Product Overview

The DAS-U250 Ultimate Edition Distributed Fiber Acoustic Sensing System (DAS) integrates years of independent R&D achievements, achieving comprehensive upgrades in system architecture, signal processing, algorithm optimization, and anti-interference capability. The system employs an ultra-coherent narrow-linewidth laser source paired with a high-speed, high-precision acquisition platform, alongside proprietary fiber demodulation algorithms and an FPGA hardware acceleration platform. It is specifically engineered to meet the most demanding requirements for spatial resolution, sensitivity, and stability in extreme environments.

One of its core highlights is the breakthrough technology for coherent fading and polarization fading noise suppression. Traditional DAS systems are susceptible to coherence fluctuations and polarization state disturbances in complex environments, leading to decreased signal-to-noise ratio and increased false detection rates. By utilizing multi-channel phase fusion, adaptive polarization control, and dynamic time-window filtering techniques, this system significantly reduces the impact of interference signals on the main channel. This enables truly stable, high-fidelity acoustic signal restoration, ensuring reliable operation in long-distance, high dynamic range monitoring scenarios.

In terms of spatial precision, the system achieves a spatial resolution better than 5 meters. It can perform high-density point monitoring along optical cable paths spanning tens of kilometers, accurately capturing even the slightest disturbance. The system features a 250 MSPS high sampling rate, 4-channel synchronous acquisition capability, and supports 2-channel 500 MSPS DAC feedback for real-time data generation and simulation response. It is suitable for various application scenarios such as oil and gas pipelines, border protection, high-speed rail tracks, and structural health monitoring.