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Ultra Fast Optical Amplifier: Silicon and Erbium On One Chip for the First Time

Within optical microchips, light finds its way through channels, waveguides, made of silicon. Light from a glass fiber, for example, is led through a structure of optical channels with splitters and couplers. Silicon is the workhorse for this, but it is still passive conduction of light, with some losses as well. To be able to amplify the signal, or even to include a light source on the chip, extra steps are necessary. Other types of semiconductors, like Gallium Arsenide, are an option. But materials doped with the rare earth material erbium have good amplification properties as well.

The micro chip that will save your memory: Scientists set to implant device to preserve experiences into BRAINS

A group of U.S. researchers believe that a microchip that will help create memories in damaged brains could be implanted into human volunteers in the next two years.