公开(公告)号：US5558693A

公开(公告)日：1996-09-24

申请号：US319394

申请日：1994-10-06

Applicant: Arnab Sarkar

Inventor： Arnab Sarkar

IPC: C03B37/014 ,  C03B37/08

CPC classification number: C03B37/0148 ,  C03B37/014 ,  C03B37/0142 ,  C03B37/01446 ,  C03B37/01486 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2203/24 ,  C03B2203/26 ,  C03B2207/06 ,  C03B2207/12 ,  C03B2207/20 ,  C03B2207/36 ,  C03B2207/54 ,  C03B2207/60 ,  C03B2207/64 ,  C03B2207/70

Abstract: Low attenuation, low dispersion of optical waveguides are provided by a process initiating with axial deposition of a high velocity core soot stream impinging on, a target at a high angle of incidence relative to the axis of rotation of the target. A core cylinder is built up axially by relative movement between the soot stream and target during deposition, the movement being non-constant in order to maintain a substantially constant diameter with a constant deposition rate. A cladding layer is then built up by deposition of soot radially on the core. Subsequent drying and sintering provides a vitreous preform which may be drawn directly into optical waveguides. Alternatively, the sintered product may be drawn down to smaller rods, which then are covered with further deposited soot cladding to a desired final thickness, and after further drying and sintering may be drawn to optical waveguides.

Abstract translation: 光波导的低衰减，低色散是通过以相对于目标的旋转轴线以高入射角冲击目标的高速核心烟灰流的轴向沉积开始的过程来提供的。 在沉积期间通过烟灰流和靶之间的相对运动轴向地建立芯筒，该运动是不恒定的，以便以恒定的沉积速率保持基本上恒定的直径。 然后通过将烟灰放射在芯上沉积来形成包覆层。 随后的干燥和烧结提供可以直接拉入光波导的玻璃状预制件。 或者，烧结产品可以被拉伸到较小的杆，然后用另外沉积的烟灰覆层覆盖到所需的最终厚度，并且在进一步干燥和烧结之后，可以将其吸引到光波导。

公开(公告)号：US5343633A

公开(公告)日：1994-09-06

申请号：US28961

申请日：1993-04-29

Applicant: Shiho Wang ,  Fikret Kirkbir ,  Satyabrata Raychaudhuri ,  Arnab Sarkar

Inventor： Shiho Wang ,  Fikret Kirkbir ,  Satyabrata Raychaudhuri ,  Arnab Sarkar

IPC: C01B33/158 ,  C03B8/02 ,  C03B19/12 ,  C04B35/00 ,  F26B3/04 ,  F26B5/00 ,  F26B7/00 ,  F26B21/14 ,  F26B13/30

CPC classification number: C03B19/12 ,  F26B21/14 ,  F26B3/04 ,  F26B5/005 ,  F26B7/00

Abstract: A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical temperatures without inducing any cracking of the gel. The wet gel is immersed in a liquid solvent in a chamber, and the liquid solvent is then heated and expelled from the chamber. Further heating, with or without the presence of a flowing inert gas, fully dries the wet gel. When an inert gas is used, the gas is delivered to the chamber with a controlled solvent partial vapor pressure, to correspondingly control the driving force for drying the gel.

Abstract translation: 描述了一种方法和装置，用于在亚临界温度下快速干燥玻璃或陶瓷的湿多孔凝胶整料，而不引起凝胶的任何裂化。 将湿凝胶浸入室内的液体溶剂中，然后将液体溶剂从室中加热并排出。 进一步加热，有或没有流动的惰性气体的存在，将湿凝胶完全干燥。 当使用惰性气体时，气体以受控的溶剂部分蒸汽压力输送到室，以相应地控制干燥凝胶的驱动力。

公开(公告)号：US5243769A

公开(公告)日：1993-09-14

申请号：US904858

申请日：1992-06-26

Applicant: Shiho Wang ,  Fikret Kirkbir ,  Satyabrata Raychaudhuri ,  Arnab Sarkar

Inventor： Shiho Wang ,  Fikret Kirkbir ,  Satyabrata Raychaudhuri ,  Arnab Sarkar

IPC: C01B33/158 ,  C03B8/02 ,  C03B19/12 ,  C04B35/00 ,  F26B3/04 ,  F26B5/00 ,  F26B7/00 ,  F26B21/14

CPC classification number: C03B19/12 ,  F26B21/14 ,  F26B3/04 ,  F26B5/005 ,  F26B7/00

Abstract: A process and apparatus are described for rapidly drying a wet, porous gel monolith of glass or ceramic, at subcritical temperatures without inducing any cracking of the gel. The wet gel in immersed in a liquid solvent in a chamber, and the liquid solvent is then heated and expelled from the chamber. Further heating, with or without the presence of a flowing inert gas, fully dries the wet gel. When an inert gas is used, the gas is delivered to the chamber with a controlled solvent partial vapor pressure, to correspondingly control the driving force for drying the gel.

