A receiving module and Brillouin optical time domain analyzer

By designing a receiving module in the Brillouin optical time domain analyzer, monitoring the optical signal in real time and adjusting the working wavelength of the light source, the reliability and stability problems caused by inconsistent working wavelengths of the light source and the fiber filter center are solved, and higher analyzer reliability and adaptability are achieved.

CN113063451BActive Publication Date: 2025-04-01ZTE CORP
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Patent Information

Application Number
CN201911296665.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-12-16
Publication Date
2025-04-01
Estimated Expiration
2039-12-16

AI Technical Summary

Technical Problem

The existing Brillouin optical time domain analyzers are inconsistent when the center working wavelengths of the light source and the fiber filter are inconsistent, resulting in a decrease in the power of the optical signal, and the reliability and stability of the instrument are reduced, especially when the high and low temperature changes, the analyzer is prone to failure.

Method used

A receiving module is designed, including a combination of coherent receivers, filters and analog-to-digital converters. By connecting with the acousto-optical modulator, fiber optic filter and digital signal processing module in the Brillouin optical time domain analyzer, the optical signal is monitored in real time and the working wavelength of the light source is adjusted to maintain consistency with the operating wavelength of the fiber optic filter.

Benefits of technology

It improves the reliability and stability of the Brillouin optical time domain analyzer, enhances the adaptability to high and low temperature changes, and avoids the analyzer failure caused by the decrease in optical signal power.

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Abstract

The present application provides a receiving module and a Brillouin optical time domain analyzer. The receiving module includes: a coherent receiver and at least one filter and analog-to-digital converter combination, the coherent receiver is respectively connected to the acousto-optic modulator, the optical fiber filter and at least one filter and analog-to-digital converter combination in the Brillouin optical time domain analyzer, and the at least one filter and analog-to-digital converter combination is also connected to the digital signal processing module in the Brillouin optical time domain analyzer; the coherent receiver is used to beat the optical signal generated by the acousto-optic modulator with the optical signal filtered by the optical fiber filter and convert it into an analog signal of a target frequency band, and the at least one filter and analog-to-digital converter combination is used to filter the analog signal with a set frequency band and convert it into a digital signal, and output it to the digital signal processing module, so that the digital signal processing module adjusts the working wavelength of the light source in the Brillouin optical time domain analyzer according to the output value of the at least one filter and analog-to-digital converter combination.
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