Derived Sequences Decoding Approach for Long-Range Distributed Temperature Sensors

被引：3

作者：

Chai, Dongdong ^{[1
]}

Zhang, Hongjuan ^{[1
]}

Gao, Yan ^{[1
]}

Jin, Baoquan ^{[2
]}

机构：

[1] Taiyuan Univ Technol, Coll Elect & Power Engn, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Technol, Coll Phys & Optoelect, Key Lab Adv Transducers & Intelligent Control Syst, Minist Educ & Shanxi Prov, Taiyuan 030024, Peoples R China

来源：

IEEE SENSORS JOURNAL | 2023年 / 23卷 / 03期

关键词：

Codes; Decoding; Temperature sensors; Optical fiber sensors; Optical fiber amplifiers; Encoding; Sensors; Derived sequences; distributed temperature sensors; Raman scattering; transient effect;

D O I：

10.1109/JSEN.2022.3229417

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel derived sequences decoding approach is proposed to solve the transient effect in the process of amplifying Golay codes pulse sequences by Erbium-doped fiber amplifier (EDFA) in long-range Raman distributed temperature sensors (RDTS). The derived sequences that maintain good cross-correlation with the attenuated sequences are used to decode without distortion to the greatest extent. Without adding the hardware equipment of the RDTS system, the attenuation of Golay codes is compensated in the process of decoding. The sidelobes of the time-domain correlation results can be reduced to less than 1% of the peak height. In addition, the return-to-zero (RZ) Golay codes output by the distributed feedback (DFB) laser is transmitted to the fiber to improve the signal-to-noise ratio (SNR). Finally, the maximum temperature resolution of +/- 2.5 degrees C is achieved at a 45 km-long single-mode fiber (SMF) when the spatial resolution (SR) is 5 m.

引用

页码：2204 / 2210

页数：7

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