This work was supported by the National Basic Research Program of China (No.2013BAK12B00 and No.2013CB834602) and the National Natural Science Foundation of China (No.21225314 and No.21427804).
Moisture measurement is of great needs in semiconductor industry, combustion diagnosis, meteorology, and atmospheric studies. We present an optical hygrometer based on cavity ring-down spectroscopy (CRDS). By using ...