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February 5, 20260 citations

Polarization-independent total-internal-reflection grism with 95% diffraction efficiency for wavelength selective switches

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SSSitong ShenLZLijiang ZengLLLifeng Li

Key Points

  • The research aims to develop a polarization-independent reflective grism for efficient wavelength selective switching.
  • Designed and fabricated a reflective grism with a line density of 1710 lines/mm.
  • Evaluated the grism's diffraction efficiency for TE and TM polarizations.
  • Tested performance over the C-band spectrum (1523-1575 nm).
  • Achieved an average diffraction efficiency of 95.14% for both TE and TM polarizations.
  • Demonstrated high line density and linear dispersion.
  • Showed potential for wide bandwidth applications in advanced optical technologies.

Abstract

A polarization-independent reflective grism consists of a polarization-independent total-internal-reflection grating and a prism. It can offer high line density, wide bandwidth and linear dispersion, promising potential application to next-generation wavelength selective switches. We designed and fabricated a grism of a line density of 1710 lines/mm. The average diffraction efficiency for TE and TM polarizations over the C-band (1523-1575 nm) is 95.14%.

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Cite This Study

Shen et al. (2025) studied this question.

synapsesocial.com/papers/698434dff1d9ada3c1fb3892https://doi.org/10.1051/epjconf/202533503039/pdf
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