Abstract:
A synthetic quartz glass for an optical member which is free from compaction and rarefaction is obtained. A synthetic quartz glass for an optical member to be used for an optical device employing a light having a wavelength of at most 400 nm and at least 170 nm as a light source, which contains substantially no oxygen excess defects, dissolved oxygen molecules nor reduction type defects, which has a chlorine concentration of at most 50 ppm and a OH group concentration of at most 100 ppm, and which contains oxygen deficient defects within a concentration range of at most 5 ~10¿14? defects/cm¿3? and at least 1 ~10¿13? defects/cm¿3?. The fluorine concentration is preferably at most 100 ppm.
Abstract translation:得到不含压实和稀释的用于光学构件的合成石英玻璃。 用于光学构件的合成石英玻璃,其用于使用波长最多为400nm且至少170nm的光作为光源的光学元件,其基本上不含氧过剩缺陷,溶解的氧分子或还原型 缺陷,其氯浓度最多为50ppm,OH基浓度为至多100ppm,并且在氧浓度范围内至多为5〜10×14×缺陷/ cm 3的含氧缺陷。 至少1〜10〜13? 缺陷/cm¿3?. 氟浓度优选为100ppm以下。
Abstract:
Ein bekanntes Rohr aus synthetischem Quarzglas für die Herstellung einer Vorform, weist eine Innenbohrung mit werkzeugfrei im Schmelzfluss erzeugter Oberflächenschicht sowie einen Innenbereich auf. Damit das Rohr keine OH-Gruppen an die Umgebung abgibt, wird erfindungsgemäss vorgeschlagen dass die Overchenschicht (30) eine Stärke von 10µm und darin einem mittleren OH-Gehalt von aximal5 Gew.-ppm sowie eine mittlere Oberflächenrauigkeit R a von maximal 0,1 µm, aufweist, und dass der an der Oberflächenschicht (30) beginnende und 10 pm vor der Außenwandung endende Innenbereich (34) einen mittleren OH Gehalt von maximal 0,2 Gew.-ppm aufweist. Ein einfaches und kostengünstiges Verfahren zur Herstellung eines derartigen Quarzglasrohres besteht darin, dass in einem Vertikalziehverfahren aus einer erweichten Quarzglasmasse kontinuierlich ein Rohrstrang gezogen wird, durch dessen Innenbohrung ein Spülgas im Durchfluss geleitet wird, das einen Wassergehalt von weniger als 100 Gew.ppb hat, und wobei das vordere Ende des Rohrstrangs (19) von einem für das Spülgas durchlässigen Strömungshindernis (26) verschlossen ist, der den Durchfluss des Spülgases (23) vermindert.
Abstract:
Es ist ein Verfahren zur Herstellung einer Vorform aus synthetischem Quarzglas mittels eines plasmaunterstützten Abscheideverfahrens bekannt, bei dem einem mehrdüsigen Abscheidebrenner ein wasserstofffreier Medienstrom enthaltend ein Glasausgangsmaterial und ein Trägergas zugeführt wird, das Glasausgangsmaterial mittels des Abscheidebrenners in eine Plasmazone eingebracht und darin unter Bildung von SiO 2 -Partikeln oxidiert wird, und die SiO 2 -Partikel auf einer Ablagerungsfläche abgeschieden und dabei direkt verglast werden. Um hiervon ausgehend die Abscheideeffizienz zu erhöhen, wird erfindungsgemäss vorgeschlagen, dass der Medienstrom mittels des Abscheidebrenners (1) in Richtung auf die Plasmazone (4) fokussiert wird. Ein zur Durchführung des Verfahrens geeigneter mehrdüsiger Plasmabrenner, der mit einer Mediendüse für die Zufuhr eines Medienstroms zu der Plasmazone versehen ist, zeichnet sich dadurch aus, dass die Mediendüse (7) fokussierend in Richtung auf die Plasmazone (4) ausgebildet ist. Die Fokussierung geschied mittels einer Verjüngung (6) der Mediendüse (7).
