title: A near-infrared spectrometer based on novel grating light modulators.
abstract: A near-infrared spectrometer based on novel MOEMS grating light modulators is proposed. The spectrum detection method that combines a grating light modulator array with a single near-infrared detector has been applied. Firstly, optics theory has been used to analyze the essential principles of the proposed spectroscopic sensor. Secondly, the grating light modulators have been designed and fabricated by micro-machining technology. Finally, the principles of this spectroscopic sensor have been validated and its key parameters have been tested by experiments. The result shows that the spectral resolution is better than 10 nm, the wavelength deviation is less than 1 nm, the deviation of the intensity of peak wavelength is no more than 0.5%, the driving voltage of grating light modulators array device is below 25 V and the response frequency of it is about 5 kHz. With low cost, satisfactory precision, portability and other advantages, the spectrometer should find potential applications in food safety and quality monitoring, pharmaceutical identification and agriculture product quality classification.
authors.affiliation: Key Lab of Opto-electronic Technology and Systems, Education Ministry of China, Chongqing, 400044, P.R. China; E-Mails:  slhuang@cqu.edu.cn (S.H.);  wn1983@163.com (N.W.);  jinzhu_0323@sina.com (Z.J.);  zhangjie@cqu.edu.cn (J.Z.);  wmchen@cqu.edu.cn (W.C.).
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
authors.forename: Shanglian
authors.initials: S
authors.lastname: Huang
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
authors.forename: Zhu
authors.initials: Z
authors.lastname: Jin
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
authors.forename: Weimin
authors.initials: W
authors.lastname: Chen