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Old 03-22-2012, 04:01 PM #1
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Question how to attach a fiber cable?

Hi all,

does anyone of you have a proper approach on connecting a fiber cable to a laser diode (pressed in a Aixiz housing)?

Thorlabs is offering some kind of "professional" fiber connectors - but they're just too expensive (>100 bucks ) for playing around with fiber cables...

It's no problem to get some plain fiber cable... but I can't find any "simple" connectors...

Any help is highly appreciated...

Cheers,


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Last edited by mojo_1234; 03-22-2012 at 05:40 PM. Reason: typo
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Old 03-22-2012, 06:45 PM #2
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Default Re: how to attach a fiber cable?

If you're simply "playing around," just focus a laser into a TOSLINK cable. The diameter is large enough you don't need anything special to launch the beam.





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Old 03-22-2012, 06:50 PM #3
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Default Re: how to attach a fiber cable?

That is a nice trick to make a beam expander. I will try it !
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Old 03-22-2012, 07:08 PM #4
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Default Re: how to attach a fiber cable?

It makes a lousy beam expander as the fiber has a huge diameter and is thus horribly multimode. A DPSS laser has a very low M^2 value, so a single mode fiber (3~4um) would give a far better beam profile than this ~1mm diameter fiber without significantly higher losses.
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Old 03-23-2012, 02:55 PM #5
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Default Re: how to attach a fiber cable?

Thanks all for your replies.

The idea to just use a cheap TOSLINK cable sounds perfect (am I blind?). This is why I love this forum

And for a few bucks you get a suitable jack:

--> TOTX-173 TOSLINK sender module

I going to order some of them today and check if it's possible to attach them in front of an AIXIZ module...

Things can be so easy...

Cheers
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Last edited by mojo_1234; 03-23-2012 at 02:55 PM. Reason: type
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Old 03-23-2012, 10:13 PM #6
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Default Re: how to attach a fiber cable?

What lens is that at the end Cyp?
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Old 03-24-2012, 12:27 AM #7
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Default Re: how to attach a fiber cable?

I don't remember. Something out of a camera maybe? Whatever you use, it needs to have a short focal length.

Yes, the output from a TOSLINK fiber will make for a very divergent beam, and using a proper fiber and launching system and collimator will give much better results. But remember this is just "playing around." No need to spend buku money for that.
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Old 03-24-2012, 05:17 PM #8
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Default Re: how to attach a fiber cable?

Where would be a good place to start looking for single-mode fiber? Would multimode fiber like we use in networks be significantly better than the "TOSLINK" fiber?
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Old 03-24-2012, 05:40 PM #9
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Default Re: how to attach a fiber cable?

Quote:
Originally Posted by BShanahan14rulz View Post
Where would be a good place to start looking for single-mode fiber? Would multimode fiber like we use in networks be significantly better than the "TOSLINK" fiber?
Here you have 85mt at a great price.

It is just one example, but you can find many of them

85m SC-SC Single Mode Fiber Optic Cable | eBay
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Old 03-26-2012, 11:35 AM #10
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Default Re: how to attach a fiber cable?

Multimode has a bit lower losses I think. The cable you link to has a 9um core diameter, which is multimode for 532nm, it's singlemode for 1550nm.
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Old 03-27-2012, 05:02 PM #11
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Default Re: how to attach a fiber cable?

thats really cool! i am so trying this when i get home!
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