Abstract:
This invention relates to biocompatible and resorbable melt derived glass composition comprising: SiO 2 60-70 weight-%, Na 2 O 5-20 weight-%, CaO 5- 25 weight-%, MgO 0-10 weight-%, P 2 O 5 0.5-3.0 weight-%, B 2 O 3 0-15 weight-%, AI 2 O 3 0-5 weight-%, and comprising less than 0.05 weight-% potassium. This invention also relates to biocompatible and resorbable glass fibres manufactured from the glass compositions of the invention. This invention further relates to medical devices comprising fibres of the invention. This invention still further relates to use of the compositions of the invention for the manufacture of glass fibre and use of the fibres of the invention for the manufacture of medical devices.
Abstract:
An optical waveguide including a core having silica, Al, a non-fluorescent rare-earth ion, Ge, Er, and Tm. The non-fluorescent rare-earth ion may be La. Exemplary compositions concentrations are Er is from 15 ppm to 3000 ppm, Al is from 0.5 mol% to 12 mol%, La is less than or equal to 2 mol%, Tm is from 15 ppm to 10,000 ppm; and the Ge is less than or equal to 15 mol%. The core may further include F. An exemplary concentration of F is less than or equal to 6 anion mol%.
Abstract:
The specification describes fiber laser devices with cores containing aluminum in which the composition of the core (21) is modified to minimize the core Δ, thereby allowing a larger core diameter, and a reduction in the fiber laser length by a factor equal to the square of the diameter difference. This result is achieved by compensation doping the core (21) with phosphorus to offset the index-modifying contribution of aluminum.
Abstract:
This invention relates to the production of high purity fused silica glass through oxidation and/or flame hydrolysis of a halide-free, organosilicon-R compound in vapor form having the following properties:
(a) producing a gas stream of a halide-free silicon-containing compound in vapor form capable of being converted through thermal decomposition with oxidation or flame hydrolysis to SiO₂; (b) passing said gas stream into the flame of a combustion burner to form amorphous particles of fused SiO₂; (c) depositing said amorphous particles onto a support; and (d) either essentially simultaneously with said deposition or subsequently thereto consolidating said deposit of amorphous particles into a virtually nonporous body; the improvement comprising utilizing a halide-free, organosilicon-R compound in vapor form having the following properties:
(1) a Si-R bond dissociation energy that is no higher than the dissociation energy of the Si-O bond; (2) a boiling point no higher than 350°C; and (3) which, upon pyrolysis and/or hydrolysis, will produce decomposition products beside SiO₂ which are deemed to be environmentally safe or the emissions are below acceptable governmental standards.
Abstract:
유리-계 물품은, 적당한 깊이에서 더 높은 응력 값을 갖는 개선된 응력 프로파일을 갖는 유리-계 물품을 결과하는, 독특한 이온 교환 공정에 의해 제조된다. 이온 교환 공정의 매체는, 각 알칼리 금속의 이온이 기본 유리 조성물에서 알칼리 금속 산화물의 각각의 알칼리 금속의 각각과 화학적 평형에 있게 하는 비율로 유리-계 기판의 기본 조성물에서 둘 이상의 알칼리 금속 산화물의 둘 이상의 알칼리 금속의 이온을 포함한다.