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Fiber Bragg Grating Sensor
Introduction
FBG (Fiber Bragg Grating) technology is making a significant impact on how we measure things optically. It provides accurate and repeatable readings in a lot of different fields and industries. FBG sensors use a single mode fiber that has been altered to create a distributed bragg reflector that reflects and transmits certain wavelengths when hit with light from an unfiltered light source. Due to the Wavelength Selective response of the sensor, it will automatically give you an accurate reading of how much change due to a range of different measured features including temperature, strain, vibration, and pressure. Tempsens Instruments has been a pioneer in the field of FBG sensing systems, combining state-of-the-art technology with the requisite engineering durability, to provide customers with superior solutions for very rugged applications where traditional sensor solutions will not operate. The unique property of these sensors with no susceptibility to electromagnetic interference and their ability to be multiplexed allow them to be used for critical application monitoring in a wide variety of industries including Aerospace and Civil Infrastructure.
About Fiber Bragg Grating Sensor
Fiber Bragg Grating Sensors Principle
The principle behind how FBG-type sensors work is based on the interaction of light and matter through the fiber core. If the grating structure of the sensor is affected by mechanical strain or temperature changes, then the periodic spacing between the gratings will alter, resulting in a measurable shift in the reflected Bragg wavelength. This shift can be calibrated against temperature or mechanical strain, thus allowing the accurate measurement of these physical properties. Since the FBGs can be constructed along the entire length of the fiber, then a great number of sensors (multiple gratings) may be accommodated on one single optical fiber system and configured for multipoint sensing.
Fiber Bragg Grating Specifications
| Parameter | Specification |
| Temperature Measurement Range | -20°C to 250°C / -20°C to 450°C / -20°C to 900°C |
| Temperature Accuracy | ±1°C |
| Temperature Resolution | 0.1°C |
| Number of Channels | 1 / 2 / 4 / 8 / 16 |
| No. of FBG per Channel | 1 (Min), 20 (Max) |
| Response Frequency | 1 Second per channel |
| Communication Interface | RS-485, Ethernet (RJ-45) |
| Power Supply | 100–230 V AC, 50–60 Hz |
| Operating Temperature | 0°C to 50°C |
| Storage Temperature | -20°C to 70°C |
Fiber Bragg Grating Features
- Multiplexing capability : Multiple gratings can be written on a single optical fiber and multiple sensors can be attached from a daisy chain.
- Low loss relative to the fiber length
- Immunity to electromagnetic and radio frequency interference
- Small size and Weight
- Intrinsically safe operation in hazardous environment
- High sensitivity and long-term reliability
- Wide Temperature
Applications of Fiber Bragg Gratings
- Power Transmission and Distribution
- Hydro Power Plant Monitoring.
- Petrol and gas exploration.
- Structural Health Monitoring.
- Tunnels and Pipelines monitoring.
- Commercial Transportation.
- Aerospace industries.
- Medical Industry
Why Tempsens for Fiber Bragg Grating Sensor?
- Decades of hands-on expertise delivering reliable thermal solutions.
- Full manufacturing control, from raw material to finished product, backed by state-of-the-art facilities.
- Dedicated technical support team providing assistance throughout the entire purchase and commissioning process.
- Worldwide service network providing timely post-sale product support and maintenance of your systems.
For More Information you can refer to our blog:- Fiber Bragg Grating Based Sensors.
FAQ
Frequently Asked Questions
Find answers to frequently asked questions related to Fiber Bragg Grating Sensor.
The Fiber Bragg Grating (FBG) provides accurate readings of temperature, strain (both dynamic and static), vibration, pressure, and acceleration over a wide range (-20°C – 900°C). The unique characteristic of the FBG sensor is its ability to function as a multi-parametric monitoring device from a single fiber optic network by measuring the wavelength shift.
The Bragg wavelength is the light wavelength specifically reflected back from the fiber grating. A change in temperature or strain leads to a proportional shift of the Bragg wavelength, so it forms the basis for measurement.
FBG sensors have an accuracy of ±1.0°C. They provide approximately ±2 µε of strain accuracy. Fiber optic cables have high signal-to-noise ratio and can detect even the slightest variations in ambient conditions with high levels of sensitivity.
The Fiber Bragg Grating Sensor has a price point based on its channel configuration, amount of sensing points supported, temperature range and cable length. Tempsens have a competitive price offering that ranges from cost-effective single-point solutions up to full multi-channel networks designed for maximum value for all types of monitoring needs.
