Lasers made from Human Cells

This laser is made up out of human cells. It consist of genetically modified human liver cells that can produce large amounts of green fluorescent proteins that are scattered throughout the cell. A cell carrying these proteins acts as the "gain medium", the part of the laser that amplifies light energy .Like any laser, the cell laser needs an energy source to increase the power of the light it can use. The researchers pumped the living lasers by pulsing the cells with light through a microscope. As light bounces around inside the cell and is re-emitted by the fluorescent proteins, it's amplified, increasing in power before being emitted in a beam. To keep the light bouncing around as long as possible, to gain as much power as possible, the scientist placed these cells inside a biocompatible optical cavity, a tiny, highly reflective, cell-shaped hole. Scientist also say that one day this can be the back bone of the internet.