A Long-range Fiber-optic Raman Distributed Temperature Sensor Based on Dual-source Scheme and RZ Simplex Coding

We proposed a novel cost-effective Raman distributed temperature sensor (RDTS), where two directly modulated distributed feedback (DFB) laser diodes were employed to mitigate transient effect when pulse sequences are amplified by Erbium doped fiber amplifier (EDFA). Moreover, return-to-zero (RZ) Sim...

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Vydáno v:2018 Asia Communications and Photonics Conference (ACP) s. 1 - 3
Hlavní autoři: Dai, Gaoyu, Fan, Xinyu, He, Zuyuan
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.10.2018
Témata:
erbium doped fiber amplifier
Erbium-doped fiber amplifiers
fiber optic sensors
Optical fiber amplifiers
Optical fiber sensors
Raman scattering
Temperature measurement
temperature measurements
Temperature sensors
Transient analysis
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Shrnutí:We proposed a novel cost-effective Raman distributed temperature sensor (RDTS), where two directly modulated distributed feedback (DFB) laser diodes were employed to mitigate transient effect when pulse sequences are amplified by Erbium doped fiber amplifier (EDFA). Moreover, return-to-zero (RZ) Simplex codes and complementary RZ Simplex codes were modulated on the two DFB lasers so as to improve signal-to-noise ratio (SNR) and temperature resolution. Without using any modulators, a spatial resolution of 10 m over 56-km optical fiber, and a temperature resolution of 1.8 °C at the positon of 50 km were demonstrated by using the proposed technique.
DOI:10.1109/ACP.2018.8596150