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how to attach a fiber cable?

mojo_1234

mojo_1234

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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 :banned:) 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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Cyparagon

Cyparagon

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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.

DSCF1222.jpg


DSCF1228.jpg


DSCF1219.jpg
 
Blord

Blord

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That is a nice trick to make a beam expander. I will try it !
 
Bluefan

Bluefan

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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.
 
mojo_1234

mojo_1234

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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 :D

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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jakeGT

jakeGT

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What lens is that at the end Cyp?
 
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Cyparagon

Cyparagon

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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.
 
BShanahan14rulz

BShanahan14rulz

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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?
 
Bluefan

Bluefan

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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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