Phosphine (PH3) – a possible biosignature on rocky planets – was detected in significant quantities in Venus’ atmosphere. With absorption spectra in the mid-IR, Alpes Lasers QCLs are uniquely suited for measuring phosphine even at extremely low concentrations. See how our QCLs have recently been used to measure PH3 concentrations.
![](http://staging.alpeslasers.ch/wp-content/uploads/2021/11/600px_venus_globe.jpg)