Ultrafast Resolution-Enhanced Digital Optical Frequency Comb-Based BOTDA with Pump Pulse Array Coding

Yichang Wu, Chengkun Yang, Jingshun Pan, Qi Sui, Dawei Wang
2020 Sensors  
In this letter, a resolution enhancement and signal-to-noise ratio (SNR) improvement scheme for digital optical frequency comb (DOFC)-based Brillouin optical time-domain analysis (BOTDA) ultrafast distributed sensing employing a pump pulse array is proposed. Based on the properties of the time-invariant linear system and the cyclic revolution theorem, experimental results indicate that its spatial resolution reaches 10.24 m while the frequency uncertainty is below 2 MHz over a 9.5 km fiber.
more » ... over, the response time is only 209.6 μs and the temperature measurement error is less than 0.52 °C.
doi:10.3390/s20226411 pmid:33182619 fatcat:3ravrfiuvbcfvo6pwuovtezo7y