A novel tapered quartz tuning fork-based laser spectroscopy sensing

A novel tapered quartz tuning fork (QTF) was designed to enhance its stress magnitude and charge distribution in QTF-based laser spectroscopy, which had a low resonant frequency of 7.83 kHz and a wide fork gap for long energy accumulation time and easy optical alignment. Compared to the reported rectangular QTF, this tapered QTF transfers the maximum stress position from the root to the middle to improve its sensing performance. Furthermore, the unique design eliminates the 90° right angles typically found in standard QTFs, which often lead to undesired “webs” and “facets” during the etching process. This design minimizes performance degradation by reducing the presence of residual unexpected materials.…

• NN
  National Natural Science Foundation of China

  Awards: 62405078, 62275065, 62335006, 62022032
• HP
  Heilongjiang Provincial Postdoctoral Science Foundation

  Award: LBH-Z23144
• FR
  Fundamental Research Funds for the Central Universities

  Award: HIT.OCEF.2023011