A Harbin Institute of Technology team proposes a mixed-frequency heterodyne demodulation architecture for dual-gas LITES sensing using a single quartz tuning fork. The sensor achieves low-crosstalk ...

Heterodyne detection in optical radar systems exploits the coherent mixing of a received signal with a stable local oscillator to down-convert high-frequency optical returns into easily processed ...

A research team led by professor GAO Xiaoming from Hefei Institutes of Physical Science (HFIPS) of Chinese Academy of Sciences (CAS) developed a near-infrared (NIR) dual-channel oxygen-corrected laser ...

Trace gas sensors are used in different fields. Light-induced thermoelastic spectroscopy (LITES) has extremely high sensitivity and offers non-contact measurement, attracting extensive research ...