研究了一种硅光子芯片空间光耦合系统，简化了集成光子芯片用光纤阵列耦合的方式，通过将1550 nm附近波段的光通过空间光学系统，经光栅耦合器垂直耦合进入集成光子芯片，经过波导与微环谐振腔实现光学传感，采用多模光纤收集出射能量，并进行温度传感测试。实验结果表明，用波长探测方式，得到自由光谱范围（FSR）为0.85 nm，Q值为16321的环形谐振腔直通端透射谱线。在温度传感测试中，其灵敏度达到127 pm/℃。通过进一步对比测试表明，空间光耦合与光纤阵列光耦合只在插入损耗方面有所差距，耦合系统可得到较好的温度传感测试结果。空间光耦合具有更换传感器芯片便捷，容易实现多通道测试等优点。

白光发光二极管（LED）在固态照明中应用广泛，其中蓝色荧光粉因发挥十分重要的作用而成为当前研究的热点。本文采用高温固相法合成了KYBaSi₂O₇∶Bi³⁺蓝色荧光粉，研究了材料的发光特性。结果显示，在370 nm光激发下，KYBaSi₂O₇∶Bi³⁺呈现出覆盖380~600 nm、主峰位于418 nm的不对称宽带发射；Bi³⁺离子的发光存在浓度猝灭现象；温度升高时，材料表现出了较好的温度稳定性，在400 K时仍能保持64%的初始强度。此外，将其和商用荧光粉以及370 nm的近紫外芯片结合制成了白光LED，其色坐标为（0.368 2，0.398 1），色温为4 463 K，表明利用该材料可以实现近紫外基白光LEDs。

Based on the Vernier effect of the cascaded double ring resonator (CDRR) sensor, a sensor consisting of a microfluidic control system, a sensing ring, and a reference ring with a micro-heater for thermal tuning is proposed in this paper. In wavelength interrogation, a broadband spectrometer or a large tunable range laser is not required. The shift of the output spectrum caused by the refractive index change of the sample is converted into the change of the electric power by the thermal tuning heater. Due to the Vernier effect, the sensitivity of the sensor is 20 times higher than that of the single ring. The spectral envelope of the thermal-optic tuning of the sensor was fitted by a Gaussian function in the wavelength range of 8 nm. The experimental results showed that the sensitivity was 33.703 W/RIU, and the limit of detection was 1.34×10-5RIU.