In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to an optical waveguide made from a rare-earth-doped amorphous material (e.g., erbium-doped Bi4Ge3O12 material). The optical input signals include optical signals having wavelengths over a range...http://www.google.ca/patents/US6972896?utm_source=gb-gplus-sharePatent US6972896 - Method of amplifying optical signals using doped materials with extremely broad bandwidths
