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ASK FOC

Have a technical question for Fiber Optic Center?

Please email your question to AskFOC@focenter.com and we will respond ASAP. 

In addition to replying, we will post your question and our answer here on the AskFOC page.  Everyone remains anonymous when we post so feel comfortable asking your questions.  You can also search to see if your question has already been answered in the FAQs section below.

Removal of Coatings from Short Fiber in Certain Sections

Removal of Coatings from Short Fiber in Certain Sections

  QUESTION: We need to make short fiber with the coating removed in certain sections.  Some coatings are hard to remove.   Are there automated solutions for that? ANSWER: We work with 3SAE Technologies who has designed and manufactured a wide range of high performance...

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Removal of Coatings from Short Fiber in Certain Sections

The two wavelengths used for Insertion Loss testing

QUESTION:  What are the two wavelengths used for Insertion Loss testing?     ANSWER:   In standard Singlemode cable assembly, the two wavelengths used for Insertion Loss testing are 1310nm and 1550nm.  All Singlemode fibers work very similarly in either...

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Proper curing temperature profile

QUESTION:  What is the proper curing temperature profile?   ANSWER:   In most cases, cable assembly manufacturers are curing by placing their room-temperature product into pre-heated curing ovens---quite a thermal shock.  Based on our observations, it seems that...

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Concerns with automation in the optical fiber industry

QUESTION: What are the concerns with automation in the optical fiber industry?   ANSWER:     One of the concerns with automation in the optical fiber industry is that you want a stable technology.  Again, fusion splicing serves as a good example: when companies...

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End-faces capped until final installation

Question:  When a manufacturer inspects an end-face, is it immediately capped with a plastic dust cap that is not removed again until it is plugged into its final installation location by the installer?  Answer:    Yes and in theory, this ensures connectors will be...

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Deciding which epoxy is the best for the application

QUESTION:  Which epoxy is the best for my application?   ANSWER:   Fiber Optic Center offers several epoxies for single mode and multimode products. Refer to the “Chart of Epoxies for Single Fiber, Single Mode and Multimode Terminations” to review epoxy...

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How to Select the Right Epoxy for a New Application

QUESTION: How can I select the right epoxy for a new application? ANSWER: I’m happy to help you determine the epoxy that will work best for your application. Just send an email to me at KBarker@focenter.com and include answers to these questions: Can you tell me...

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Why Isn’t There One Standard Polishing Process?

QUESTION: Why isn't there one standard polishing process? ANSWER: Here’s a key reason why we don’t have one standard polishing process: Single-fiber and multifiber ferrules are composed of different materials and have different shapes, diameters, hardness, and...

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Epoxy information in the form of a matrix

QUESTION:  Do you have epoxy information in the form of a matrix?   ANSWER:   FOC does have a Single Fiber, Single Mode and Multimode terminations matrix that can be found in the BLOG ARTICLE:  Does epoxy cause core cracking? Tips to identify and prevent this...

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Amount of water that should be used when polishing

QUESTION: How much water should we use when polishing?   ANSWER:  When fiber optic cable assembly houses set up a new polishing machine and establish their polishing process, they often find that film slipping or coming off the pad is an issue. To provide...

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More detail about the bend test needed

QUESTION:  In your blog, Good stripping techniques for your fiber optic cable assembly process, there is a tips for stripping tools called “First, Do No Harm” where you refer to a common 45-degree bend test method.  Can you give more detail about the bend...

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Considering the Tg when selecting an epoxy

QUESTION:  Why do we need to consider the Tg when selecting an epoxy?    ANSWER:   One reason to consider the Tg is in selecting an epoxy that is appropriate for an application.  For an application requiring a flexible epoxy, a low Tg, something below 0°C is...

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The advantage of using coated flock pile pads

QUESTION:   What is the advantage of using coated flock pile pads?   ANSWER:  CMP flock pile pads have gone from being a good idea – but problematic – to becoming an advanced process that offers repeatable, predictable results. In the early days of...

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Epoxy past expiration

QUESTION: Our epoxy is past expiration – can it still be used?   ANSWER: Fiber Optic Center recommends that you test the material before using it in your production process. Cure it to see if it sets as expected. However, it’s difficult to determine if it has,...

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How precise epoxy packaging weights are

QUESTION:  How precise are the epoxy packaging weights?   ANSWER: The fiber optic world is driven by precision. If you purchase a 4-gram package, you can rely on getting 4 grams of epoxy. This is a data point to consider as you determine which package size best...

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Common layers and what to consider when stripping

QUESTION: Does FOC have information on common layers and what to consider when stripping?   ANSWER: Without question, good stripping techniques in your fiber optic cable assembly process are imperative. What happens if you damage the fiber during this production...

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On polymer plastics being isotropic

QUESTION: Are polymer plastics isotropic? ANSWER: Most polymer plastics are inherently isotropic (that is, that is they have no directionality in their optical properties).   However, when formed in the injection molding process the polymer is melted, injected and...

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Tricks to keep the polishing film from moving

QUESTION:  Is there a trick to keep the polishing film from moving?   ANSWER:   When fiber optic cable assembly houses set up a new polishing machine and establish their polishing process, they often find that film slipping or coming off the pad is...

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Keeping scratches to a minimum after using final film

QUESTION: How can we keep scratches to a minimum after using final film?     ANSWER:  We usually request a visual image of one or more scratches as well as geometry measurements of the connectors in order to answer this question.   With this information, we...

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Premixed, frozen epoxy: best for the process

QUESTION:  Would premixed, frozen epoxy work better for my process?   ANSWER: Our customers who use premixed, frozen epoxy report two major benefits: (1) No need to worry about improper mixing due to operator error. Epoxy that is overmixed, undermixed, or has...

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ÅngströmLap polishing film and other brands

QUESTION: Does FOC have many customers using ÅngströmLap polishing film or are other brands more prevalent?   ANSWER: Hundreds of fiber optic cable assembly facilities around the world use Fiber Optic Center’s ÅngströmLap polishing film, including multiple...

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Advice for best-practice crimping techniques

QUESTION:       What are the best practices for crimping techniques? ANSWER: The crimping process involves the connector body, a metal crimping sleeve (or ring), and the material to be clamped – normally this is the aramid yarns (also...

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How to tell if the epoxy has “gone bad”

QUESTION:   We have issues with crystallized epoxy: has the epoxy had “gone bad”?   ANSWER: This question has come up so often, I have written article to educate our customers about crystallization in epoxies including information on: How this happens. Why the...

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Removal of Coatings from Short Fiber in Certain Sections