The dual mode optical thermometry offers precise temperature sensing with self-calibration merit. To realise this, an oxy-fluoride precursor glass was transformed to a semi-transparent glass-ceramic having simultaneously precipitated SrF₂:Yb³⁺/Er³⁺ and ZnAl₂O₄:Cr³⁺ phases. Under 980 nm excitation, intense green up-conversion (UC) luminescence of Er³⁺: ²H_11/2, ⁴S_3/2 → ⁴I_15/2 and under 535 nm excitation, enhanced red down-conversion (DC) luminescence lifetime of Cr³⁺: ²E, ⁴T₂ → ⁴A₂ was realized. Both the UC and DC transitions were highly reliant upon temperature. The fluorescence intensity ratio (FIR) study of erbium's thermally coupled energy states (²H_11/2 and ⁴S_3/2) produced maximum temperature sensing sensitivity values of 1.11% K⁻¹ at 334 K and 0.66% K⁻¹ at 275 K, respectively. Likewise, temperature dependent luminescence lifetime of Cr³⁺ attributed to the transitions arising from the parity forbidden (²E → ⁴A₂) and spin allowed (⁴T₂ → ⁴A₂) relaxations produced maximum temperature sensing sensitivity value equal to 0.19% K⁻¹ at 435 K.

双模光学测温仪具有自校准功能，可提供精确的温度感应。为了实现这一点，将氟氧化物前体玻璃转变为具有同时沉淀的SrF ₂：Yb ³⁺ / Er ³⁺和ZnAl ₂ O ₄：Cr ³⁺相的半透明玻璃陶瓷。下980nm的激发，铒的强烈绿色上转换（UC）的发光³⁺：² ħ _11/2，⁴小号_{3/ 2}  →  ⁴我_15/2和下535nm处激发，增强红色向下转换（DC） Cr ^3+的发光寿命：实现了² E，⁴ T ₂  →  ⁴ A ₂。UC和DC转换都高度依赖于温度。的热耦合能态（² H _11/2和⁴ S _3/2）的荧光强度比（FIR）研究产生的最大温度感测灵敏度值在334 K时为1.11％K ^-1，在275 K时为0.66％K ^-1分别为K。同样，Cr ^3+的依赖温度的发光寿命归因于禁止奇偶校验（² E→  ⁴ A ₂）并允许自旋（⁴ T ₂  →  ⁴ A ₂）松弛产生的最大温度感测灵敏度值在435 K时等于0.19％K ^-1。