Multimode raman fiber amplifier and method
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United States of America Patent
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Mar 26, 2002
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app pub date -
Jan 20, 2000
filing date -
Jan 20, 2000
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Abstract
A multimode Raman fiber amplifier and method for generating high levels of laser output power from arbitrary pump laser wavelengths using Stimulated Raman Scattering (SRS) in optical fibers of a dual clad design. The optical fibers are amplified in such a manner that facilitates high power, improves brightness conversion, increases conversion efficiency, effectuates lower laser pump brightness, and increases output beam quality. The invention includes a signal core which can support an arbitrary multimode signal from a pump laser, an SRS pump core, and low index outer cladding. The refractive indices of the aforementioned are designed to propagate SRS along the length of the optical fiber.
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