Four-Concentric-Circle Multipass Cell

38 m Path

For methane sensors, achieves long optical path in compact volume, enhancing trace gas detection sensitivity.

Ma, Yufei · Yahui, Liu · He, Ying · Qiao, Shunda · Sun, Haiyue

Light: Advanced Manufacturing 2025

Specifications

Optical path length

{'zh': '约38', 'en': '~38'} m

光程与体积

{'zh': '13.8', 'en': ''} cm⁻²

甲烷检测限

{'zh': '322', 'en': ''} ppb

艾伦偏差下检测限

{'zh': '59.5', 'en': ''} ppb