Scintillation and photoluminescence property of SiO_2 cladding YAP:Ce optical fiber via modified rod-in-tube method

A SiO2 glass-cladding YAP:Ce crystal fiber (SYCF) was fabricated using the modified rod-in-tube method. The inter-diffusion of Ce3+ between the YAP:Ce core and SiO2 glass cladding is investigated by an energy dispersive spectrometer and a refractive index profiler. Photoluminescence (PL) properties of both SYCF and fiber fabrication materials are compared. A wide PL band from 320 to 600 nm in SYCF is observed showing a different response when compared to YAP:Ce crystal material. The radiative life time of SYCF at 370 and 486 are approximately 29 and 61 ns, respectively. We confirm the PL center belongs to the Ce3+ in two types of YAP:Ce and SiO2 host using decay kinetics. In addition, the competition mechanism of Ce3+ ion transition from YAP to SiO2 is explained using a microstructural model. The scintillation and luminescence properties of SYCF indicate promising potential applications in remote radiative environment monitoring and in radiotherapy.

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