Design of a grating-assisted silicon hybrid mode-, polarization-, and wavelength-division (De)multiplexer for on-chip optical interconnects

Manoranjan Minz; Ramesh Kumar Sonkar

doi:10.1364/AO.452497

Applied Optics
Vol. 61,
Issue 11,
pp. 3096-3100
(2022)
•https://doi.org/10.1364/AO.452497

Design of a grating-assisted silicon hybrid mode-, polarization-, and wavelength-division (De)multiplexer for on-chip optical interconnects

Manoranjan Minz and Ramesh Kumar Sonkar

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Manoranjan Minz and Ramesh Kumar Sonkar, "Design of a grating-assisted silicon hybrid mode-, polarization-, and wavelength-division (De)multiplexer for on-chip optical interconnects," Appl. Opt. 61, 3096-3100 (2022)

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Abstract

This paper presents a 12-channel hybrid mode-, polarization-, and wavelength-division (de)multiplexer. The proposed device is designed on a silicon-on-insulator platform. The device structure constitutes three coupling sections with a bus waveguide at the middle and two single-mode waveguides on each side. The periodic grating structures are present in between the waveguides for contra-directional coupling of the three TE modes and three TM modes of the bus waveguide to respective fundamental modes of the single-mode waveguides at 1550 and 1560 nm. The device is simulated using the 3D finite-difference time-domain technique, and the resulting insertion loss, cross talk, and return loss are ${\lt}{1.56}\;{\rm{dB}}$, ${\lt}- {21.74}\;{\rm{dB}}$, and ${\gt}{12.22}\;{\rm{dB}}$, respectively. Moreover, the period of the grating structures is varied to perform the fabrication tolerance study.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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Parameter	Value (nm)	Parameter	Value (nm)
$w_{O 1}$ , $w_{O 5}$ , $w_{O 9}$ , $w_{O 11}$	350	$Λ_{3}$	318
$w_{O 2}$ , $w_{O 3}$ , $w_{O 6}$ , $w_{O 7}$ , $w_{O 10}$ , $w_{O 12}$	400	$Λ_{4}$	320
$w_{O 8}$ , $w_{O 4}$	500	$Λ_{7}$	315
$g_{1}$ , $g_{2}$	900	$Λ_{5}$ , $Λ_{6}$ , $Λ_{11}$ , $Λ_{12}$	440
$g_{3}$ , $g_{4}$ , $g_{7}$ , $g_{8}$ , $g_{9}$ , $g_{10}$ , $Λ_{8}$	300	$Λ_{9}$	306
$g_{5}$	1000	$Λ_{10}$	297
$g_{6}$ , $g_{11}$ , $g_{12}$	800	$w_{A}$	2000
$Λ_{1}$ , $Λ_{2}$	450	$w_{B}$	1500
$w_{C 1}$ , $w_{C 2}$ , $g w_{1}$ , $g w_{2}$	600	$L_{c}$	$4 \times 10^{5}$
$t_{1}$ , $t_{2}$ , $t_{3}$	10,000	$g w_{5}$ , $g w_{11}$ , $g w_{12}$	650
$g w_{6}$	450	$g w_{3}$ , $g w_{4}$ , $g w_{7}$ , $g w_{8}$ , $g w_{9}$ , $g w_{10}$	180

Ref	Number of Channels	IL (dB)	CT (dB)
[1]	10 (10 modes)	$< 0.46$	$< - 11.4$
[28]	6 (3 modes, 2 wavelengths)	$< 0.55$	$< - 12.74$
[32]	8 (2 modes, 2 polarization, and 2 wavelengths)	$< 1.5$	$< - 18.7$
This work	12 (3 modes, 2 polarization, and 2 wavelengths)	$< 1.56$	$< - 21.74$

Parameter	Value (nm)	Parameter	Value (nm)
$w_{O 1}$ , $w_{O 5}$ , $w_{O 9}$ , $w_{O 11}$	350	$Λ_{3}$	318
$w_{O 2}$ , $w_{O 3}$ , $w_{O 6}$ , $w_{O 7}$ , $w_{O 10}$ , $w_{O 12}$	400	$Λ_{4}$	320
$w_{O 8}$ , $w_{O 4}$	500	$Λ_{7}$	315
$g_{1}$ , $g_{2}$	900	$Λ_{5}$ , $Λ_{6}$ , $Λ_{11}$ , $Λ_{12}$	440
$g_{3}$ , $g_{4}$ , $g_{7}$ , $g_{8}$ , $g_{9}$ , $g_{10}$ , $Λ_{8}$	300	$Λ_{9}$	306
$g_{5}$	1000	$Λ_{10}$	297
$g_{6}$ , $g_{11}$ , $g_{12}$	800	$w_{A}$	2000
$Λ_{1}$ , $Λ_{2}$	450	$w_{B}$	1500
$w_{C 1}$ , $w_{C 2}$ , $g w_{1}$ , $g w_{2}$	600	$L_{c}$	$4 \times 10^{5}$
$t_{1}$ , $t_{2}$ , $t_{3}$	10,000	$g w_{5}$ , $g w_{11}$ , $g w_{12}$	650
$g w_{6}$	450	$g w_{3}$ , $g w_{4}$ , $g w_{7}$ , $g w_{8}$ , $g w_{9}$ , $g w_{10}$	180

Ref	Number of Channels	IL (dB)	CT (dB)
[1]	10 (10 modes)	$< 0.46$	$< - 11.4$
[28]	6 (3 modes, 2 wavelengths)	$< 0.55$	$< - 12.74$
[32]	8 (2 modes, 2 polarization, and 2 wavelengths)	$< 1.5$	$< - 18.7$
This work	12 (3 modes, 2 polarization, and 2 wavelengths)	$< 1.56$	$< - 21.74$

Abstract

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Applied Optics