Abstract:
A hermetically sealed optical fiber product comprising a fluoride or other non-silica based glass optical fiber and a hermetic coating of carbon, a metal, a fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to the optical fiber product.
Abstract:
Neodymium-doped fluoroaluminate optical glass has a composition: 35 to 45 mol% AlF3; 5 to 30 mol% RF2, where R is selected from the group consisting of Ca, Mg, Sr and Ba; 5 to 25 mol% MF, where M is selected from the group consisting of Na, Li, K and Rb; and 0.001 to 10 mol% NdF3 dopant.
Abstract:
A heavy metal fluoride glass composition for an optical fiber in mole percent, about: 20 to 40 % InF3, 20 to 0 % GaF3, 2 to 10 % PbF2, 0 to 25 % ZnF2, 0 to 25 % CdF2, 10 to 25 % BaF2, 0 to 6 % NaCl, 0 to 6 % NaF, 0 to 7 % SrF2, and 0 to 5 % CaF2; the total of InF3 and GaF3 being about 40 %; the total of BaF2, SrF2 and CaF2 being about 25 %; the total of ZnF2 and CdF2 being about 25 %, and the total of NaCl and NaF being about 6 %; said composition being further doped with a lanthanide series heavy metal fluoride in an amount up to about 1 %.
Abstract:
The purpose of the invention is heavy metal oxide thin films and their applications. These thin films will serve to produce doped and undoped planar wave-guides and planar lightwave circuit (PLC) for passive and active optical devices (amplifier, laser, filter, multiplexer, attenuators and….). These thin films present low loss, good chemical and thermal stability and wide optical transmission window, high solubility of all rare earth ions and transition metals ions…. They can be deposited on different substrates.
Abstract:
High index-contrast fiber waveguides, materials for forming high index-contrast fiber waveguides, and applications of high index-contrast fiber waveguides are disclosed.
Abstract:
A method of determining the magnitude of an exceptionally large current in a conductor (4) which comprises measuring the angle of rotation of polarized light (6, 7, 8) from a light source (1, 2) in a magnetic field created by the current with a glass fiber (3) sensor composed of a fluoride glass having a low Verdet constant and a photoelastic coefficient not over about 0.25 (nm/cm)/(kg/cm ).
Abstract translation:一种确定导体(4)中特大电流的大小的方法,包括在由所述导体(4)产生的磁场中测量来自光源(1,2)的偏振光(6,7,8)的旋转角度 电流与玻璃纤维(3)传感器组成,氟玻璃具有低的Verdet常数和不超过约0.25(nm / cm)/(kg / cm 2)的光弹性系数。
Abstract:
An optical fiber used for an optical amplifier, which is formed by doping glass with rare-earth ions. Both praseodymium ions (Pr ) and erbium ions (Er ) are used as the rare-earth ions, and the glass is a fluoride glass or a sulfide glass. The optical fiber can be used at both wavelengths of 1.3 mu m and 1.55 mu m. The light amplification efficiency of an optical amplifier made of the optical fiber can be improved compared to an optical amplifier formed of only Pr or only Er .
Abstract:
An optical fibre amplifier is formed from glass doped with praseodymium. The glass may include one or more of cadmium mixed halide, hafnium halides, germanium and silicon disulphide based vitreous materials or fluorozirconate glass fibres. It is possible to provide an optical fibre amplifier which operates at a 1300 nm window for passive optical networks.