The success of the synthesis of the PEG TEFE silane was confirmed with (1)H NMR and Fourier transform infrared spectroscopy (FTIR).
TEFE硅烷的成功组装已经在（1）H NMR和傅里叶变换红外光谱（FTIR）分析中得到证实。
2
The properties of the product were characterized by thermogravimetry-differential thermal analysis, X-ray diffraction and Fourier infrared transmission spectroscopy.
用差热-热重分析、X射线衍射、红外光谱等手段对样品进行表征。
3
A fiber Bragg grating dispersion measuring system based on Fourier transform spectroscopy is designed and implemented.