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Old 12th May 2012, 07:44 PM   #1
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Default Building an optical cable with ST connectors

Do you know where I could find ST connectors, and more important a tutorial explaining how to link the ST connectors to the fiber ? Is there a particular tool required ?
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Old 16th May 2012, 05:05 PM   #2
macboy is offline macboy  Canada
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Yes, there is a very special tool required to terminate optical fiber and it will cost thousands or tens of thousands.

The type of "fiber optics" used in audio does not use true optical fiber and is not terminated in anything even remotely close to the same way.

Also, try this informative link
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Old 16th May 2012, 11:59 PM   #3
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I have used hot melt ST connectors in the field. Strip, have connector in the hot melt "heater" so to speak. Once up to temp remove and insert the fiber. Been 10 years or so since I have done this, worked at Simplex. Moved on to Corning and US Conec was over all molding and made all mold mods and adjustments. This was for 4,8,12 ribbon cable ferrules. I think there is a easier way with out using hot melt now can't remember got out of field work. It don't cost thousands or tenz of thousands if so simplex could not afford it back before they got bought out. Much less letting me do it when I was 19. Do a search for hot melt ST connectors and look for a crimp or compression style I am sure they have came up with another way of doing this.
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Old 17th May 2012, 12:50 PM   #4
macboy is offline macboy  Canada
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Quote:
Originally Posted by eletech View Post
I have used hot melt ST connectors in the field. Strip, have connector in the hot melt "heater" so to speak. Once up to temp remove and insert the fiber. Been 10 years or so since I have done this, worked at Simplex. Moved on to Corning and US Conec was over all molding and made all mold mods and adjustments. This was for 4,8,12 ribbon cable ferrules. I think there is a easier way with out using hot melt now can't remember got out of field work. It don't cost thousands or tenz of thousands if so simplex could not afford it back before they got bought out. Much less letting me do it when I was 19. Do a search for hot melt ST connectors and look for a crimp or compression style I am sure they have came up with another way of doing this.
Before inserting the fiber into the connector, you need to strip it. This is not done with a wire stripper, you need a fiber stripper that can strip without nicking the fiber.
And after inserting the fiber into your connector of choice (hot melt, epoxy, whatever), you need to trim the fiber, then polish it in at least 3 steps leading down to a 1 um diamond grit polishing paper. Everything must be done with great care, and the proper equipment, so as not to shatter, crack, or pit the fiber. It is made of brittle glass after all.
Make no mistake, even field termination equipment is going to cost a bundle of money.

There are no-polish crimp connectors available, but they are a compromise with some signal loss in exchange for ease of use. In DIY, we usually go for the more labor intensive, higher performance methods right?
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Old 17th May 2012, 03:06 PM   #5
AuroraB is online now AuroraB  Norway
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Most professionals have by now skipped doing self-mount connectors in the field. Pigtails and splicers are so much quicker these days.
Patchcords are readily available for aorund 10$ a piece with the connectors of choice. Just check out any fiber supply shop.....
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Old 18th May 2012, 03:45 AM   #6
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Quote:
Originally Posted by macboy View Post
Before inserting the fiber into the connector, you need to strip it. This is not done with a wire stripper, you need a fiber stripper that can strip without nicking the fiber.
And after inserting the fiber into your connector of choice (hot melt, epoxy, whatever), you need to trim the fiber, then polish it in at least 3 steps leading down to a 1 um diamond grit polishing paper. Everything must be done with great care, and the proper equipment, so as not to shatter, crack, or pit the fiber. It is made of brittle glass after all.
Make no mistake, even field termination equipment is going to cost a bundle of money.

There are no-polish crimp connectors available, but they are a compromise with some signal loss in exchange for ease of use. In DIY, we usually go for the more labor intensive, higher performance methods right?
Point being it don't cost 10z of thousands of dollars! Field work yes you scribe the fiber break it polish it on a standard polish pad in a figure 8. Use your little $20 scope to insure no cracks around the corner. He ask I told him.
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