Design of High-Precision Parallel AWG Demodulation System

Here, we present a high-precision demodulation method that supports the arrayed waveguide grating (AWG) system, which includes a 1 × 8 AWG as the primary filter with a 0.5 nm channel spacing and a 1 × 4 AWG as the auxiliary filter with a 1 nm channel spacing. The high precision is achieved through a...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-08, Vol.14 (9), p.1662
Main Authors: Jiao, Yunjing, Lin, Qijing, Yao, Kun, Zhao, Na, Xian, Dan, Zhang, Fuzheng, Meng, Qingzhi, Tian, Bian, Jiang, Zhuangde
Format: Article
Language:English
Subjects:
Accuracy
arrayed waveguide grating
Bandwidths
Channels
Crosstalk
Decoupling method
Demodulation
Demodulation (Electronics)
Design
Design and construction
Insertion loss
integrated optics
Interrogation
stagger peak decouple
Waveguides
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Summary:Here, we present a high-precision demodulation method that supports the arrayed waveguide grating (AWG) system, which includes a 1 × 8 AWG as the primary filter with a 0.5 nm channel spacing and a 1 × 4 AWG as the auxiliary filter with a 1 nm channel spacing. The high precision is achieved through an innovative method of decoupling three channels, involving two adjacent channels of the primary filter and one channel of the secondary auxiliary filter. Simulation results show that the AWGs have a good transmission spectrum with crosstalk below −24.8 dB, non-uniformities below 0.8 dB, insertion loss below −3.7 dB, 3 dB bandwidth of 0.25 nm, and 10 dB bandwidth of 0.43 nm. The interrogation precision can reach 8 pm, with a dynamic range of 0.4 nm, corresponding to a single FBG.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14091662