FBG Sensors
INFIBRA TECHNOLOGIES can offer a range of FBG-based different sensors as well as supplies custom solution starting from single FBGs and arrays of FBGs. A short list of standard solutions is reported below, click on the picture in a selected tab to read the specifications.

Single Fiber Bragg Grating

- Civil engineering
- Transportation
- Chemical Processes
- Power
- Oil&Gas
- Automotive & Aerospace
- Medical & Robotics
- Telecommunications
- Reasearch & Development
FBG specifications:
FBG Wavelength (CWL) | 1.500 ÷ 1.600 nm (other on request) |
FBG Wavelength tolerance (CWLT) | ± 0,5 nm (other on request) |
FBG Bandwidth (FWHM) | 0,1 nm to 1 nm (other on request) |
FBG Reflectivity Peak (R) | Up to 99 % (50% typical) |
Side Lobe Suppression Ratio (SLSR) | > 15dB (other on request) |
FBG Length (L) | 1 ÷ 12 mm (other on request) |
Fiber Type | Standard single-mode, Bend insensitive, Pure core silica, (others on request) |
Fiber coating | Acrylate (up to 80°C), High Temperature Acrylate (up to 150°C), Polyimide (up to 250°C, short term 400°C), Metal coating on request (up to 700°C) |
Fiber pigtail length | 1 m both side (other on request) |
Optical connector | FC/APC (other on request) |
Packaging options | Tubing (e.g. polymeric, stainless steel, PEEK, PTFE), extra buffer ruggedization (other on request) |
Download Datasheet

Single Fiber with Array of Bragg Gratings

- Civil engineering
- Transportation
- Chemical Processes
- Power
- Oil&Gas
- Automotive & Aerospace
- Medical & Robotics
- Telecommunications
- Reasearch & Development
Array of FBGs specifications:
Number of FBGs per array | Up to 50 (higher on request) |
FBGs Spacing | >15 mm (other on request) |
FBG Wavelength (CWL) | 1.500 ÷ 1.600 nm (other on request) |
FBG Wavelength tolerance (CWLT) | ± 0,5 nm (other on request) |
FBG Bandwidth (FWHM) | 0,1 nm to 1 nm (other on request) |
FBG Reflectivity Peak (R) | Up to 99 % (50% typical) |
Side Lobe Suppression Ratio (SLSR) | > 15dB (other on request) |
FBG Length (L) | 1 ÷ 12 mm (other on request) |
Fiber Type | Standard single-mode, Bend insensitive, Pure core silica, (others on request) |
Fiber coating | Acrylate (up to 80°C), High Temperature Acrylate (up to 150°C), Polyimide (up to 250°C, short term 400°C), Metal coating on request (up to 700°C) |
Fiber pigtail length | 1 m both side (other on request) |
Optical connector | FC/APC (other on request) |
Packaging options | Tubing (e.g. polymeric, stainless steel, PEEK, PTFE), extra buffer ruggedization (other on request) |
Download Datasheet

Rugged In-Well High Temperature FBG Sensor

- Machine Condition Monitoring
- Power Plants Transformers
- Chemical Processes
- Conveyor Systems
- High Temperature Environments
Physical specifications:
Sensor Construction | Rigid Loose Tube |
Dimension (φ x L) | Tube diameter and sensor length to suit application |
Package material | Stainless steel AISI 304 or other options |
Fixing method | Swagelok , Glue |
Optical specifications:
Fiber Type | Single-mode SMF-28 9/125 μm |
FBG Wavelength (CWL) | 1.460 ÷ 1.620 nm |
FBG Bandwidth (FWHM) | 0,25 nm (typical) |
FBG Peak Reflectivity (R) | > 50 % |
Side Lobe Suppression Ratio (SLSR) | > 15dB |
Sensors Spacing (D) | >7 mm (Customizable) |
Sensors Number | Custom to suit application |
Measurement Range | -50 to 500 °C (600 °C R&D) |
Sensor Resolution | 0,1 °C (depending on FBG interrogator) |
Sensor Accuracy | 0,5 °C (depending on FBG interrogator) |
Cable Length and Connector | to suit application |
Download Datasheet

Flexible High Temperature FBG Sensor

- Machine Condition Monitoring
- Power Plants Transformers
- Chemical Processes
- Conveyor Systems
- High Temperature Environments
Physical specifications:
Sensor Construction | Capillary Loose Tube |
Dimension (φ x L) | 1.2 mm x L (Sensor Length to suit application) |
Flexibility | Down to 300 mm diameter |
Package material | Stainless steel AISI 304 or other options |
Optical specifications:
Fiber Type | Single-mode SMF-28 9/125 μm |
FBG Wavelength (CWL) | 1.460 ÷ 1.620 nm |
FBG Bandwidth (FWHM) | 0,25 nm (typical) |
FBG Peak Reflectivity (R) | > 50 % |
Side Lobe Suppression Ratio (SLSR) | > 15dB |
Sensors Spacing (D) | > 7 mm (Customizable) |
Sensors Number | Custom to suit application |
Measurement Range | -50 to 500 °C (600 °C R&D) |
Sensor Resolution | 0,1 °C (depending on FBG interrogator) |
Sensor Accuracy | 0,5 °C (depending on FBG interrogator) |
Cable Length and Connector | to suit application |
Download Datasheet

Smart Washer for Bolted Joints

- Structural load monitoring
- Aerospace and automotive testing
- Industrial machinery diagnostics
- Smart bolted connections
- Harsh environment force sensing
Physical specifications:
Form factor | Customizable (Inner hole, shape) |
Minimum Outer Diameter | 25 mm (<25 mm R&D) |
Minimum Thickness | 4 mm (<4 mm R&D) |
Package material | Application customizabled (e.g. aluminum. stainless steel, titanium) |
Operating Temperature | -80 °C to +250 °C |
IP Grade | up to IP68 |
Measurement specifications:
Measurement Capacities | > 30 kN |
Sensor Technology | Multiple Fiber Bragg Gratings (FBGs) |
Resolution | Up to 0.05% of full scale (application dependent) |
Sampling Rate | Depending on used FBG interrogator |
FBG Central Wavelength | Within the range 1460 ÷ 1620 nm |
FBG Bandwidth | 1 nm (typical) |
Temperature Compensation | Reference Temperature FBGs (optional) |
Download Datasheet
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