Recent content by jlyu

Actually, I do not think it belongs to 7 or 19 cell design. :frown: It is made by some other research group.

I have one hollow core fiber, the core is around 20um, Numerical Aperture is 0.03. The spot size of Ti:Sapphire laser is around 2~2.5mm. So I used focal length 50mm. But only very few power can be achieved (6uw). I wonder the reason. Could someone please give me some suggestions?