The invention discloses nano-
diamond /
tellurium germanate glass microspheres with NV (
Nitrogen Vacancy) center light emitting effect. A preparation method of the nano-
diamond /
tellurium germanate glassmicrospheres comprises steps as follows: (1), nano-
diamond is subjected to high-temperature annealing treatment, and the NV center is obtained; (2), nano-diamond /
tellurium germanate compound glass with the NV center is prepared from glass raw materials with a segmented melting method; (3), the compound glass is subjected to drawing, and glass fibers are obtained through drawing; (4), the glass fibers are subjected to thermal-insulation treatment, and the microspheres are obtained. The compound glass microspheres have quite small photo-induced
refraction change and good
optical stability, degree of eccentricity is smaller than 1%, and
surface smoothness is smaller than 1 nm. The tellurium germinate glass doped with a denitration catalyst has low
melting temperature and is high in
transmittance when the light emitting range of the NV center is 500-800 nm, NV
light intensity is high, the preparation method is simple, the cycle is short, besides, concentration of the doped nano-diamond ishigh, the glass microspheres are expected to be applied to NV center based
quantum communication devices and various high-sensitivity
physical quantity detectors, and integrated application of the glass microspheres can be possible.