Spectral resolution of the angle-tuned short wave infrared multichannel integrated spectrum assembly
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National Opto-Electronic Primary Metrology Laboratory, The 41st Research Institute of CETC,National Opto-Electronic Primary Metrology Laboratory, The 41st Research Institute of CETC,National Opto-Electronic Primary Metrology Laboratory, The 41st Research Institute of CETC,Advanced Research Center for Optics, Shandong University,Advanced Research Center for Optics, Shandong University;State Key Laboratories of Transducer Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences

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    Abstract:

    A novel short infrared multichannel integrated spectrum assembly ( MISA) worked in the range of 1 355 ~ 1 555 nm is reported. The influence of the incident angle on the center wavelength of each channel and the resolution of MISA is quantitatively studied in a theoretical and experimental manner.The experimental results show that the center wavelength of each channel of the spectroscopy component exhibits different degrees of short-wave direction shifting at 0 ~ 10° oblique incidence, and the degree of deviation is positively correlated with the incident angle. The theoretical and experimental center wavelength offset curves are plotted, and the experimental results show that the average shift amplitudes of the center wavelength at the incident angles of 5° and 10° are approximately 5. 7 nm and18. 67 nm, respectively. In addition, by referring to the experimental angle deviation curve, the spectrum was interpolated and integrated at two different incident angles, and the resolution of the spectral components was successfully increased from 7. 5 nm to 3 nm. Based on this experiment, we proposed a multi-channel angular tuning spectral assembly by changing the incident angle, and then using this method to improve the test resolution of the spectral components. This conclusion has certain guiding significance for designing the incident optical system and improving the test resolution of MISA.

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ZHUANG Xin-Gang, SHI Xue-Shun, WANG Heng-Fei, WANG Li-Li, FANG Jia-Xiong. Spectral resolution of the angle-tuned short wave infrared multichannel integrated spectrum assembly[J]. Journal of Infrared and Millimeter Waves,2018,37(3):332~337

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History
  • Received:November 24,2017
  • Revised:December 15,2017
  • Adopted:December 22,2017
  • Online: July 16,2018
  • Published: