Multi-core FBG sensor

Product description

IDIL designs and manufactures a new range of FBG sensors based on multi core fibers. These innovative sensors provide reliable temperature and strain measurements with redundancy. They have been successfully tested in our R&D projects. Multi-core FBG sensors are well suited for applications requiring simultaneous measurement of strain and temperature in advanced composite materials, including carbon, metal and glass-based composites. They are available with fibers from our partner Photonics Bretagne with 2, 4 or 7 cores.

Single FBG: 1 FBG positioned arbitrarily along the fiber
FBG array: Up to 20 FBGs at arbitrary positions
Customizable spectral and manufacturing parameters

FEATURES

Redundant measurements with multi-core fiber
FBGs operate at the same wavelength in each core
Accurate, ultra thin and lightweight
Act as temperature or elongation sensor
Relative precision : 10pm/°C and 1.2pm/µƐ
Measurement speed (interrogator-dependent)
100% passive sensor
Immune to EMI/RFI
Short active FBG length
Optional coatings and terminations
High thermal stability

SPECIFICATION


MULTI CORE FBG SENSOR
Number of FBG sensors	Single FBG, FBG array (up to 20 FBGs at arbitrary positions, more on request)
FBG profile	Uniform, Chirped
FBG wavelength	1 µm to 1.6 µm
FBG bandwidth (FWHM)	0.25 nm to 1 nm (more on request)
FBG reflectivity (HR)	>50% typical
Active FBG length	5 to 20 mm (others on request)
FBG reflectivity (HR)	>50% (others on demand)
Fiber type	Multi-core (2, 4, 7)
FBG SLSR	>10dB in center core; The FBGs in all cores provide good contrast for monitoring
Measurement speed	Interrogator-dependent
Relative precision	10pm/°C and 1.2pm/µƐ
FBG packaging	None, Acrylate (up to 80°C), High temperature acrylate (up to 150°C), Metal tubing or Custom
Optical connection	Fan-out provided + FC/APC (others on request)
Fiber pigtail length	1 m both side (others on request)
Jacket	None, loose tube (PVC, Stainless steel, PEEK, PTFE