Abstract translation: 描述了一种方法和装置，用于在亚临界温度下快速干燥玻璃或陶瓷的湿多孔凝胶整料，而不引起凝胶的任何裂化。 将湿凝胶浸入室内的液体溶剂中，然后将液体溶剂从室中加热并排出。 进一步加热，有或没有流动的惰性气体的存在，将湿凝胶完全干燥。 当使用惰性气体时，气体以受控的溶剂部分蒸汽压力输送到室，以相应地控制干燥凝胶的驱动力。

公开(公告)号：US4599098A

公开(公告)日：1986-07-08

申请号：US579496

申请日：1984-02-13

Applicant: Arnab Sarkar

Inventor： Arnab Sarkar

IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  G02B6/02

CPC classification number: C03B37/01493 ,  C03B37/01466 ,  C03B2203/24 ,  Y02P40/57

Abstract: Low signal attenuation optical fibers and methods for making such fibers mimimize the internal and interface defects while providing high throughput by radial deposition of successive particulate layers about a small diameter start element and co-vitrification of the layers followed by drawing to the small final diameter that is desired. Radial vapor deposition of an interface layer on the start element, followed by an encompassing core and then a cladding provides boundaries that form transitional continuums after the structure has been vitrified. The start element remains as part of the core but is so small as to have no discernible effect on light propagation, and the number of interfaces in the light propagating portion is limited by maintaining the ratio of the cladding thickness to the core radius to less than 1.5 in the initial preform. By drawing this preform to form separate rods, additional cladding is applied to form a fiber preform from which optical fibers may be drawn.

Abstract translation: 低信号衰减光纤和制造这种纤维的方法可以模拟内部和界面缺陷，同时通过沿着小直径起始元件的连续颗粒层的径向沉积提供高产量，并且层的共同玻璃化，然后拉伸至最小直径 是希望的。 在起始元件上的界面层的径向汽相沉积，随后是包围的芯，然后是包层，在结构被玻璃化之后提供形成过渡连续体的边界。 起始元件保持作为核心的一部分，但是如此之小以至于对光传播没有明显的影响，并且通过将包层厚度与芯半径的比率保持为小于光限制，光传播部分中的界面数量受到限制 1.5初始预制件。 通过将该预型件拉伸以形成分开的杆，施加附加的包层以形成纤维预成型件，从该纤维预成型件可以拉制光纤。

公开(公告)号：US4310340A

公开(公告)日：1982-01-12

申请号：US172068

申请日：1980-07-24

Applicant: Arnab Sarkar

Inventor： Arnab Sarkar

IPC: C03B37/018 ,  C03B37/07 ,  C03B37/075

CPC classification number: C03B37/01807

Abstract: A glass optical waveguide preform is prepared by chemical reaction of vapor ingredients within a bait tube. As the reactants flow through the bait tube, a hot zone traverses the tube to cause the deposition of soot in a section of the tube just downstream of the hot zone. An axially disposed tubular burner, which is located just upstream from the hot zone, is mechanically coupled to the burner which generates the hot zone. The burner generates an axial water-free flame that extends through the hot zone. The flame creates a mandrel which confines the flow of reactants to an annular channel adjacent the bait tube wall in the hot zone. The flame also extends downstream from the hot zone where it increases the thermal gradient between the axis and the wall of the bait tube, thereby enhancing the thermophoresis effect, whereby deposition rate and efficiency are improved.

Abstract translation: 玻璃光波导预制件是通过诱饵管内的蒸汽成分的化学反应来制备的。 当反应物流过诱饵管时，热区穿过管，使得烟灰的一部分中的烟灰沉积在正好在热区的下游。 位于刚刚在热区上游的轴向设置的管状燃烧器机械地联接到产生热区的燃烧器。 燃烧器产生延伸穿过热区的轴向无水火焰。 火焰产生一个心轴，其将反应物的流动限制在邻近热区域中的诱饵管壁的环形通道。 火焰还从热区域的下游延伸，其中增加了诱饵管的轴和壁之间的热梯度，从而增强了热泳效应，从而提高了沉积速率和效率。

公开(公告)号：US4138193A

公开(公告)日：1979-02-06

申请号：US837015

申请日：1977-09-27

Applicant: Jerzy A. Olszewski ,  Arnab Sarkar

Inventor： Jerzy A. Olszewski ,  Arnab Sarkar

IPC: G02B6/44 ,  G02B5/16

CPC classification number: G02B6/4403

Abstract: The application of low loss optical fibers in optical communication systems requires that the glass fibers are suitably packaged into a cable. This invention provides a system of multiple optical fibers between two tapes or films, one of which holds the fibers on the film by pressure-sensitive adhesive and in spaced relation to one another. The fibers are covered by a second film, preferably thinner than the first film, and secured to the first film along the edges of the films to provide a laminated structure suitable for cabling. Spacers between the films eliminate asymmetric pressure of the covering film against the optical fibers which are nearest to the edges of the films; and the spacers are preferably strength members for stiffening the laminate.

Abstract translation: 在光通信系统中应用低损耗光纤需要将玻璃纤维适当地封装在电缆中。 本发明提供了一种在两个带或膜之间的多个光纤的系统，其中之一通过压敏粘合剂将纤维保持在膜上并且彼此间隔开。 纤维被第二膜覆盖，优选地比第一膜更薄，并且沿着膜的边缘固定到第一膜，以提供适于布线的层压结构。 膜之间的间隔消除了覆盖膜对最靠近膜边缘的光纤的不对称压力; 并且间隔件优选地是用于加强层压体的强度构件。