Three-channel (de)multiplexer for dense wavelength division (de)multiplexing based on a photonic crystal AAH cavity

Yuchen Hu; Heming Chen

doi:10.1364/JOSAB.458435

Journal of the Optical Society of America B
Vol. 39,
Issue 7,
pp. 1909-1918
(2022)
•https://doi.org/10.1364/JOSAB.458435

Three-channel (de)multiplexer for dense wavelength division (de)multiplexing based on a photonic crystal AAH cavity

Yuchen Hu and Heming Chen

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Yuchen Hu and Heming Chen, "Three-channel (de)multiplexer for dense wavelength division (de)multiplexing based on a photonic crystal AAH cavity," J. Opt. Soc. Am. B 39, 1909-1918 (2022)

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- Photonics
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About this Article
History
- Original Manuscript: March 14, 2022
- Revised Manuscript: June 6, 2022
- Manuscript Accepted: June 6, 2022
- Published: June 24, 2022

Abstract

We propose a three-channel (de)multiplexer for dense wavelength division (de)multiplexing based on a photonic crystal Aubry–André–Harper cavity. The transmission performance of the designed structure was modeled and analyzed according to coupled mode theory. The parameters of the proposed device are calculated using a three-dimensional finite-difference time-domain method for verification. Numerical results show that the minimum insertion loss and linewidth at operating wavelengths of 1556.2 nm, 1555.4 nm, and 1554.6 nm are 0.47 dB and 0.2 nm, respectively. The channel cross talk is lower than ${-}{16.23}\;{\rm{dB}}$. The (de)multiplexer has the advantages of low loss, small size [$19.35 \times 11.53\;({{\unicode{x00B5}}}{{\rm{m}}^2})$ per channel], and easy cascading structure, and can realize three-channel dense wavelength division (de)multiplexing with a channel spacing of 0.8 nm and be used in highly integrated large-capacity optical fiber communication systems.

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Parameter	Value	Parameter	Value
$a$ (nm)	430	$a_{1}$ (nm)	382
$r$ (nm)	130	$δ$ (nm)	191
$r_{1}$ (nm)	36	$r_{2}$ (nm)	120
$r_{3}$ (nm)	32	$r_{4}$ (nm)	118
$r_{a 1}$ (nm)	90	$r_{b 1}$ (nm)	87
$r_{a 2}$ (nm)	90.35	$r_{b 2}$ (nm)	88.5

	1556.2 nm	1555.4 nm	1554.6 nm
PORT	Port 1(IN)	Port 1-2(IN)	Port 3(IN)
Port 2(OUT)	0.49 dB	0.67 dB	0.66 dB

	1556.2 nm	1555.4 nm	1554.6 nm
PORT	Port 1(IN)	Port 1-2(IN)	Port 3(IN)
Port 1(OUT)	–	−24.45 dB	−28.62 dB
Port 1-2(OUT)	−32.8 dB	–	−17.64 dB
Port 3(OUT)	−28.74 dB	−25.9 dB	–

	1556.2 nm	1555.4 nm	1554.6 nm
PORT	Port 2(IN)	Port 2(IN)	Port 2(IN)
Port 1(OUT)	–	−27.3 dB	−20.98 dB
Port 1-2(OUT)	−36.07 dB	–	−16.23 dB
Port 3(OUT)	−58.9 dB	−32.9 dB	–

Reference	Cavity Type	Analysis Dimension	Transmission (max)	Cross Talk (min)	Q factor (max)	Footprint ( $µ m^{2}$ )	Linewidth	Channel Spacing	No. of Channels
[23]	Ring	2D	1	−38 dB	7790	434.56	0.2 nm	0.4 nm	8
[10]	F-P	2D	0.99	−18 dB	1200	790	1.48 nm	1.75 nm	8
[9]	L3	2D	0.849	–	5689.81	–	0.27 nm	–	–
[24]	Ring	2D	0.99	−34 dB	7758	481	0.2 nm	0.4 nm	4
[25]	Ring	2D	0.95	−25.7 dB	4525	288.5	0.6 nm	7.6 nm	2
[11]	WM	3D	0.5	–	40,000(theory)	440	–	0.2 nm	4
[12]	Ring	3D	0.6	−19 dB	6000	475	–	0.8 nm	2
This work	AAH	3D	0.898	−58.9 dB	7781	475	0.2 nm	0.8 nm	3

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