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    • 1. 发明授权
    • Device and method to scatter optical fiber output
    • 散射光纤输出的装置和方法
    • US06810184B2
    • 2004-10-26
    • US10042976
    • 2002-01-09
    • Bolesh J. Skutnik
    • Bolesh J. Skutnik
    • G02B616
    • G02B6/02066A61B2018/2261A61N5/0601A61N5/062C03B37/016C03C13/046C03C25/1061C03C25/12G02B6/0008G02B6/02G02B6/241G02B6/262
    • The present invention provides improved diffusion tips for optical fibers and methods of making the same. Nanoporous silica clad optical fibers are used to make fibers having integrally formed diffusion tips and diffusion tips that can be fused to other fibers. The disclosed diffusers can be fabricated to be cylindrical with light diffusing along its length, spherical with light radiating outwardly in a spherical pattern, or custom shaped to illuminate irregular surfaces or volumes. Gradient and step index properties can also be achieved. Several fabrication methods to achieve the desired effects are described. The problems in the prior art methods associated with epoxy, such as curing, bond strength, embrittlement, power handling limitations, and refractive index matching are avoided.
    • 本发明提供了改进的光纤扩散尖端及其制造方法。 纳米多孔二氧化硅包层光纤用于制造具有一体形成的扩散尖端和可与其它纤维熔合的扩散尖端的纤维。 所公开的扩散器可以被制造为圆柱形,其光沿着其长度扩散,球形具有以球形图案向外辐射的光,或定制成照射不规则表面或体积。 也可以实现梯度和阶跃折射率特性。 描述了实现期望效果的几种制造方法。 避免了与环氧树脂相关的现有技术方法中的问题,例如固化,粘合强度,脆化,功率处理限制和折射率匹配。
    • 2. 发明授权
    • Optical fiber and optical transmission line using the same, and optical transmission system
    • 光纤和光传输线使用相同,以及光传输系统
    • US06768848B2
    • 2004-07-27
    • US10108467
    • 2002-03-29
    • Naomi Kumano
    • Naomi Kumano
    • G02B616
    • G02B6/02014G02B6/02242G02B6/02271G02B6/0281G02B6/03644G02B6/03688
    • The present invention provides an optical fiber forming an optical transmission line for wavelength division multiplexing transmission in a 1.5 &mgr;m wavelength band, for example. The cutoff wavelength is set in the range of 1.3 &mgr;m or more to 1.4 &mgr;m or less, and the chromatic dispersion value at a wavelength of 1.55 &mgr;m is set to 4 to 10 ps/nm/km. The effective core area in at least a setup wavelength band of the 1.5 &mgr;m wavelength band is set to 40 &mgr;m2 to 60 &mgr;m2, and the dispersion slope in the 1.55 &mgr;m wavelength band is set to a positive value below 0.035 ps/nm2/km. The zero dispersion wavelength is set to 1.43 &mgr;m or less, and the bending loss at the diameter of 20 mm in the 1.5 &mgr;m wavelength band is set to 5 dB/m or less. The refractive index profile of the optical fiber is designed so that the relative refractive index difference &Dgr;1 of a first glass layer (1) of the innermost layer from a standard layer (6) and the relative refractive index difference &Dgr;3 of a third glass layer (3) at a third-layer position from the innermost from the standard layer (6) are set to positive values, and the relative refractive index difference &Dgr;2 of a second glass layer (2) at a second-layer position from the innermost from the standard layer (6) is set to a negative value.
    • 本发明提供了例如在1.5μm波长带中形成用于波分复用传输的光传输线的光纤。 截止波长设定在1.3μm以上至1.4μm以下的范围,波长1.55μm的色散值设定为4〜10ps / nm / km。 在1.5μm波长带的至少一个建立波长带中的有效核心区域被设置为40mum 2至60mum 2,并且1.55μm波长带中的色散斜率被设置为低于0.035的正值 ps / nm 2 / km。 将零色散波长设定为1.43μm以下,将1.5μm波长带的直径为20mm的弯曲损耗设定为5dB / m以下。 光纤的折射率分布被设计成使得最内层的第一玻璃层(1)与标准层(6)的相对折射率差Δ1和第三玻璃层的相对折射率差Δ3 在距离标准层(6)的最内侧的第三层位置处的第三层位置的距离设定为正值,并且第二层玻璃层(2)的距离最内侧的第二层位置处的相对折射率差Δ2 标准层(6)设定为负值。
    • 5. 发明授权
    • Choromatic dispersion compensating module and optical transmission system using the same
    • 合成色散补偿模块和光传输系统使用该模块
    • US06574404B2
    • 2003-06-03
    • US09771937
    • 2001-01-30
    • Eisuke SasaokaMasao TsukitaniShigeru Tanaka
    • Eisuke SasaokaMasao TsukitaniShigeru Tanaka
    • G02B616
    • H04B10/25133H04J14/02
    • The present invention is related to a chromatic dispersion compensating module which realizes signal transmission at a high bit rate by its simple constitution, and an optical transmission system comprising the same. The chromatic dispersion compensating module according to the present invention comprises a chromatic dispersion compensator which compensates for the chromatic dispersion of an optical fiber transmission line at a predetermined wavelength, and a temperature controller which controls the temperature of the chromatic dispersion compensator in such a manner to set the chromatic dispersion of the chromatic dispersion compensator at a desired value. By this constitution, the dispersion compensation control in correspondence with the chromatic dispersion fluctuation in the optical fiber transmission line caused by the temperature fluctuation and the like is made possible. Hence, the cumulative chromatic dispersion as viewed from the entire optical fiber transmission line can be effectively reduced by its simple constitution.
    • 本发明涉及一种通过其简单结构实现高比特率的信号传输的色散补偿模块和包括该色散补偿模块的光传输系统。 根据本发明的色散补偿模块包括补偿预定波长的光纤传输线的色散的色散补偿器,以及以这种方式控制色散补偿器的温度的温度控制器, 将色散补偿器的色散设定在期望值。 通过这种结构,可以实现与由温度波动等引起的光纤传输线中的色散波动相对应的色散补偿控制。 因此,通过简单的结构可以有效地降低从整个光纤传输线观察的累积色散。