Weak-Reflection Fiber Bragg Grating Interrogator

Weak-Reflection Fiber Bragg Grating Interrogator

The weak-reflection fiber Bragg grating (FBG) interrogator is a high-performance interrogation device designed for high-density, long-distance weak-reflection FBG arrays. The product integrates a tunable laser, an SOA pulse modulation module, an EDFA optical amplifier, a high-speed photodetector, and a ZYNQ/MPSoC embedded processing platform. It adopts time-division multiplexing (TDM) and wavelength scanning technology to achieve high-precision wavelength interrogation and real-time monitoring of large-scale FBG arrays. The device supports a maximum measurement distance of 10 km, 25,000 spatial sampling points, and a minimum spatial sampling resolution of 0.2 m, and it offers multi-channel expansion capability. The system can independently perform spectral analysis, wavelength interrogation, and data processing, and directly output measurement data such as wavelength, strain, temperature, and humidity. It is widely used in structural health monitoring, industrial equipment monitoring, distributed optical fiber sensing, and other fields.

Product features：Long-distance and high-density measurement；High-precision interrogation performance；Highly integrated intelligent processing；Multi-channel expansion and flexible networking

Part Number：MP-ZZ-WFBG

Application area：Structural health monitoring in civil engineering | Industrial equipment condition monitoring | Energy and pipeline safety monitoring | Fiber sensing research and system integration

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Coherent Sources/Solid-state laser

Main parameters
General Parameters
Optional Configurations
Downloads

Main parameters

Core parameters

Operating wavelength range Spatial resolution

1528–1568 nm 0.2 / 0.4 / 0.8 / 1 m

Dimension Drawing

General Parameters

Technical Parameter	Specification
Wavelength scanning range	1528～1568 nm
Wavelength scanning bandwidth	40 nm
Applicable grating reflectivity	0.001%～0.1%
Applicable grating bandwidth	0.1～0.3 nm
Optical fiber interface type	FC/APC
Strain resolution	≤1 με
Temperature resolution	≤0.1 ℃
Spatial resolution	0.2 / 0.4 / 0.8 / 1 m
Minimum grating spacing	0.1 m
Maximum measurement distance	10 km
Number of spatial sampling points	25,000 points
Measurement frequency	Second-level (on the order of seconds)
Standard number of channels	4 channels
Expansion channels	8/16 channels (optional)
Data processing functions	ZYNQ / MPSoC
processing architecture	FPGA + ARM
Data processing functions	Spectral analysis, wavelength interrogation, sensing data processing
Measurement output	Wavelength, spectrum, strain, temperature, humidity
Data output interface	Gigabit Ethernet
Communication protocol	Modbus TCP
Networking modes	Direct connection, switch networking, router IP networking, wireless networking
Host computer platform	Windows
Software functions	Spectrum display, channel configuration, data storage, data forwarding, sensor parameter configuration
Power supply voltage	DC 12 V
Rated power consumption	20 W
Operating temperature	-10～50 ℃
Dimensions (L × W × H)	485 × 454 × 44 mm
Device weight	7 kg
Installation method	Rack-mounted

Interrogation Performance Demonstration

Full-spectrum interrogation over an interval

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Single-spectrum interrogation over an interval

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Weak grating wavelength interrogation (single wavelength, 2 m spacing)

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Optional Configurations

Downloads

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Product title: Weak-Reflection Fiber Bragg Grating Interrogator

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