Review of Further Advancement in Pound-Drever-Hall (PDH) Technology Development

Due to instability caused by uncontrollable factors such as temperature change and minor vibrations, as well as line broadening, traditional laser devices often fail to produce a steady output suitable for high-precision applications. Now Pound-Drever-Hall (PDH) technology can help take a shortcut in this area. This research focuses on previously published studies that modify PDH technology, primarily aimed at enhancing the range or precision of laser stabilization, while also gathering insights from further research in this field. Concentrating on the main progress for the advancement in PDH technology, this research use data and paper available to conclude, compare, and integrate so that more advanced researches can have better usage for improvement and application. Particularly, most cases each now is still looking for a specific point that can further improve the technique to make the output more stable and as accurate as expected. But if those specific points are combined in the future, the adaptability and practicality can be largely improved, there can be lasers fit to current needs for high-precision stable laser instrument which is able to keep working for quite a long time.