Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry–Perot tunable filter
Li Yun-Long, Yang Bing-Chu†, , Xu Xue-Mei‡,
       

Linearity of the measurement system. The fitting is given by y = 0.0001(0.49x − 1) with 0.9907 fitting coefficient.