Optical temperature sensing behavior of Ho³⁺ and Ho³⁺/Er³⁺ doped tellurite glasses are investigated in terms of fluorescence intensity ratio (FIR) method in the range of 298–558 K. Thermal studies reveal that proposed glasses are stable up to approximately 613 K. Optical thermometry investigations are carried out through temperature dependent up- and down-converted photoluminescence (PL) emissions. Richness of the up-converted PL spectrum provides versatility, therefore along with the down-conversion spectrum FIRs of four different emission band pairs are calculated and evaluated. Each pair demonstrates varying sensitivity values in the detectable temperature range. Pump power is altered in up-conversion regime from 0.45 to 0.90 W to investigate the rate of change of emission intensities. Reliability of the FIRs is confirmed after several heating-cooling cycles. Judd-Ofelt analysis is also adopted to estimate radiative properties and temperature sensing capabilities of the proposed glasses. The highest possible absolute and relative sensitivities are determined as 0.0172 K⁻¹ and 2.48 % K⁻¹, respectively indicating the potential of Ho³⁺/Er³⁺ doped tellurite glasses for their use in noninvasive optical temperature sensing applications.

Ho ³⁺和Ho ³⁺ / Er ^3+的光学温度感测行为用荧光强度比（FIR）方法研究了掺杂的碲酸盐玻璃，其范围为298–558K。热学研究表明，所提议的玻璃在大约613 K的温度下都稳定。光学测温研究是通过温度依赖性的下转换的光致发光（PL）发射。上转换PL频谱的丰富性提供了多功能性，因此，连同下转换频谱，可以计算和评估四个不同发射带对的FIR。每对显示在可检测温度范围内变化的灵敏度值。在上转换范围内将泵浦功率从0.45 W更改为0.90 W，以研究发射强度的变化率。多次加热-冷却循环后，确认了FIR的可靠性。还采用Judd-Ofelt分析来估计所提议眼镜的辐射特性和温度感应能力。确定的最高绝对和相对灵敏度为0.0172 K^-1和2.48％K ^-1，分别表明掺有Ho ³⁺ / Er ^3+的碲酸盐玻璃在无创光学温度传感应用中的潜力。