A　fiber　Bragg　grating　(FBG)　demodulation　system　based　on　arrayed　waveguide　gratings　(AWGs)　is　proposed.　We　designed　the　key　parameters　of　the　AWG,　prepared　the　AWG　chip　based　on　a　silica-on-silicon　planar　light　wave　circuit　(PLC)　platform,　and　integrated　the　AWG　with　a　PD　array.　Eight　AWG　output　channels　were　selected　and　the　output　signals　from　the　photodiode　(PD)　array　was　connected　to　the　board　with　gold　wire　bonding.　The　demodulation　circuitry　consists　of　transimpedance　amplifiers　(TIAs),　analog-to-digital　converters　(ADCs),　and　a　main　control　chip.　The　signal　from　the　PDs　are　synchronously　captured　and　amplified　and　then　transmitted　at　high　speed　through　an　Ethernet　interface.　The　total　volume　of　the　demodulation　system　is　200　×　100　×　60　mm3.　Experiments　show　that　the　wavelength　demodulation　accuracy　of　the　system　is　4.24　pm,　the　demodulation　rate　is　more　than　200　kHz,　and　the　average　error　of　the　demodulation　acceleration　is　better　than　22.8　mg.　The　proposed　demodulation　system　can　be　applied　in　the　field　of　high-frequency　vibration　sensing　of　FBGs.　©　2024　Optica　Publishing　Group.　All　rights,　including　for　text　and　data　mining　(TDM),　Artificial　Intelligence　(AI)　training,　and　similar　technologies,　are　reserved.