High-Spatial-Resolution OFDR Distributed Temperature Sensor Based on Step-by-Step and Image Wavelet Denoising Methods
Cailing Fu, Pengfei Li, Ronglong Sui, Zhenwei Peng, Huajian Zhong, Xiaoyu Yin, Yiping Wang
Abstract
A high-spatial-resolution OFDR distributed temperature sensor based on Au-SMF was experimentally demonstrated by using step-by-step and image wavelet denoising methods (IWDM). The measured temperature between 50 and 600 °C could be successfully demodulated by using SM-IWDM at a spatial resolution of 3.2 mm. The temperature sensitivity coefficient of the Au-SMF was 3.18 GHz/°C. The accuracy of the demodulated temperature was approximately 0.24 °C. Such a method has great potential to expand the temperature measurement range, which is very useful for high-temperature applications.
Topics & Concepts
Image resolutionWaveletAtmospheric temperature rangeTemperature measurementNoise reductionWavelet transformMaterials scienceResolution (logic)Sensitivity (control systems)OpticsRemote sensingArtificial intelligenceComputer sciencePhysicsElectronic engineeringGeologyEngineeringQuantum mechanicsMeteorologyAdvanced Fiber Optic SensorsAnalytical Chemistry and SensorsPhotonic and Optical Devices