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Suppression of the Interference Fading in Phase-Sensitive OTDR With Phase-Shift Transform

An approach of phase-shift transform is proposed and demonstrated to suppress the interference fading in phase sensitive optical time domain reflectometry (Φ-OTDR). The phase-shift transform is executed in the digital domain and the complicated frequency modulation is not required. The operation principle is carefully analyzed and a signal with complementary amplitude can be obtained with this method. Through synthesizing the complementary signals, the false phases can be corrected. Benefiting from the flexibility of this approach, multiple transforms are implemented to make sure that all phases are retrieved accurately. Experimental results show that the intensity fluctuation over 60 dB is reduced to 15 dB, which decreases the standard deviation of differential phase to 0.0224. Besides, 30 dynamic measurements are tested and all distorted phases have been corrected, indicating the high reliability of this method.

Ketersediaan

Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.39 No.1 January 1 2021

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 295 - 302

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

DISTRIBUTED OPTICAL FIBER SENSOR
PHASE-SENSITIVE OPTICAL TIME DOMAIN REFLECTOMETRY
INTERFERENCE FADING SUPPRESSION

Info Detail Spesifik

DOI: 10.1109/JLT.2020.3023699

Pernyataan Tanggungjawab

Haijun He, Lianshan Yan, Heng Qian, Yin Zhou, Xinpu Zhang, Bin Luo, Wei Pan, Xinyu Fan, Zuyuan He

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