Abstract:
In one embodiment, the present method involves reducing turbulence and friction during extrusion by moving an extrusion die in a direction opposite to that of the extruded fiber and against a stationary preform arrangement inside the extrusion chamber. In another embodiment, an AgCl x Br 1-x (x from 0 to 1) preform is doped with AgI or with a compound of the formula: -MY, wherein M is selected from Li, Na, K, Rb, Cs; or MY₂, wherein M is selected from Mg, Ca, Sr, Pb, Ba, Cd or Hg; and wherein Y is selected from Cl, Br, or I. The resulting fiber has a more even core/clad interface with a decrease in grain size towards the fiber surface and a grain texture elongated along the fiber axis. This structure together with strengthening and stabilizing dopants, added to the fiber material, gives decreased and stabilized optical losses and a higher elasticity of fibers.
Abstract translation:在一个实施方案中,本发明的方法涉及通过在与挤出纤维相反的方向上移动挤出模具并且抵靠在挤出室内部的固定的预成型件布置来减少挤出期间的湍流和摩擦。 在另一个实施方案中,AgCl x Br 1-x(x从0至1)预成型体掺杂AgI或与下式的-MY化合物掺杂,其中M选自Li,Na,K,Rb,Cs; 或MY2,其中M选自Mg,Ca,Sr,Pb,Ba,Cd或Hg; 并且其中Y选自Cl,Br或I.所得纤维具有更均匀的芯/包层界面,其具有朝向纤维表面的晶粒尺寸减小和沿着纤维轴线延长的晶粒结构。 这种结构与加强和稳定化的掺杂剂一起添加到纤维材料中,使得光纤损耗降低并且稳定,纤维的弹性更高。
Abstract:
An infrared optical fiber containing 30 to 70% by weight of silver chloride and silver bromide and having a diameter of not more than 0.35 mm has a high mechanical strength. Accordingly, even when this fiber is bent ten thousand times repeatedly at a curvature of 20 mm in radius, which constitutes the condition required of the infrared optical fiber when it is used in a human body, a decrease of the laser beam transmitting capacity thereof, which causes the infrared optical fiber to be burnt, does not occur. This fiber has excellent optical characteristics with respect to an outgoing beam. When a proper load is imposed on this fiber, a non-curved, i.e. linear infrared optical fiber having excellent optical characteristics with respect to an outgoing beam can be obtained. This enables an infrared optical fiber to be manufactured stably in a shorter period of time.
Abstract:
The process of manufacturing optical fibres for transmission in the medium infrared employs metal fluorides and chlorides obtained by the vapour-phase reaction, started at ambient temperature by UV radiation, between an organo-metallic compound and a fluorine or chlorine containing reactant. The apparatus for carrying out the process is also provided.
Abstract:
A process is disclosed for producing an infrared light transmitting optical fiber by drawing a rod of single crystal or polycrystalline metal halide into a fiber through a die; also disclosed is a process for producing an infrared light transmitting optical fiber of step-index type by forming around a single crystal or polycrystalline fiber core, an intimate cladding crystal layer having a lower refractive index than the core by working in the temperature range that does not cause recrystallization of the core or cladding during working.
Abstract:
A process is disclosed for producing an infra-red light transmitting optical fiber by drawing a rod of single crystal or polycrystalline metal halide into a fiber through a die; also disclosed is a process for producing an infrared light transmitting optical fiber of step-index type by forming around a single crystal or polycrystalline fiber core, an intimate cladding crystal layer having a lower refractive index than the core by working in the temperature range that does not cause recrystallization of the core or cladding during working.
Abstract:
(a) 반응 구역에서 탄소-함유 실리콘 화합물을 함유하는 원료를 산소와 반응시켜서, SiO 2 입자를 얻는 단계, (b) 상기 SiO 2 입자를 침전 영역에 침전시켜서, 수소 및 하이드록실기를 함유하는 다공성 SiO 2 수트체(soot body)를 형성하는 단계, (c) 상기 다공성 SiO 2 수트체를 건조하는 단계, 및 (d) 상기 수트체를 글레이징 온도(glazing temperature)까지 가열함으로써, 합성 석영 유리로 글레이징하는 단계를 포함하는 합성 석영 유리의 제조 방법이 개시된다. 탄소-함유 원료를 사용하여 탄소-함유 실리콘 화합물의 열분해(pyrolysing) 또는 가수분해(hydrolysing)에 의해 석영 유리의 비용 효율적인 제조를 용이하게 하는 방법 절차를 나타내기 위해, 본 발명은 1중량ppm 내지 50중량ppm 범위 내의 탄소 함량을 갖는 수트체의 제조를 설명한다.
Abstract:
An infrared optical fiber is provided which includes silver halide polycrystals having a composition ratio of silver chloride and silver bromide in the range of 30 to 70 percent by weight of silver chloride, and having an average grain size of 5 mu m or less. There also is provided a method of manufacturing such an infrared optical fiber, in which a silver halide single crystal having a composition ratio of silver chloride and silver bromide in the range of 30 to 70 percent by weight of silver chloride is extruded into an infrared optical fiber, while applying an extruding pressure of 70 kg/mm or more and a tensile load which is greater than the yield strength and smaller than the tensile strength.