When the light wavelength permeating the f - p filter equals to the bragg reflection wavelength , there is an interrupt request signal , dsp deals with the useful information after dsp answers interruption , and then obtain the corresponding changes of the measured parameters 當(dāng)透過f - p濾波器的光波長與bragg反射波長重合時,就產(chǎn)生中斷請求信號, dsp響應(yīng)中斷后就對有用的信息進(jìn)行處理,進(jìn)而得到相應(yīng)被測參量的變化。