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    • 3. 发明公开
    • 평탄한 감쇄이득을 갖는 광감쇄기용 광섬유
    • 具有平坦衰减增益的光纤衰减器的光纤
    • KR1020020064506A
    • 2002-08-09
    • KR1020010005024
    • 2001-02-02
    • (주)옵토네스트광주과학기술원
    • 한원택김진행
    • G02B6/00
    • G02B6/266C03B19/1438C03B37/01838C03B2201/10C03B2201/28C03B2201/31C03B2201/32C03B2201/40G02B6/122
    • PURPOSE: An optical fiber for an optical attenuator having a flat attenuation gain is provided, which has a flat attenuation characteristics at an optical signal band by doping a pair of metal ions having light absorption yields of a negative slope and a positive slope into a core of the optical fiber. CONSTITUTION: An optical fiber comprises a cladding layer(12) and a core layer(13). At least more than one component among the first metal ions of Fe, Cr and Mn, whose light absorption characteristics is decreased in a fixed wavelength band, and the second metal ion of a Cobalt(Co) component, whose light absorption characteristics is increased in the fixed wavelength band, are co-doped to the core layer. The second metal ion is formed by mixing a Ni component to the Co component. And an Al component also is co-doped to the core layer.
    • 目的:提供一种用于具有平坦衰减增益的光衰减器的光纤,其通过将具有负斜率和正斜率的光吸收产率的一对金属离子掺入到核心中而在光信号频带处具有平坦的衰减特性 的光纤。 构成:光纤包括包覆层(12)和芯层(13)。 在固定波长带中光吸收特性降低的Fe,Cr和Mn的第一金属离子中的至少多于一种成分,以及光吸收特性增加的钴(Co)成分的第二金属离子 固定波长带共同掺杂到核心层。 通过将Ni组分与Co组分混合形成第二金属离子。 并且Al组分也被共掺杂到芯层。
    • 6. 发明公开
    • 분산제어 광섬유 및 그 대구경 모재의 제조 방법
    • 用于制造大尺寸预制件和用于分散控制的光纤的方法
    • KR1020010010769A
    • 2001-02-15
    • KR1019990029828
    • 1999-07-22
    • 삼성전자주식회사
    • 이지훈도문현
    • G02B6/02G02B6/00
    • G02B6/02009C03B37/01807C03B2201/12C03B2201/28C03B2201/31C03B2203/36G02B6/02219G02B6/02242G02B6/03622G02B6/03694Y02P40/57
    • PURPOSE: A method for fabricating a large size preform of an optical fiber for dispersion control is provided to reduce the variation of the optical property, and to prevent the shrinking deformation of a deposition tube. CONSTITUTION: An optical fiber for dispersion control (300) comprises a core layer(310) composed of silica, germanium oxides and phosphorus oxides, and a clad layer(320) composed of silica, germanium oxides, phosphorus oxides and Freon. A coating layer(330) is disposed on the periphery of the clad. The silica is a main component of the core and the clad, the germanium oxides is added for adjusting the refraction dispersion, the phosphorus oxides is added for reducing the viscosity difference, and the Freon is added for lowering the refraction. The clad layer is deposited on the inner surface of a deposition tube, and the core layer is deposited on the inner surface of the clad layer. A hollow section remaining in the center of the core layer is filled by heating the deposition tube along the axial direction thereof using a burner. It is possible to achieve the uniform optical property by minimizing the variation of the optical property even when a drawing temperature is increased for drawing the optical fiber for dispersion control from the large size preform. Also, it is possible to lower the core deposition temperature, and to reduce the concentration time.
    • 目的:提供一种用于制造用于分散控制的光纤的大尺寸预制件的方法,以减少光学性能的变化,并且防止沉积管的收缩变形。 构成:用于色散控制的光纤(300)包括由二氧化硅,氧化锗和氧化磷构成的芯层(310)和由二氧化硅,氧化锗,磷氧化物和氟利昂组成的包层(320)。 涂层(330)设置在包层的周边。 二氧化硅是核心和包层的主要成分,添加锗氧化物以调节折射分散体,加入磷氧化物以降低粘度差异,并加入氟利昂用于降低折射。 包覆层沉积在沉积管的内表面上,并且芯层沉积在包覆层的内表面上。 通过使用燃烧器沿着其轴向加热沉积管来填充留在芯层中心的中空部分。 即使当从大尺寸预成型件拉伸用于分散控制的光纤拉制拉伸温度时,通过最小化光学特性的变化也可以实现均匀的光学性能。 此外,可以降低芯沉积温度,并减少浓缩时间。