METHOD OF AMPLIFYING OPTICAL SIGNALS USING ERBIUM-DOPED MATERIALS WITH EXTREMELY BROAD BANDWIDTHS

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In a method of amplifying optical input signals over a wide bandwidth, the optical input signals are applied to anoptical waveguide (810) made from a rare-earth-doped amorphous yttrium aluminum oxide material (e.g., erbium-doped yttriumaluminum oxide material). The optical input signals include optical signals having wavelengths shorter than 1, 520 nanometers andoptical signals having wavelengths longer than 1, 610 nanometers. Pump light is applied to the optical waveguide (810) to causethe waveguide to provide optical gain to the optical input signals. The optical gain causes the optical signals to be amplified withinthe waveguide to provide amplified optical signals over the extended range from approximately 1, 480 nanometers to approximately1, 650 nanometers, including, in particular, optical signals having wavelengths shorter than 1, 520 nanometers and optical signalshaving wavelengths longer than 1, 610 nanometers.