My periodic table poster is now available! Erbium-doped amplifier. This is a MOEC High Power laser erbium-doped Waveguide Amplifier. It amplifies light pulses without ever turning them into electricity. Source: eBay seller healingmass Contributor: Theodore Gray Acquired: 17 April, 2009 Text Updated: 17 April, 2009 Price: $3 Size: 4" Purity: <5%