200results about How to "Reduce optical loss" patented technology

The invention provides a preparation method of trivalent ytterbium ion doped lutetium-aluminum garnet transparent ceramic optical fibers. The method comprises the following steps: (1) carrying out ball milling on ytterbium doped yttrium-aluminum garnet powder prepared by coprecipitation, a sintering auxiliary agent, a surfactant and triple distilled water, and mixing to prepare water-based slurry; (2) preparing a gypsum micro-hole mold; (3) injecting the water-based slurry into the gypsum micro-hole mold, de-molding and drying to obtain a ceramic green body; (4) carrying out calcining treatment on the ceramic green body to obtain calcined fibers; (5) carrying out vacuum sintering on the calcined fibers; and (6) finally, annealing to obtain the Yb<3+> doped transparent lutetium-aluminum garnet transparent ceramic optical fibers. The transparent ceramic optical fibers prepared by adopting the preparation method have the relatively low optical loss and can be used for -1 micron near-infrared laser output and -1 micron near-infrared optical signal amplification. In the method, a slurry injection molding process is adopted; and compared with the prior art, for the method, the steps are simple and the cost is relatively low. A powder calcining process is adopted, the working temperature is relatively low and the energy loss is relatively small.