Low-crosstalk silicon photonics arrayed waveguide grating

Zhiqun Zhang; Juan Hu; Hua Chen; Fangjiang Li; Lei Zhao; Jinbin Gui; Qing Fang

doi:10.3788/COL201715.041301

Journals >Chinese Optics Letters >Volume 15 >Issue 4 >Page 041301 > Article

Chinese Optics Letters
Vol. 15, Issue 4, 041301 (2017)

Low-crosstalk silicon photonics arrayed waveguide grating

Zhiqun Zhang^1、2, Juan Hu², Hua Chen², Fangjiang Li², Lei Zhao², Jinbin Gui², and Qing Fang^2、*

Author Affiliations

¹Department of Library, Kunming University of Science and Technology, Kunming 650500, China

²College of Science, Kunming University of Science and Technology, Kunming 650500, China

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DOI: 10.3788/COL201715.041301 Cite this Article Set citation alerts

Zhiqun Zhang, Juan Hu, Hua Chen, Fangjiang Li, Lei Zhao, Jinbin Gui, Qing Fang. Low-crosstalk silicon photonics arrayed waveguide grating[J]. Chinese Optics Letters, 2017, 15(4): 041301 Copy Citation Text

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Fig. 1. Schematic of 1×4 cascaded silicon photonics AWG.

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Fig. 2. SEM images of 1×4 cascaded silicon photonics AWG.

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Fig. 3. TEM image of one arrayed waveguide.

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Fig. 4. Optical microscope image of 1×4 cascaded arrayed waveguides.

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Fig. 5. Spectrum of the single AWG (TE).

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Fig. 6. Spectrum of 1×4 cascaded arrayed waveguides (TE).

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Silicon waveguide total height	220 nm
Silicon rib waveguide height	120 nm
Min. pitch of input/output waveguides	2.5 μm
Min. pitch of arrayed waveguides	2.5 μm
Width of arrayed waveguides	600 nm
Channel spacing	6.4 nm
Grating order	28
FPR	82.9 μm
FSR	44.1 nm
Number of arrayed waveguide	20
Min. radius of arrayed waveguides	30 μm
Length difference of arrayed waveguides	13.95 μm
Operation wavelength	1.55 μm

Table 1. Design Parameters of a Single AWG

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	Single AWG	Cascaded AWG
Insertion loss (including coupling loss of 3.6 dB)	5.6 dB	7.6 dB
Loss non-uniformity	0.2 dB	0.4 dB
Crosstalk	12.5 dB	33.2 dB
1st channel wavelength ( $λ_{1}$ )	1569.2 nm	1570.2 nm
2nd channel wavelength ( $λ_{2}$ )	1575.6 nm	1576.6 nm
3rd channel wavelength ( $λ_{3}$ )	1581.9 nm	1582.9 nm
4th channel wavelength ( $λ_{4}$ )	1588.2 nm	1589.3 nm
Channel spacing	$6.4 \pm 0.1 nm$	$6.4 \pm 0.1 nm$
FSR	44.5 nm	44.5 nm
Average 3-dB bandwidth	3.0 nm	1.9 nm

Table 2. Results of Single AWG and 1×4 Cascaded AWGs

Zhiqun Zhang, Juan Hu, Hua Chen, Fangjiang Li, Lei Zhao, Jinbin Gui, Qing Fang. Low-crosstalk silicon photonics arrayed waveguide grating[J]. Chinese Optics Letters, 2017, 15(4): 041301

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