Compact and Low Loss Coarse Wavelength Division Demultiplexer Chip

Fig. 4. Structure of intersection angle and MFD received by detector versus W and D. (a) Diagram of demultiplexing chip 45° angle and detector coupling structure; (b) MFD versus Wwhen D=20 μm; (c) MFD versus D when W=10 μm

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Fig. 5. Output power versus upper coating layer thickness D

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Fig. 6. Flow chart of design

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Fig. 7. CWDM AWG chip layout

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Fig. 8. Physical map of chip

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Fig. 9. Spectra of CWDM AWG chip

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Table 1. Performance and size of CWDM AWG chip
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Table 1. Performance and size of CWDM AWG chip
Parameter Value
Channel number 4
λ₀ /nm 1301
Channel spacing /nm 20
n_c 1.462070
n_s 1.465769
n_g 1.487427
Δx_i /μm 15
Δx_o /μm 15
d /μm 10
m 10
ΔL /μm 8.898
R /μm 1080.59
N 51
Chip size /(mm×mm) 9.5×1.8

Table 2. Comparison of CWDM AWG chips

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Table 2. Comparison of CWDM AWG chips

Parameter	Wooriro	PPI	Thispaper
Peak insertion loss /dB	<2.5	<2	<1.07
1 dB bandwidth /nm	>12	>13	>13.7
3 dB bandwidth /nm	>15	>14	>16.1
Wavelength accuracy deviation /nm	<1	<1.5	<0.28
Polarization-dependent loss /dB		<0.5	<0.08
Adjacent crosstalk /dB	>20		>24
Non-adjacent crosstalk /dB	>24	>25	>30

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Liangliang Wang, Jiashun Zhang, Junming An, Shaoyang Li, Yanzhang Hu, Xiasen Chang. Compact and Low Loss Coarse Wavelength Division Demultiplexer Chip[J]. Acta Optica Sinica, 2021, 41(9): 0923001

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