Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Design of a Beam-coupling System for a Chip-integrated Spectrometer with a Discrete Linear Waveguide

  • Liu, Zhiying (Changchun University of Science and Technology, School of Opto-Electronic Engineering, Key Laboratory of Optoelectric Measurement and Optical Information Transmission Technology of Ministry of Education) ;
  • Jiang, Xin (Changchun University of Science and Technology, School of Opto-Electronic Engineering, Key Laboratory of Optoelectric Measurement and Optical Information Transmission Technology of Ministry of Education) ;
  • Li, Mingyu (Changchun University of Science and Technology, School of Opto-Electronic Engineering, Key Laboratory of Optoelectric Measurement and Optical Information Transmission Technology of Ministry of Education)
  • Received : 2019.12.19
  • Accepted : 2020.02.11
  • Published : 2020.06.25
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Abstract

In this study, a beam-coupling system is designed to improve the coupling efficiency of achip-integrated spectrometer when the waveguide is arranged in a linear and discrete manner. In the proposed system the beam is shaped to be anti-Gaussian, to deposit adequate energy in the edge waveguides. The beam is discretely coupled to the corresponding waveguide by a microlens array, to improve the coupling efficiency, and is compressed by a toroidal lens to match the linear discrete waveguides. Based on the findings of this study, the coupling efficiency of the spectrometer is shown to increase by a factor of 2.57. Accordingly, this study provides a reference basis for the improvement of the coupling efficiency of other similar spectrometers.

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References

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