Lining up the beam from your homebrew (or retrofitted) laser cutter doesn’t come without its challenges. For instance, how do I use my remaining eye to align an invisible beam that has enough power to ...

A laser level casts a straight line, leaving your hands free to do work. An easy way to align mirror clips is in the shape of a peace sign. Put away your tape measure and let the level be your guide.

Is it possible to make a femtosecond laser entirely out of glass? That’s the rabbit hole that Yves Bellouard, head of EPFL’s Galatea Laboratory, went down after years of spending hours – and hours – ...