基于受激布里渊散射的高精度多微波频率测量

doi:10.12305/j.issn.1001-506X.2022.11.01

Abstract

Abstract:

A high resolution multiple microwave frequency measurement scheme based on stimulated Brillouin scattering is proposed. The unknown microwave signal and sweep microwave signal are carrier suppressed single sideband modulated via dual parallel Mach-Zehnder modulators (DPMZM) which are set as the signal light and pump light of the dispersion shift single-mode fiber. With the phase matching between the signal wave and the pump wave, the stimulated Brillouin scattering will be stimulated and the low frequency signal optical will be amplified. Then, the unknown signal can be estimated by measuring the signal power of the output signal. Then, the dual stage Brillouin system is utilized in the scheme to reduce the Brillouin gain spectrum linewidth. Besides, by adjusting some parameters of the DPMZM, the high frequency measurement can be realized with a relatively low-frequency sweep signal which can reduce the system complexity. Furthermore, the optical power values of the output are utilized to generate an amplitude comparison function which can provide a frequency estimation error to power mapping. Then, the estimation accuracy can be further improved via error correction. The proposed scheme is verified by numerical simulations which demonstrate that the measurement error is less than ±3 MHz.

Key words: microwave photonics, microwave frequency measurement, stimulated Brillouin scattering, carrier suppressed single sideband modulated, amplitude comparison function

CLC Number:

TN98

Xianyu ZHANG, Tao LIANG, Kang AN. High-resolution multiple microwave frequency measurement based on stimulated Brillouin scattering[J]. Systems Engineering and Electronics, 2022, 44(11): 3291-3297.

Figures/Tables 11

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References 30

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High-resolution multiple microwave frequency measurement based on stimulated Brillouin scattering

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