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DOUBLE-CLAD FIBER, OPTICAL FIBER AMPLIFIER, AND FIBER LASER
DOUBLE-CLAD FIBER, OPTICAL FIBER AMPLIFIER, AND FIBER LASER
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机译:双包层光纤,光纤放大器和光纤激光器
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摘要
PROBLEM TO BE SOLVED: To provide a double-clad fiber which cannot produce deterioration or damage on an excitation light source easily when it is used as a fiber for excitation, and to provide an optical fiber amplifier and a fiber laser using the double-clad fiber.;SOLUTION: The double-clad fiber 23 includes a core 24, a first clad portion 25 with a refractive index lower than the core provided in the ambients of this core, and a second clad portion 26 with refractive index lower than the first clad portion provided in the ambients of this first clad portion. Further, the fiber has a dopant to which loss in the optical signal of the wavelength λ1 becomes larger than the loss in the wavelength λ2 of the excitation light source.;COPYRIGHT: (C)2007,JPO&INPIT
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