# Sub-ppb-level CH<sub>4</sub> detection by exploiting a low-noise differential photoacoustic resonator with a room-temperature interband cascade laser

> Research article (Optics Express, 2020) · cited 44× · AI/ML

**Wikidata**: [openalex:W3035070609](https://www.wikidata.org/wiki/openalex:W3035070609)  
**Source**: https://4ort.xyz/entity/sub-ppb-level-ch-sub-4-sub-detection-by-exploiting-a-low-noise-differential-photoacoustic-resonator-with-a-room-temperat