Bid Farewell to Traditional Pain Points: How HRL-S Sensing Fiber Enables More Accurate and Stable Distributed Monitoring?

By precisely optimizing the optical parameters of the fiber core, the HRL-S sensing fiber continuously enhances the Rayleigh scattering intensity in the fiber, improving the stability and measurement range of distributed optical fiber sensing. This fundamentally addresses the pain points of traditional fibers in Rayleigh scattering sensing.

Figure 1 shows the Rayleigh scattering signal curve of the HRL-S sensing fiber. The signal of the test fiber (between the red frames) is approximately 1.88 dB higher than that of ordinary fibers.

[Note: Technical parameters and graph labels in the original image are retained as follows for consistency: OCI-Ultra High Precision Distributed Optical Coherent Interrogator Operate Extension Module Help File; Scan Range (m); Center Wavelength (nm): 1550; Gain: x10; Decimation: 100; Window Range (km): 0.0100; Raw Data; RL (dB); DL (dB); Upper data 0; Lower data 0]

The HRL-S sensing fiber features strong compatibility and can be fabricated into commonly used connectors (such as FC, LC, SC). The splicing or connection loss between the HRL core and G652D series fibers is only about 0.5 dB, enabling seamless adaptation to OFDR equipment without the need to modify existing monitoring systems.

The fiber coating is made of modified acrylate material, which solves the failure problem of traditional fibers in ultra-low temperature testing. Combined with low-temperature glue, it can achieve strain measurement at -200°C, meeting the distributed sensing needs of special scenarios such as ultra-low temperature storage tank monitoring, polar engineering structure detection, and low-temperature laboratory equipment monitoring. This breaks the bottleneck of traditional sensing fibers with limited performance in extreme low-temperature environments.

The HRL-S sensing fiber excels in strain transmission efficiency, on par with polyimide fibers, and can accurately and efficiently transmit strain and temperature changes, providing core support for high-precision measurements.

Adopting modified acrylate coating material, the fiber has higher hardness than traditional acrylate coatings, enabling a strain transmission efficiency of over 99%. This feature completely addresses the industry pain point of poor strain transmission at the edge positions of traditional distributed fibers, achieving excellent strain transmission without stripping the coating. Whether used for surface strain monitoring of large structural components such as bridges and buildings, or for deformation tracking of pipelines and pressure vessels, it ensures the accuracy of strain data collected at all positions of the fiber.

[Figure 2: Sensing Curve Diagram – HRL-S Sensing Fiber vs. Bare Fiber vs. Acrylate Fiber; Horizontal axis: Length (m); Vertical axis: Strain (με)]

In addition, compared with commonly used polyimide fibers, the HRL-S sensing fiber has an advantage in operational convenience. Due to material characteristics, polyimide coatings require high-temperature heating or special stripping tools for removal, which are not available in many scenarios. In contrast, the HRL-S sensing fiber only requires ordinary fiber strippers to quickly complete coating removal, greatly simplifying pre-test preparation procedures. This provides significant convenience for on-site testing, emergency monitoring, and other scenarios, effectively improving experimental efficiency.

In summary, the HRL-S Rayleigh Scattering Enhanced Sensing Fiber effectively addresses the pain points of traditional fibers with its three core advantages of high signal, high compatibility, and high transmission efficiency. It adapts to various equipment and extreme environments, improves monitoring efficiency and accuracy, and provides reliable support for distributed sensing applications across industries.