Webinar: Optical Return Loss and Reflectance

[@1967Affe]

Now I understand that Sweden must use APC if we want to meet the future standard. 10Gb/ 40Gb/ 100Gb/ New standard 25Gb/ 50Gb/ 200Gb. The future 100Gb standard to : 400Gb/ 1.6Tb/ 6.4Tb and the future speeds. . . .

[@larryjohnson9786]

Hi Scott, unfortunately there is only a limited amount of time to cover so much content. If you looks at slides 29, 35 and 36 you will see references to the OCWR along with the applicable test standards. OCWRs are mostly used for short spans (e.g. cable assemblies) and are more often in manufacturing facilities. On the other hand service providers, contractors and end users either own or have access to OTDRs.

[@hardikpatel274]

how to avoid from back reflaction in high power yb laser system?

[@LightBrigade]

Are you using a YB laser for communications? What else is in your link? Assuring you have APC connectors and keep all interfaces very clean and precise will be helpful.

[@DeepakKumarSingh2015]

Please check #dwdmotnc#discreteoptical #Norteltn #Ciena32slot

[@DeepakKumarSingh2015]

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[@1967Affe]

I think that Sweden don´t use B-PON anf G-PON systems today. But I work regarding DataCenter products today. This is most for SM G.652D (SC/UPC connector) and OM3 - OM4 fiber. And I look to the future for OM5 fiber. What is SDH (SONET)? Do you have any info regarding Sweden fiber to the future? Sweden normaly use a lot of UPC to FTTH market. Do you think that Sweden have to use APC conetors to all FTTH customers! (SM fiber with LC/APC for the future!) And what do you think regarding DataCenter´s MM with LC/APC for OM5 fiber? And what will the we use to MTP/MPO for MM fiber in the future? MPO-16 ore MPO-12 with APC polich for MM fiber? What is the future?

[@Asicatk]

Can anyone explain me how to avoid backreflaction from the end of a fibre?

[@LightBrigade]

APC connectors are always helpful. If the fiber is connectorized, a 'terminator' at the end will help. What specific problem are you having where the end reflection is a concern? We would prefer to recommend a solution to a more specific problem :)

[@Asicatk]

It is for OTDR sensing purposes. What I need is an OTDR trace without (or almost without) a spike, but with nice and clear drop to the noise floor.

[@LightBrigade]

This depends on how much of the reflection is required to be either eliminated or minimized. This will also depend on the type of fiber being tested. For most systems an optical terminator is sufficient. Check the specifications though for the value needed. Is the fiber terminated or the end of a fiber? You can also dip the end of the fiber in index matching gel. There are several other techniques which we can assist you with based on the questions about the fibers, terminations etc.

[@advancedfiberoptictraining5510]

There is no cookie cutter 1 size fits all spec for Optical Return loss. The length of the fiber under test determines that. A short link less than 1 mile with "no significant reflections" should have an ORL reading in the low +40's and a long link like 30 miles will be fixed around +32. If you are testing a 1 mile span and have an ORL of +33, you have a serious issue in that link. 1 X32 splitters do NOT need optical terminators. The nearly 17db loss thru the 1 X 32 splitter will attenuate down any reflected light. This has been proven on a test bench and in the field. Putting optical terminators on a 1 X 32 splitters is a total waste of time that will do nothing.

[@LightBrigade]

Thank you for your comment. As with many technical topics, there are often many scenarios and often more than one good answer. We encourage our students to provide us with as much detail as possible about their applications, products used and specs in order to give the best answers possible. In the previous response about terminators, we did not mean to imply this was always the answer. Also, generalizing ORL against link length is hard as well, unless we know exactly what is in that link.

[@scottdexter7130]

Disappointed you didn't talk about the OCWR method of determing ORL. Not everybody has an ODTR.

[@DeepakKumarSingh2015]

Please check kzbin.info/www/bejne/qXO2nGaaeZmAiK8