Phase-coded Brillouin optical correlation domain analysis with 2-mm resolution based on phase-shift keying

Dexin Ba; Yue Li; Jialiang Yan; Xiaopei Zhang; Yongkang Dong

doi:10.1364/OE.27.036197

Phase-coded Brillouin optical correlation domain analysis with 2-mm resolution based on phase-shift keying

Dexin Ba, Yue Li, Jialiang Yan, Xiaopei Zhang, Yongkang Dong

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

We report a phase-coded Brillouin optical correlation-domain analysis (BOCDA) based on phase-shift keying (PSK), in which the pseudo-random binary sequence (PRBS) phase coding is realized using a Mach-Zehnder modulator (MZM). Unlike the conventional phase-coded BOCDA using a phase modulator, which suffers from the non-rectangular transition in the encoded phase, the PSK can realize perfect phase switches between 0 and π with zero-width edges. It is not sensitive to the bandwidth of the modulator and the power of the radio-frequency modulation signal. Numerical simulations and experimental results prove that it can effectively suppress the Brillouin amplification in the off-peak positions. In experiment, a 2-mm spatial resolution sensing is realized using only a 20-GHz bandwidth MZM.

Original language	English
Pages (from-to)	36197-36205
Number of pages	9
Journal	Optics Express
Volume	27
Issue number	25
DOIs	https://doi.org/10.1364/OE.27.036197
State	Published - 9 Dec 2019
Externally published	Yes

Bibliographical note

Funding Information:
National Natural Science Foundation of China (61975045, 61605034, 61575052); China Postdoctoral Science Foundation (2016M591531); National Key Scientific Instrument and Equipment Development Projects of China (2017YFF0108700).

Publisher Copyright:
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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abstract = "We report a phase-coded Brillouin optical correlation-domain analysis (BOCDA) based on phase-shift keying (PSK), in which the pseudo-random binary sequence (PRBS) phase coding is realized using a Mach-Zehnder modulator (MZM). Unlike the conventional phase-coded BOCDA using a phase modulator, which suffers from the non-rectangular transition in the encoded phase, the PSK can realize perfect phase switches between 0 and π with zero-width edges. It is not sensitive to the bandwidth of the modulator and the power of the radio-frequency modulation signal. Numerical simulations and experimental results prove that it can effectively suppress the Brillouin amplification in the off-peak positions. In experiment, a 2-mm spatial resolution sensing is realized using only a 20-GHz bandwidth MZM.",

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Phase-coded Brillouin optical correlation domain analysis with 2-mm resolution based on phase-shift keying

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