Optical fiber and nonlinear optical fiber, optical

专利名称：Optical fiber and nonlinear optical fiber,

optical amplifier and wavelength converterusing the same, and method of makingoptical fiber

发明人：Masaaki Hirano,Masashi Onishi,Toshiaki

Okuno

申请号：US099868申请日：20011113

公开号：US20020057880A1公开日：20020516

专利附图：

摘要：Employed as a structure of a highly nonlinear optical fiber (nonlinear opticalfiber) is a double-cladding structure in which a first cladding region and a second claddingregion are disposed on the outer periphery of a core region Since the double-claddingstructure is employed, the cutoff wavelength &lgr;can sufficiently be shortened evenwhen, in order to increase the nonlinear coefficient &ggr;, the concentration of

GeOadded into the core is enhanced so as to raise the nonlinear refractive index, or therelative refractive index difference between the core and cladding is increased so as toreduce the effective area A. This realizes an optical fiber or nonlinear optical fibershortening its cutoff wavelength while having a sufficient nonlinearity, an optical amplifierand wavelength converter using the same, and a method of making an optical fiber.

申请人：SUMITOMO ELECTRIC INDUSTRIES, LTD.

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