that R&D in photonics is still very active
and important to fiber optics.
FYI (News & Comment)
The News: TIA PUBLISHES NEW TELECOMMUNICATIONS
SYSTEMS BULLETIN TSB-140
The Telecommunications Industry
Association (TIA) has published a new telecommunications systems
bulletin (TSB), 'Additional Guidelines for Field-Testing Length,
Loss and Polarity of Optical Fiber Cabling Systems,' TSB-140.
This TSB describes field testing
of length, optical attenuation and polarity in optical fiber
cabling using an optical loss test set, an optical time domain
reflectometer and a visible light source such as a visual fault
locator. The purpose of this document is to clarify, not replace,
ANSI/TIA/EIA-526-7 and ANSI/TIA/EIA-526-14A.
TSB-140 was created by TIA TR-42.8
Subcommittee on Telecommunications Optical Fiber Cabling Systems
and released February 2004. A TSB is not a standard, but rather
contains technical material that may be valuable to industry
and users. To obtain copies of the document, please contact Global
Engineering Documents at (800) 854-7179 or visit http://global.ihs.com.
Comment: TSB-140 was created by TR-42.8 because supposedly
the followers of TIA 568 couldn't understand OFSTP-14 and -7.
In the form presented to the committee at its February meeting,
it contained three addenda that exemplified the term "obfuscate."
One attendee said he had shown them to three experienced installers
and none could figure them out. Personally, we studied them for
two hours the night before the meeting and were still confused
as to what they were trying to say. They appeared to be a kludge
method of referencing for test equipment that could not adapt
to certain types of connectors, a totally unnecessary method
if OFSTP-14 and -7 were used as they were intended.
It would be a "cheap shot"
to say that 568 is still being written by "copperheads."
The FOA Board of Directors has
decided that it is time to become involved in this committee
and will make recommendations based on our long experience in
fiber optics for the next revision of 568 that will incorporate
the wisdom of current FOTPs and OFSTPs in their original form.
You just installed a multimode
fiber optic cable that was not an easy install. Now you test
it and it shows strange results - the loss is as high at 1300
nm as 850 nm, but you know the fiber should have much lower loss
at 1300 nm. The connectors should be the same too. What's the
This year's National FIber Optic
Engineeers Conference will be in Anaheim, CA Sept 12-16. NFOEC
is the old ROBC/Bellcore show for the telco engineers, but tends
to be the more practical cousin of OFC. Check it out on their
Products of Note:
Noyes (AFL Telecom) has introduced
a "Fiber Cleaning Pack" that is a compelte cleaning
kit for all fiber optic connectors. It's biggest selling point
is the use of a non-flammable cleaning fluid, a big advantage
over the old standby isopropyl alcohol. It is model FCP1 - find
it on their website at www.AFLtele.com
Loctite, the adhesive people who
supply most of the private labelled anaerobic adhesives, is offering
specially packages versions for the fiber optic user. Smaller
bottles are good, since you would have to do thousands of connectors
to use up a bottle of Loctite 648, which is the most popular anaerobic
adhesive. Ask Loctite for a copy of their "Fiber Optic Products
Eric Pearson's Newsletters - with
some tests on connectors.
New sections of "Lennie Lightwave's
Guide To Fiber Optics" covers loss
testing of fiber optic cables and OTDRs.
Interested In Advanced Certification?
If you think you might, download
and print yourself a FOA Logbook
to keep track of your experience and traning. It will help you
qualify for the CFOS
Your Name, CFOT - It pays to
The FOA encourages CFOTs to use
the logo on their business cards, letterhead, truck or van, etc.
and provides logo
files on this site for that purpose. But we are also asked
about how to use the CFOT or CFOS certifications. Easy, you can
refer to yourself as "Your Name, CFOT" or "Your
Name, CFOS/T" for example.
Feel free to use the logo and
designations to promote your achievements and professionalism!
Remember To Renew Your Certification
Remember to renew your FOA certification.
All current CFOTs have a ID Card with their certification data
and we keep a database of current CFOTs to answer inquiries regarding
your qualifications if needed. If you forgot to renew, use the
form or the FOA
online store to renew NOW!
Want To Get FOA Email?
We have been asked if we could send the FOA newsletter by email
or post it on the website. We are looking into that and will definitely
get one started soon. When you renew your certification, you will
be asked if you are interested in email newsletters and if so,
you will be asked to give your email address for us to use in
a mailing list. If you want to get started now, send an email
to email@example.com with the
subject "eMail List" Note that The FOA never releases its mailing lists for any
use! Your data is always safe with us.
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FOA Board of Advisors
Elias Awad, Clerk, Director of Education
F. Douglas Elliot, Past President
William H. Graham
Jim Hayes, President, Treasurer
John Highhouse, Past President
Danny S. Lyall
Eric Y. Loytty
Paul Rosenberg, Past President
Richard James Smith
Want to write for the FOA
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Puzzler: The cable was
overstressed during installation or has locations that are too
tightly bent. Fiber is more sensitive to bending or stress losses
at higher wavelengths, so the effect is to make the loss similar
at 850 and 1300 nm. The same effect happens in SM fiber , but
at 1310 and 1550 nm.