A laser-based hydrogen (H2) sensor using wavelength modulation spectroscopy (WMS) was developed for the contactless measurement of molecular hydrogen. The sensor uses a distributed feedback (DFB) laser to target the H2 quadrupole absorption line at 2121.8 nm. The H2 absorption line exhibited weak collisional broadening and strong collisional narrowing effects. Both effects were investigated by […]

We are pleased to share our latest research article, “𝗦𝗲𝗻𝘀𝗶𝗻𝗴 𝗼𝗳 𝗺𝗼𝗹𝗲𝗰𝘂𝗹𝗮𝗿 𝗛𝘆𝗱𝗿𝗼𝗴𝗲𝗻 𝘂𝘀𝗶𝗻𝗴 𝗱𝗶𝗿𝗲𝗰𝘁 𝗧𝘂𝗻𝗮𝗯𝗹𝗲 𝗗𝗶𝗼𝗱𝗲 𝗟𝗮𝘀𝗲𝗿 𝗔𝗯𝘀𝗼𝗿𝗽𝘁𝗶𝗼𝗻 𝗦𝗽𝗲𝗰𝘁𝗿𝗼𝘀𝗰𝗼𝗽𝘆” published in 𝘖𝘱𝘵𝘪𝘤𝘴 𝘌𝘹𝘱𝘳𝘦𝘴𝘴. In this study, we present precise laboratory measurements of molecular hydrogen with TDLAS, showing high sensitivity and excellent linearity over a wide concentration range. By using a multipass cell with an […]