Investigation on morphology-dependent resonances in Er³⁺ doped phosphate glass microsphere with light quantum mechanics

The development of microspherical cavity theory is introduced, and the microspherical cavity is analyzed with light quantum mechanics. The 1533nm fluorescence spectrum of the Er3+ doped phosphate glass microsphere (about 15μm in diameter) was measured under laser excitation of 488nm. The phenomenon of the morphology-dependent resonances of the fluorescence spectrum in the glass microsphere and its formation mechanism were observed and analyzed. The fluorescence spectra of the Er3+ doped phosphate glass microsphere were compared with those of corresponding bulk glass. The single-mode oscillation amplitude generated by the Er3+ doped phosphate glass microsphere was obtained in the experiment.