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Lens / expander / focus suggestion for high power 915nm fiber?

peterloron

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Mar 24, 2016
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I have a high power (60W+) 915nm diode laser which is fiber coupled. I believe the fiber is 105um. The end is unterminated, just bare fiber. I'm intending to get this hooked into my CNC router for cutting/etching/marking.

I've done some looking around the forum, etc for information but haven't turned up anything specific on how-to or recommendations of specific lenses or beam expanders to use. Most of what I've found is either for much lower power non-fiber-coupled diodes or for CO2 lasers which are not at all the same wavelength.

Does any kind soul have some information they can point me at? Thanks.
 




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