title: Path-folded infrared spectrometer consisting of 10 sub-gratings and a two-dimensional InGaAs detector.
abstract: A new compact infrared spectrometer without any mechanical moving elements has been designed and constructed using a two-dimensional InGaAs array detector and 10 sub-gratings. The instrument is compact, with a double-folded optical path configuration. The spectra are densely 10-folded to achieve 0.07-nm spectral resolution and a 2-ms data acquisition time in the 1450- to 1650-nm wavelength region, making the instrument useful for real-time spectroscopic data analyses in optical communication and many other fields.
authors.affiliation: State Key Laboratory of Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China.
authors.forename: Ming-Hui
authors.initials: MH
authors.lastname: Liu
authors.forename: Su-Xing
authors.initials: SX
authors.lastname: Pan
authors.forename: Yu-Rui
authors.initials: YR
authors.lastname: Chen
authors.forename: Yun-Fei
authors.initials: YF
authors.lastname: Wu
authors.forename: Qing-Yuan
authors.initials: QY
authors.lastname: Cai
authors.forename: Peng-Hui
authors.initials: PH
authors.lastname: Mao
authors.forename: Yu-Xiang
authors.initials: YX
authors.lastname: Zheng
authors.forename: Liang-Yao
authors.initials: LY
authors.lastname: Chen