Fig. 1. Schematic diagram of the structure of the spectrum analysis chip

Fig. 2. Primary AWG function and spectrum schematic

Fig. 3. Schematic diagram of AWG₁ function and spectrum

Fig. 4. Schematic diagram of the spectral relationship between Primary AWG CH₁ and AWG₁

Fig. 5. The cross-sectional view of the strip waveguide and the mode field diagram of the TE fundamental mode

Fig. 6. AWG simulation structure diagram

Fig. 7. The first-stage AWG transmission spectrum and its enlarged view in the range of 1 548.5~1 551.5 nm

Fig. 8. AWG₄ transmission spectrum

Fig. 9. Spectroscopic analysis chip transmission spectroscopy

Fig. 10. The relationship between the FSR_P of the Primary AWG and m

Fig. 11. Schematic diagram of the cause analysis of the large channel insertion loss and crosstalk in the edge part