Gentlemen,

I´m a hobbyst and I´ve heard about fiber lases.
There are modules on sale on eBay, some are big and rated at 40W optical power.
Most of them have a fiber connector.

But how do I use the fiber??
Can I take the connector and put it close to the part I want to cut/mark? do I need lenses?

I saw many videos on youtube and searched for sites, none of them show how a hobbyst can use it.

Is there a site with more information?

thank you!