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OFDR-KL9600 Demodulator
OFDR-KL9600 Demodulator
Product Details
Optical Frequency Domain Reflectometry (OFDR) is a high-precision distributed fiber sensing technology based on the principle of frequency-domain interferometry, enabling sub-millimeter-level localization and quantitative sensing of minute strain and temperature variations along an optical fiber. The OFDR-KL9600 Distributed Fiber Sensing System, independently developed by Shanghai Kunlian Technology, employs a narrow linewidth, highly stable frequency-swept laser source. Combined with a high dynamic range interferometric receiver link and an adaptive Rayleigh scattering spectrum tracking algorithm, it significantly enhances the system's signal-to-noise ratio and measurement stability while maintaining extremely high spatial resolution.
In contrast to the pulsed ranging mechanism of traditional OTDR-based systems, OFDR utilizes a frequency-modulated laser to generate phase encoding across the scanning range. It performs Fourier inversion of the spectral structure of the interference signal in the frequency domain to obtain a Rayleigh scattering reflection profile along the fiber length. This profile serves as a unique "fingerprint" for each microscopic segment of the fiber. External minute perturbations (e.g., thermal expansion, structural strain) induce relative shifts in the scattering spectrum, which can be reconstructed in real-time through high-precision phase difference analysis.
Regarding core hardware design, the system integrates a high-linear tuning control module, a low-noise photodetector, a high-speed sampling AD conversion chain, and employs an FPGA+DSP multi-level co-processing architecture for real-time spectral reconstruction and dynamic filtering, effectively mitigating environmental disturbances and system drift. Its measurement accuracy, stability, and long-term repeatability have reached internationally advanced levels.
The OFDR-KL9600 Distributed Fiber Sensing System can be deployed on standard telecommunication single-mode fibers, requiring no dedicated sensing cables or nodes. It offers exceptional system integration flexibility and long-term operational reliability, making it an ideal solution for high-resolution structural health monitoring, research on material micro-properties, and precision engineering applications.
Core Features
✅ Ultra-high Spatial Resolution
Resolution up to 10 μm ~ 1 mm, far exceeding traditional distributed fiber sensing systems.
✅ High-Sensitivity Strain Detection
Minimum strain resolution down to 1 με, suitable for micro-stress variation monitoring.
✅ High-Stability Measurement System
Built-in temperature control and reference channel design effectively suppress drift and noise.
✅ Non-contact, Fully Distributed Sensing
Supports simultaneous multi-point/segment analysis, eliminating the need for multiple discrete sensors.
✅ Graphical Analysis Platform
Included PC software supports strain/temperature distribution maps, time-series comparison charts, and 3D heatmap visualization.
| Parameter | Value | |||
|---|---|---|---|---|
| Measurement Type | Strain / Temperature | |||
| Spatial Resolution | ≤ 1 mm | |||
| Measurement Range | ≥ 20 m (Extendable) | |||
| Strain Resolution | ≤ 1 με | |||
| Temperature Resolution | ≤ 0.1 °C | |||
| Laser Type | Tunable Narrow Linewidth Laser | |||
| Output Interface | USB / LAN / Optical Port | |||
| Software Platform | Supports Windows GUI / SDK Interface | |||
| Note: All models support continuously adjustable output power and are equipped with electronic control systems. | ||||
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