A coma-free super-high resolution optical spectrometer using 44 high dispersion sub-gratings

Hua Tian Tu, An Qing Jiang, Jian Ke Chen, Wei Jie Lu, Kai Yan Zang, Hao Qi Tang, Osamu Yoshie, Xiao Dong Xiang, Young Pak Lee, Hai Bin Zhao, Yu Xiang Zheng, Song You Wang, Junpeng Guo, Rong Jun Zhang, Jing Li, Yue Mei Yang, W. D. Lynch, Liang Yao Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Unlike the single grating Czerny–Turner configuration spectrometers, a super-high spectral resolution optical spectrometer with zero coma aberration is first experimentally demonstrated by using a compound integrated diffraction grating module consisting of 44 high dispersion sub-gratings and a two-dimensional backside-illuminated charge-coupled device array photodetector. The demonstrated super-high resolution spectrometer gives 0.005 nm (5 pm) spectral resolution in ultra-violet range and 0.01 nm spectral resolution in the visible range, as well as a uniform efficiency of diffraction in a broad 200 nm to 1000 nm wavelength region. Our new zero-off-axis spectrometer configuration has the unique merit that enables it to be used for a wide range of spectral sensing and measurement applications.

Original languageEnglish
Article number1093
JournalScientific reports
Issue number1
Publication statusPublished - 2021 Dec

ASJC Scopus subject areas

  • General


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