Design of High-Precision Parallel AWG Demodulation System.
Micromachines (Basel)
; 14(9)2023 Aug 25.
Article
en En
| MEDLINE
| ID: mdl-37763825
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.
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MEDLINE
Idioma:
En
Revista:
Micromachines (Basel)
Año:
2023
Tipo del documento:
Article
País de afiliación:
China