Integrated athermal arrayed-waveguide grating multiplexer and demultiplexer with all-metal compensating rod for broadband temperature application

Xiaoping Wu; Chenglu Liu; Wen Liu; Changan Li; Zhilin Yuan; Chenggang Guan; Keyu Wu; Fengfan Tang; Yulan Min; Hui Chen; Wenjun Liu

doi:10.1364/AO.57.006207

Applied Optics
Vol. 57,
Issue 21,
pp. 6207-6212
(2018)
•https://doi.org/10.1364/AO.57.006207

Integrated athermal arrayed-waveguide grating multiplexer and demultiplexer with all-metal compensating rod for broadband temperature application

Xiaoping Wu, Chenglu Liu, Wen Liu, Changan Li, Zhilin Yuan, Chenggang Guan, Keyu Wu, Fengfan Tang, Yulan Min, Hui Chen, and Wenjun Liu

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Xiaoping Wu, Chenglu Liu, Wen Liu, Changan Li, Zhilin Yuan, Chenggang Guan, Keyu Wu, Fengfan Tang, Yulan Min, Hui Chen, and Wenjun Liu, "Integrated athermal arrayed-waveguide grating multiplexer and demultiplexer with all-metal compensating rod for broadband temperature application," Appl. Opt. 57, 6207-6212 (2018)

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Table of Contents Category
- Optical Devices, Sensors, and Detectors
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About this Article
History
- Original Manuscript: April 16, 2018
- Revised Manuscript: June 22, 2018
- Manuscript Accepted: June 22, 2018
- Published: July 19, 2018

Abstract

In this paper, a unique device that can act as both multiplexer and demultiplexer is proposed with two all-metal compensating rods that makes the compensated chip almost the same spectrum profile as the original one. In this way a flat-top athermal arrayed-waveguide grating module of $100 - GHz \times 40 - ch$ is successfully fabricated. A small center wavelength shift of $\pm 25 pm$ is achieved for the ultra-wide temperature range from $- 40 ° C$ to 85°C with the low insertion loss change of less than $\pm 0.14 dB$ .

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	All-Metal Rod	Bimetal Plate	Groove	All Polymer
Wavelength shift (pm)	$\pm 25$	$\pm 25$	$\pm 25$	$\pm 50$
Operation temperature (°C)	−40–85	25–77	0–85	25–65
IL (dB)	4.99	4.5	5.5	7.5
PDL (Polarization dependence loss) (dB)	0.25	0.29	0.26	0.23
BW at 1 dB (nm)	0.46	0.45	0.38	0.43
BW at 3 dB (nm)	0.63	0.62	0.56	0.59
BW at 20 dB (nm)	1.14	1.12	1.08	1.1
AX (dB)	34.3	34.5	30	32
NX (dB)	45.82	45.9	35	41

	The Normal Module	The Integrated Module
$Δ λ$ (pm)	−9	−8
IL (dB)	4.59	4.99
Ripple (dB)	0.33	0.37
PDL (dB)	0.24	0.25
BW at 0.5 dB (nm)	0.38	0.36
BW at 1 dB (nm)	0.47	0.46
BW at 3 dB (nm)	0.63	0.63
BW at 20 dB (nm)	1.15	1.14
AX (dB)	32.76	34.3
NX (dB)	44.49	45.82
TX (dB)	31.57	32.28
Size (mm)	$120 \times 70 \times 11$	$100 \times 45 \times 8$

	All-Metal Rod	Bimetal Plate	Groove	All Polymer
Wavelength shift (pm)	$\pm 25$	$\pm 25$	$\pm 25$	$\pm 50$
Operation temperature (°C)	−40–85	25–77	0–85	25–65
IL (dB)	4.99	4.5	5.5	7.5
PDL (Polarization dependence loss) (dB)	0.25	0.29	0.26	0.23
BW at 1 dB (nm)	0.46	0.45	0.38	0.43
BW at 3 dB (nm)	0.63	0.62	0.56	0.59
BW at 20 dB (nm)	1.14	1.12	1.08	1.1
AX (dB)	34.3	34.5	30	32
NX (dB)	45.82	45.9	35	41

	The Normal Module	The Integrated Module
$Δ λ$ (pm)	−9	−8
IL (dB)	4.59	4.99
Ripple (dB)	0.33	0.37
PDL (dB)	0.24	0.25
BW at 0.5 dB (nm)	0.38	0.36
BW at 1 dB (nm)	0.47	0.46
BW at 3 dB (nm)	0.63	0.63
BW at 20 dB (nm)	1.15	1.14
AX (dB)	32.76	34.3
NX (dB)	44.49	45.82
TX (dB)	31.57	32.28
Size (mm)	$120 \times 70 \times 11$	$100 \times 45 \times 8$

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Equations (11)

Applied Optics