Preparation method of ytterbium ion doped silicon dioxide laser microspheres

Abstract

The invention provides a preparation method of ytterbium ion-doped silicon dioxide laser microspheres, which comprises the following steps: respectively weighing tetraethyl orthosilicate, hexamethyldisiloxane and ethanol in certain molar weight according to a molar ratio, putting into a glass reactor, stirring at room temperature, weighing dilute nitric acid according to a volume ratio of the dilute nitric acid to a main material, putting into a small glass bottle, weighing ytterbium nitrate pentahydrate, adding the ytterbium nitrate pentahydrate into dilute nitric acid, dissolving with ultrasonic assistance, uniformly stirring, concentrating into gel, lightly inserting a thin glass rod into the gel, lifting a drawn wire, putting into a crucible, putting the crucible into a program control furnace, gradually heating, keeping for 10 minutes, and naturally cooling to obtain ytterbium ion doped glass fibers; and taking out the the glass fibers for laser processing to obtain the laser microspheres with handles. According to the method, ion doping is uniform, the method has a high optical quality factor, the doped microspheres have an ultralow laser threshold value, the chemical property is stable, the doped microspheres are non-toxic and provided with handles, and the diameters of the microspheres can be controlled within the range of 50-160 microns.

Description

technical field [0001] The present invention relates to SiO 2 The preparation technology of laser microspheres, in particular to a preparation method of uniform ytterbium ion-doped silicon dioxide laser microspheres, belongs to the technical field of laser communication. Background technique [0002] When a person whispers into a whispering gallery, another person can still hear what is being said even if they are far away from each other. This phenomenon is called "whispering galleries" (WG) phenomenon. Its essence is that the incident sound wave and the reflected sound wave resonate. Electromagnetic waves and light waves have the same phenomenon as sound waves. When light propagates in an optical fiber, if the fiber is bent, the position where the light propagates moves from the center of the fiber to the surface. If the path is bent below a certain minimum radius, the light undergoes continuous total internal reflection in the fiber, and the normal optical propagation ...

AI Technical Summary

Problems solved by technology

Among them, the microspheres formed by methods (1) and (2) are uniformly doped with ions; the microspheres formed by method (3) are difficult to control the uniformity and layer thickness of ion doping; the microspheres formed by method (1) do not contain The handle is difficult to manipulate and the diameter of the microsphere is difficult to control; method (2) is very difficult to process optical fibers with a diameter less than 60 μm, and can only be processed by laser