| Title |
Linear Interrogation of Distributed Fiber Grating Temperature Sensor Network using a Fabry-Perot ITU Filter |
| Authors |
Hyung-Joon Park ; Min-Ho Song |
| Keywords |
Fiber-optic temperature sensor ; Fiber Bragg grating ; Fabry-Perot filter |
| Abstract |
We constructed a fiber-optic temperature sensor system using a sensor array with 15 fiber Bragg gratings for distributed temperature monitoring in electrical power systems. A polynomial fitting algorithm was used to compensate the nonlinear action of the MEMS tuneable wavelength filter used for Bragg wavelength demodulation Fixed passband wavelengths from a Fabry-Perot ITU filter were used as reference wavelengths for the fitting algorithm, which obtained constant accuracy regardless of the wavelength scanning range and frequency. About 0.18[%] of linearity error compared to reference thermocouple thermometer has been obtained in the preliminary experimental results. |