Study on ultra-high-resolution active fiber-optic sensors for the measurement of the Earth

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In this project, a novel multiplexed active fiber-optic strain sensor based on ultra-nano-linewidth DBR fiber laser has been proposed, and strain sensing with ultra-high strain resolution down to nano-strain at 1-100Hz low-frequency region has been demonstrated. This technique can be expected to provide crustal deformation monitoring solutions that can be built and maintained at multiple locations at reasonable cost for Earth measurement, especially for earthquake studies. Related to the achievements of this project, 4 peer-reviewed journal papers and 19 international and domestic conference papers have been published.