Abstract:
The disclosed method of making a mixed glass optical fiber exemplarily comprises providing a high-silica tube, and causing molten non-high silica glass to flow into the bore (12) of the tube by application of a pressure differential. In order to prevent cracking, the tube desirably has an outer diameter/inner diameter ratio of at least 5, preferably about 10 or even more, and an inner diameter of at most 1 mm. In a preferred embodiment, a conventional SiO 2 tube is partially collapsed to an inner diameter less than 1 mm, a quantity of a non-high-silica glass is placed in a neck of the partially collapsed tube and heated such that molten glass communicates with the reduced-diameter portion of the bore and can be drawn into the reduced-diameter portion by means of a vacuum. The resulting mixed glass body is then further stretched to result in a core rod of core diameter at most 0.3 mm. After overcladding the core rod with SiO 2 , fiber is drawn from the thus produced preform. A thus produced fiber with SiO 2 cladding and SiO 2 -Al 2 O 3 -La 2 O 3 -Er 2 O 3 core was used as an optical fiber amplifier and provided high gain.
Abstract translation:所公开的制造混合玻璃光纤的方法示例性地包括提供高硅石管,并且通过施加压差使得熔融的非高硅石玻璃流入管的孔(12)。 为了防止破裂,管理想地具有至少5,优选地约10或甚至更多的外径/内径比,以及至多1mm的内径。 在一个优选的实施方案中,常规的SiO2管部分塌陷至小于1mm的内径,将一定量的非高硅石玻璃置于部分塌陷的管的颈部并加热,使得熔融玻璃与 直径减小的部分并且可以通过真空吸入缩径部分。 然后将得到的混合玻璃体进一步拉伸以得到芯直径至多0.3mm的芯棒。 在用SiO 2包覆芯棒之后,从如此制造的预制棒中拉出纤维。 使用这样制造的具有SiO 2包层和SiO 2 -Al 2 O 3 -La 2 O 3 -Er 2 O 3芯的光纤作为光纤放大器并提供高增益。
Abstract:
A method and apparatus are provided for drawing a self-aligned core fiber free of surface contamination and inserting the core fiber into a cladding material to make an optical fiber preform. Single or multi-mode optical fibers having high quality core-clad interfaces can be directly drawn from the preforms described herein.
Abstract:
5n7 Disclosed is a method and apparatus for drawing an elongated glass article (32) such as a fiber optic device. The article (32) is drawn upwardly from a source (28) through the surface of a quantity of molten metal (21) having a vertical temperature gradient. The source can be an elongated solid glass preform (28) that is vertically positioned within the molten metal (21) such that the temperature of that portion of the molten metal adjacent the upper end region is sufficiently high to heat that region to drawing temperature. The upper end region (29) is pulled to form a tapered root, continued pulling resulting in the formation of an elongated article (32) from the small diameter root end. The relative position of the root is maintained with respect to the surface of the molten metal during the drawing operation. Alternatively, the glass can be drawn from an orifice located within the molten metal. The apparatus includes container means (11,12) for supporting the molten metal (21), and external or internal means (22,23) for heating and/or cooling portions of the molten metal (21). The container (11,12) can also be provided with baffle means for dividing the container into a plurality of chambers.
Abstract:
Solid or hollow infrared optical fiber of high stability and small light transmission loss is produced from halides and/or hydrides of elements constituting calcogenide glass as starting materials by MCVD process with less chance for contamination with impurities and with unnecessity for melting for a prolonged time for homogenization.
Abstract:
Glass includes an aggregate of solid electrolyte particles including Li, P, and S, wherein when a Raman spectrum of the glass is repeatedly measured and a peak at 330 to 450 cm -1 in each Raman spectrum is separated to waveforms of individual components, a standard deviation of a waveform area ratio of each component is less than 4.0.
Abstract:
In accordance with the present invention, a system and method for the automated casting of infrared glass optical components is provided. The system includes a mold for casting infrared glass into lenses, a mold chamber operable to heat the mold to a temperature above the melting temperature of the infrared glass, and a casting chamber operable to fill the mold with molten infrared glass. The method includes heating a mold in a mold chamber (70) to a temperature above the melting temperature of infrared glass, casting molten infrared glass into the mold in a casting chamber (71); and cooling the mold to a temperature below the glass transition temperature of the infrared glass.
Abstract:
A method of forming a nanowire is disclosed. In one embodiment, a primary preform is formed comprising at least one central region and a support structure. The primary preform is then drawn to a cane, which is then inserted into an outer portion, to form a secondary preform. The secondary preform is then drawn until the at least one central portion is a nanowire. The method can produce nanowires of far greater length than existing methods, and can reduce the likelihood of damaging the nanowire when handling.
Abstract:
A system and method for preparing chalcogenide glass are provided that allow for larger quantities of glass to be produced with lower production costs and less risks of environmental hazards. The system includes a reaction container operable to hold chalcogenide glass constituents during a glass formation reaction, a stirring rod operable to mix the contents of the reaction container, a thermocouple operable to measure the temperature inside the reaction container, and a reaction chamber operable to hold the reaction container. The method includes placing chalcogenide glass constituents in a reaction container, heating the chalcogenide glass constituents above the melting point of at least one of the constituents, promoting dissolving or reaction of the other constituents, stirring the reaction melt, maintaining an overpressure of at least one atmosphere over the reaction melt, and cooling the reaction melt to below the chalcogenide glass transition temperature.