Abstract:
According to a previously known method for producing a cylindrical quartz glass body having a low OH content, first an elongate, porous soot body is produced on a rotating support by flame-hydrolyzing a silicon-containing compound and removing layers of SiO2 particles, whereupon said soot body is subjected to a dehydration treatment and is vitrified in a vitrification furnace. The aim of the invention is to create a simple method which is based on said method and makes it possible to produce a quartz glass cylinder having a low OH content while evenly distributing the OH concentration without additional technical complexity. Said aim is achieved by subjecting the soot body to a pretreatment in protective gas and/or a vacuum in the vitrification furnace following the dehydration treatment but prior to the vitrification thereof, the soot body being heated to a temperature ranging between 100 DEG C and 1350 DEG C in a heating area.
Abstract translation:用于使用150〜190nm波长的紫外线作为光源的单位的合成石英玻璃,其对紫外线的耐紫外线性优异,为150〜190nm。 用于150〜200nm波长的合成石英玻璃,其特征在于,在合成石英玻璃中,OH基浓度小于1ppm,氧过剩型缺陷的浓度为1×10 16个缺陷/ cm 3以下,氢分子的浓度小于1×10 17分子/ cm 3,非交联氧自由基的浓度在用氙准分子灯3kJ / cm 2照射后表现出 在10mW / cm 2的照射强度下,或以10mJ / cm 2 /脉冲的能量密度用F 2激光束进行10 <7>脉冲照射后的光为1×10 16 自由基/ cm 3以下。
Abstract:
An apparatus for transporting an optical signal is provided. The apparatus includes sections of optical fiber span with at least one section negative dispersion, negative slope fiber positioned at a distance from the output. A pump light emitting device optically coupled to the optical fiber span near the output is provided for generating an amplification signal.
Abstract:
An object of the present invention is to provide a quartz glass tube for optical fiber preforms capable of producing optical fiber preforms having high dimensional precision, excellent distribution of refraction index, and yet free from degradation and the like of working environment. The object above is accomplished by a quartz glass tube for use in the production of optical fiber preforms, characterized in that the high temperature viscosity thereof is varied in the wall thickness direction, and that the high temperature viscosity in the inner layer side is lower than that of the outer layer side. It is shown how the viscosity and the refractive index are influenced by different doping agents to optimize producing parameters for the optical fiber preform and the distribution of refraction index of the optical fiber preform obtained. A method for producing an optical fiber preform comprising inserting a core glass rod into said quartz glass tube and melt welding them together is also disclosed.
Abstract:
According to an embodiment of the invention a method of manufacturing optical fiber cane comprises the steps of: (i) providing a core rod manufactured of relatively low viscosity glass; (ii) depositing SiObased soot around the core rod to form a soot preform, the soot being of relatively high viscosity material such that the softening point of the low viscosity glass is at least 200°C lower than the viscosity of the high viscosity outer core region; and (iii) consolidating the soot of the soot perform by exposure to hot zone at temperatures of 1000°C-1600°C. The soot is consolidated by heating the outer portion of the soot perform at a relatively fast heating rate, the heating rate being sufficient to densify the soot, so as to render the densified material with enough rigidity to confine the heated core rod and to prevent the heated core rod from puddling.
Abstract:
본 발명은, 기포가 없는 투명한 내층과 기포를 함유하는 불투명한 베이스 몸체 또는 외층을 포함하는 적어도 2층 구조를 가지며, 적어도 상기 베이스 몸체는 0.0005~0.0065[kg/kg(건조가스)]의 수분혼합비를 갖는 가스 내에서 유지된 실리카 분말에 의해 형성됨을 특징으로 하는 실리콘 단결정 인상용 석영유리 도가니 제조방법과, 상기 제조방법으로 제조된 석영유리 도가니에 관한 것이다. 상기 얻어진 도가니는 50ppm 이하의 평균 OH 기 농도를 가지며 실리콘 단결정 인상중에 발생하는 진동을 억제할 수 있다. 또한 상기 얻어진 도가니는 상기 실리콘 단결정 인상시 도가니의 변형에 따른 어려움에 빠지지 않는다. 석영유리 도가니, 내층, 외층, 수분혼합비, OH 기 농도