Yingxin Luo

1 Introduction Alcohol consumption continues to be one of the major public health concerns globally, contributing significantly to both mortality and morbidity. According to the World Health Organization (WHO), alcohol is responsible for 4.6% of the overall disease burden and 6.7% of all premature deaths (1). Beyond its direct health consequences, alcohol consumption is often linked to risky behaviors, which can further worsen the burden of infectious diseases (1–3).

We propose and analyze the use of higher-order modes for Pound–Drever–Hall (PDH) frequency stabilization in compact ultrastable laser cavities. A spatial light modulation scheme is introduced to generate the ${{\rm HG}_{33}}$ mode with a theoretical efficiency of 56%, providing a practical method for exciting higher-order modes.