METHOD AND APPARATUS FOR FORMING APERIODIC GRATING
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申请人：UNITED TECHNOLOGIES CORP 地址：US 国籍：US 代理机构：Klunker . Schmitt-Nilson . Hirsch 更多信息请下载全文后查看
摘要：A method and apparatus for simultaneously exposing an optical fiber (32), made of a material which has a refractive index that can be permanently changed by exposure to light of a predetermined intensity at a predetermined wavelength, to two writing light beams (268, 272) which intersect and interfere in a predetermined region (30) of the fiber (32) so as to create an interference pattern along a longitudinal axis of the fiber (32), for a time long enough to form a permanent refractive index variation in the waveguide. Each of said two writing beams have a predetermined number of wavelengths, each wavelength being sufficiently different from each other so as to cause said refractive index variation to be an aperiodic variation. Also, each wavelength represents a Fourier component of the desired aperiodic refractive index variation.
专利内容由知识产权出版社提供
专利名称：METHC GRATINGS IN OPTICAL FIBERS
发明人：GLENN, William, H. 申请号：EP 95904 04 5.2 申请日：1994 0930 公开号：EP0736201B1 公开日：19980708
摘要：A method and apparatus for simultaneously exposing an optical fiber (32), made of a material which has a refractive index that can be permanently changed by exposure to light of a predetermined intensity at a predetermined wavelength, to two writing light beams (268, 272) which intersect and interfere in a predetermined region (30) of the fiber (32) so as to create an interference pattern along a longitudinal axis of the fiber (32), for a time long enough to form a permanent refractive index variation in the waveguide. Each of said two writing beams have a predetermined number of wavelengths, each wavelength being sufficiently different from each other so as to cause said refractive index variation to be an aperiodic variation. Also, each wavelength represents a Fourier component of the desired aperiodic refractive index variation.
专利内容由知识产权出版社提供
专利名称：METHC GRATINGS IN OPTICAL FIBERS
发明人：GLENN, William, H. 申请号：EP 95904 04 5.2 申请日：1994 0930 公开号：EP0736201B1 公开日：19980708