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公开(公告)号：US4679899A
公开(公告)日：1987-07-14
申请号：US706574
申请日：1985-02-28
CPC分类号： C03C25/106 , C03C25/1065
摘要： An optical fiber of a silica-based material includes a coating of cured silicone rubber covering an outer surface thereof. The cured silicone rubber coating, when subjected to an infrared spectroscopic measurement, has a transmissivity of not less than 70% at a wave number of 2100 to 2200 cm.sup.-1 at a coating thickness of 0.1 mm due to the infrared absorption due to the stretching and vibration of SiH. The coating of cured silicone rubber contains a neglibible amount of SiH so that the transmission loss of the optical fiber can be prevented from increasing over a long period of time.
摘要翻译： 二氧化硅系材料的光纤包括覆盖其外表面的固化硅橡胶的涂层。 固化的硅橡胶涂层在进行红外光谱测量时，由于拉伸的红外吸收，涂布厚度为0.1mm，波数为2100〜2200cm -1，透光率为70％以上 和SiH的振动。 固化的硅橡胶的涂层含有可负的量的SiH，从而可以防止光纤的传输损耗在长时间内增加。
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公开(公告)号：US4114981A
公开(公告)日：1978-09-19
申请号：US797389
申请日：1977-05-16
CPC分类号： G02B6/4402
摘要： An optical fiber for communication comprises an optical fiber covered with a coating of a high-molecular elastomer having a flexural modulus of not less than 200 kg/cm.sup.2 at room temperature, the difference between the flexural moduli of said elastomer at room temperature and about -50.degree. C being not more than 1000 kg/cm.sup.2.
摘要翻译： 用于通信的光纤包括在室温下用挠曲模量不小于200kg / cm 2的高分子弹性体涂层覆盖的光纤，所述弹性体在室温下的挠曲模量与约 - 50℃不超过1000kg / cm2。
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3.发明授权
公开(公告)号：US4812014A
公开(公告)日：1989-03-14
申请号：US047357
申请日：1987-05-06
摘要： A water penetration-detecting apparatus includes an optical fiber sensor having an optical fiber, and a water-absorbent material disposed along the optical fiber in contiguous relation to the fiber. The water-absorbent material, when absorbing water, expands volumetrically so as to apply a pressure to an outer peripheral surface of the optical fiber to bend the fiber. A detecting means is connected to the optical fiber sensor for detecting a bending of the optical fiber.
摘要翻译： 透水检测装置包括具有光纤的光纤传感器和沿着光纤与纤维连续设置的吸水材料。 吸水材料在吸收水时容积膨胀，以向光纤的外周表面施加压力以使纤维弯曲。 检测装置连接到光纤传感器，用于检测光纤的弯曲。
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公开(公告)号：US4836639A
公开(公告)日：1989-06-06
申请号：US21097
申请日：1987-03-03
IPC分类号： G02B6/44
CPC分类号： G02B6/441 , G02B6/4402 , G02B6/4407 , G02B6/4432
摘要： An optical fiber cable includes a flexible pipe of a plastics material, and a group of optical fibers loosely mounted within an axial bore of the pipe and held in contact with an inner surface of a peripheral wall of the pipe. At least one elongated flexible reinforcing member is embedded in the peripheral wall of the pipe and extends along a longitudinal axis of the cable, the reinforcing member being disposed in the vicinity of the group of optical fibers and made of a material having a higher Young's modulus than that of the plastics material of which the pipe is made. The optical fiber cable has a neutral axis extending through the bore of the pipe and defining a line of zero stress when the cable is bent longitudinally in a direction to dispose the reinforcing member radially inwardly of the group of optical fibers. The group of optical fibers are disposed on the neutral axis, so that the optical fibers are not subjected to axial contraction or elongation when the cable is bent in the direction.
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