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Proceedings Paper

Characterization of phase-shifted Brillouin dynamic gratings in a polarization maintaining fiber
Author(s): Dengwang Zhou; Yongkang Dong; Pengbai Xu; Lei Teng; Hongying Zhang; Zhiwei Lu
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Paper Abstract

We numerically calculate and experimentally investigate the characterization of phase-shifted Brillouin dynamic gratings (PS-BDGs) in a polarization maintaining fiber (PMF). A phase-shifted point is induced into the middle of a conventional BDG through phase-modulating one of the two pump pulse, generating a PS-BDG thanks to the stimulated Brillouin scattering (SBS). When the frequency difference between a high frequency pump1 pulse with 1ns and π-1ns and a low frequency pump2 pulse with 100ps is equal to the Brillouin frequency shift of the PMF, a transient PS-BDG with a 3dBbandwidth of 354MHz of the notch spectrum is simulated based on the coupled-wave equations of BDG. By increasing the repetition rate up to 250MHz, an enhanced PS-BDG with a deep notch depth is obtained since the residual acoustic wave of the former SBS process is enhanced by the optical waves of the latter SBS process. Then a proof-of-concept experiment is built to verify the transient PS-BDG and the results show that the notch feature is consistent with the simulation results and the notch frequency of the PS-BDG can be changed by tuning the phase shift Δϕ . The proposed PS-BDGs have important potential applications in optical fiber sensing, microwave photonics, all-optical signal processing and RoF (radio-over-fiber) networks.

Paper Details

Date Published: 4 November 2016
PDF: 7 pages
Proc. SPIE 10026, Real-time Photonic Measurements, Data Management, and Processing II, 100260X (4 November 2016); doi: 10.1117/12.2247000
Show Author Affiliations
Dengwang Zhou, Harbin Institute of Technology (China)
Yongkang Dong, Harbin Institute of Technology (China)
Pengbai Xu, Harbin Institute of Technology (China)
Lei Teng, Harbin Institute of Technology (China)
Hongying Zhang, Harbin Univ. of Science and Technology (China)
Zhiwei Lu, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 10026:
Real-time Photonic Measurements, Data Management, and Processing II
Ming Li; Bahram Jalali; Keisuke Goda; Kevin K. Tsia, Editor(s)

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