OPTICAL FIBER SUPERLUMINESCENT LIGHT SOURCE

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An apparatus includes an amplified spontaneous emission source, which in turn includes an optical fiber. The optical, fiber includes a solid core and a first end. The solid core includes a silica matrix. The silica matrix includes a rare-earth element and a glass co-dopant. The rate-earth element includes dysprosium or neodymium. The glass co-dopant includes AI2O3. The apparatus further includes a laser pump diode coupled to the first end of the optical fiber. The laser pump diode and the optical fiber cooperate to generate a spontaneous spectral emission confined to the solid core. The spontaneous spectral emission includes a simultaneous plurality of spectral regions.