Highly Sensitive CH 4 /C 2 H 2 Dual-Component TDLAS Sensor Based on a Dual-Channel Hexagram Multi-Pass Cell. - Liang, Xinyu; Sun, Xiaorong; Sun, Haiyue; Wang, Runqiu; Qiao, Shunda; He, Ying; Ma, Yufei (Sensors (14248220), 2026)