Microwave Photonic Temperature Sensing Based on Fourier Domain Mode-Locked OEO and Temperature-to-Time Mapping

• DOI: 10.1109/jlt.2022.3174697
• Publication Date: 2022-05-12T19:34:15Z
• Authors: Lu Wang; Tengfei Hao; Guangyi Li; Ming Li; Ninghua Zhu; Wei Li
• Keywords: Wideband

We report a novel temperature sensor based on Fourier domain mode-locked optoelectronic oscillator (FDML OEO) and temperature-to-time mapping. In the proposed scheme, narrow bandpass electrical filter is inserted into FDML OEO cavity. The information mapped to time interval of output pulses due temperature-sensitive bidirectional scanning property OEO. Compared with other OEO-based sensors, scheme avoids needs wideband spectrum analyzers, since can be interrogated using low-speed oscilloscope working under sub-Nyquist sampling condition. proof-of-concept experiment, high sensitivity 8.166 μs/°C resolution 0.03°C achieved, demonstrating good sensing performance.