Helium cadmium (HeCd) lasers are no exception, and they provide a number of specific dangers beyond the laser output. When in use, the laser tube will become hot enough to burn skin and must not be ...

Millot and colleagues squeezed a mixture of hydrogen and helium between two diamonds and hit the concoction with a powerful laser to compress it even further. As the pressure and temperature ...

Helium-neon lasers may be little more than glorified neon signs, but there’s just something about that glowing glass tube that makes the whole process of stimulated emission easier to understand.