Numerical design and analysis of a 3-channel grating assisted mode-division (de)multiplexer

Minz, Manoranjan; Sonkar, Ramesh Kumar

doi:10.1016/j.ijleo.2019.02.107

Cited by 9 publications

(1 citation statement)

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“…The diffraction theory or experimental fabrication of traditional gratings have been extensively studied [1][2][3][4]. By optimizing the grating profile parameters, the designed grating can be used in various fields, such as sensors [5], beam splitters [6][7][8], polarizers [9][10][11], filters [12][13][14], absorbers [15][16][17][18], and solar cells [19][20][21][22], etc. In recent years, with the development of ultra-precision optical devices and the improvement of multi-beam splitting in the optical system of lithography machines, multi-channel beam splitters have aroused wide interest among researchers in the production and application environment.…”

Section: Introductionmentioning

confidence: 99%

Compact silica-based equal nine-channel generated by triple-layer arrays

Fang

Wang

2021

Phys. Scr.

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In order to achieve the demands of multi-beam splitting in the optical communication system, a compact high-efficiency silica-based nine-channel beam splitter grating (BSG) at infrared wavelength is proposed based on a three-layer array structure. The grating profile parameters are investigated by the rigorous coupled-wave analysis (RCWA) and the finite-element method (FEM). The total efficiency of the nine-channel beam splitter reaches 96.98%, and the error of uniformity is reduced to 2.98%. The results show that the theoretical values of the two optimization methods are in good agreement. Moreover, the presented grating has a good performance against fabrication tolerances. The modal method is used for detailed physical explanation of the energy exchange and propagation modes inside the grating. The proposed high-efficiency nine-channel beam separation by three-layer arrays should be helpful for developing the multi-beam splitting of the optical system of the lithography machine and the new ultra-precision optical devices.

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