Fiber Bragg Gratings

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-fbg-miniatureSingle FBG can be used for sensing temperature and strain as well as for many physical and chemical parameters if properly packaged. Several coatings (acrylate, polyimide or metallic) and manufacturing parameters (length, bandwidth, peak reflecticvity) are available for industrial applications, even in harsh environments with ATEX and high temperatures requirements.
Single FBG
Single Fiber Bragg Grating
fbg technology
 
Typical applications:
  • 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
array-fbg-miniatureArray of FBGs can be offered in a wide range of optical specifications and material options to meet all customer requirements. It is possible to write dozens of FBG in a single optical fiber. Custom FBG spacing, several coatings and manufacturing parameters (length, bandwidth, peak reflecticvity) are available for quasi-distributed long-term sensing applications.
Array of FBGs
Single Fiber with Array of Bragg Gratings
array of fbgs
 
Typical applications:
  • 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
ht tube500 miniatureHT-Tube500 is a in-well temperature sensor for harsh environments with operating temperatures up to 500°C (600 °C R&D). Its stainless steel rigid metallic tube (5 mm typical outer diameter) holds a cascade of FBG sensors, which enables the insertion temperature profile over the thickness of components.
HT-Tube500
Rugged In-Well High Temperature FBG Sensor
ht tube500
 
Typical applications:
  • 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
ht flex500 miniatureHT-Flex500 is a flexible temperature sensor for harsh environments with operating temperatures up to 500°C (600 °C R&D). Its stainless steel flexible capillary tube (1.2 mm typical diameter) holds a cascade of FBG sensors, which enables both surface and embedded installations, even within extremely small wells.
HT-Flex500
Flexible High Temperature FBG Sensor
ht flex500
 
Typical applications:
  • 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

Company

INFIBRA TECHNOLOGIES Srl is engaged in designing and manufacturing of next-generation fiber optic sensors systems, while also offering engineering services. Energy, Oil & Gas, Transportation and Civil Engineering are our target markets, with solutions even suitable for harsh environments. Monitoring of temperature, vibration, deformation, or other chemical-physical parameters through a single optical fiber are our typical applications and FBGs, Raman, Brillouin and Rayleigh are our technologies.

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Headquarters

  Via Emilia 323A, Pisa, 56121
  +39 050 7917951
   info@infibratechnologies.com

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