公开(公告)号：US06385379B1

公开(公告)日：2002-05-07

申请号：US09505771

申请日：2000-02-17

申请人： Jean-Claude Rousseau ,  Michel Hertz ,  Marianne Paillot ,  Raphaelle Sauvageon ,  Jean-Francois Chariot

发明人： Jean-Claude Rousseau ,  Michel Hertz ,  Marianne Paillot ,  Raphaelle Sauvageon ,  Jean-Francois Chariot

IPC分类号： G02B616

CPC分类号： G02B6/02214 ,  G02B6/02

摘要： A stepped index optical fiber is disclosed having a chromatic dispersion cancellation wavelength less than 1 280 nm or even 1 250 nm. The fiber can be used for wavelength-division multiplex transmission not only in the window around 1 550 nm but also in the window around 1 300 nm. The chromatic dispersion in the second window enables transmission without excessively penalizing non-linear effects. A fiberoptic transmission system which uses the above fiber as line fiber is also disclosed.

摘要翻译： 公开了一种具有小于1 280nm或甚至1 250nm的色散消除波长的阶梯折射率光纤。 该光纤不仅可以在大约1 550nm的窗口中，而且在大约1 300nm的窗口中用于波分复用传输。 第二窗口中的色散使得能够传输而不会过度惩罚非线性效应。 还公开了使用上述光纤作为线光纤的光纤传输系统。

公开(公告)号：US6071487A

公开(公告)日：2000-06-06

申请号：US116337

申请日：1998-07-16

申请人： Jean-Florent Campion ,  Jacques Goudeau ,  Jean-Francois Chariot ,  Christelle Lavallade

发明人： Jean-Florent Campion ,  Jacques Goudeau ,  Jean-Francois Chariot ,  Christelle Lavallade

IPC分类号： C01B33/18 ,  C03B19/10 ,  C03C1/00 ,  C01B33/157 ,  C01B33/12

CPC分类号： C01B33/18 ,  C03B19/1065 ,  C03B19/1095 ,  C03C1/006 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  Y02P40/57

摘要： In the method, a suspension of silica particles in water is provided, the suspension is gelled, the resulting gel is dried under microwaves, the dried gel is fractioned into silica granules having a diameter lying in the range 10 .mu.m to 1000 .mu.m, having an apparent density of about 0.5 g/cm.sup.3 to 0.6 g/cm.sup.3, and a porosity of less than 20%, and the granules are screened in the range 100 .mu.m to 500 .mu.m. The suspension in water of silica particles is made by mixing silica soots having a size of less than 0.1 .mu.m and silica grains having a size greater than 1 .mu.m. Its maximum concentration in total weight is greater than that of a suspension of synthetic soots on their own, thereby making it possible to increase the production capacity of the method. Advantageously, the out-of-range granules rejected by the screening are recycled as silica grains for the aqueous suspension, thereby making it possible to increase the accumulated production efficiency of the method.

摘要翻译： 在该方法中，提供二氧化硅颗粒在水中的悬浮液，悬浮液凝胶化，得到的凝胶在微波下干燥，将干燥的凝胶分级成直径在10〜1000μm的二氧化硅颗粒， 具有约0.5g / cm 3至0.6g / cm 3的表观密度和小于20％的孔隙率，并且将颗粒筛选在100μm至500μm的范围内。 二氧化硅颗粒的水悬浮液通过混合尺寸小于0.1μm的二氧化硅烟炱和尺寸大于1μm的二氧化硅颗粒来制备。 其总重量的最大浓度本身大于合成​​烟灰的悬浮液的最大浓度，从而可以提高该方法的生产能力。 有利地，通过筛选而排除的超出范围的颗粒作为水性悬浮液的二氧化硅颗粒再循环，从而可以提高该方法的累积生产效率。