Flexible signal demodulation to polymer microring sensor system based on chirped fiber gratings and adjustable edge filters

Polymer microring resonator fabricated by nanoimprint technique is pushing forward its application in sensing system, a novel demodulation method based on chirped fiber gratings and long period gratings is presented. For linear edge filtering, the wavelength dip of the long period grating can be adjusted to match the range of sensing. The demodulation with high resolution of 31pm and stable wavelength shift of each channel with bandwidth of 2.4nm is achieved. The system is designed in all-fiber device and connection. It can work on quasi static mode or dynamic mode.