Keywords: 
• 双光梳光谱学 /
• 光学频率梳 /
• 傅里叶变换光谱学 /
• 中红外光谱学

Abstract: Dual-comb spectrometers possess the advantages of both high resolution and short measurement times, which make them powerful tools in studying molecular spectroscopy. This article explores the principles of dual-comb spectroscopy and makes a comparison with tradi-tional Fourier transform spectrometers. We then explain in detail both the structures and the mo-lecular absorption results of several typical dual-comb spectrometers. With the development of op-tical frequency combs and detector techniques in the mid-infrared region, dual-comb spectrosco-py is bound to be widely used in such fields as air pollution and breath gas detection in the near future.