Opt Lett. 2023 Feb 15;48(4):924-927. doi: 10.1364/OL.479193.
In this paper, we research the temperature stability of silicon-based ring resonator thermometers utilizing the Pound-Drever-Hall (PDH) technique. A slight temperature fluctuation of 12.2 mK in 200 s was experimentally detected by immersing the sensor in the triple point of water (TPW) system with ultrahigh precision. Additionally, factors that affect temperature stability, including fundamental thermal noise, laser frequency drift, and power fluctuation were analyzed and calculated theoretically. This shows high consistency with experimental results. Moreover, it is proved that the laser drift can be suppressed from 11.3 pm to 0.013 pm with the developed experimental system based on the PDH technique. The silicon-based ring resonator as a potential platform for precise temperature monitoring is proved based on this work.
在本文中，我们研究了利用 Pound-Drever-Hall（PDH）技术的硅基环形谐振器温度计的温度稳定性。通过将传感器浸入具有超高精度的三相点水（TPW）系统中，实验检测到了 200 秒内 12.2mK 的微小温度波动。此外，还从理论上分析和计算了影响温度稳定性的因素，包括基本热噪声、激光频率漂移和功率波动。这与实验结果高度一致。此外，实验结果表明，基于 PDH 技术的实验系统可以将激光漂移从 11.3pm 抑制到 0.013pm。基于这项工作，证明了硅基环形谐振器作为精确温度监测的潜在平台。
