Stock Code:601869.SH / 06869.HK

Brillouin Sensing Fibre

Brillouin sensing fibre is manufactured by the advanced plasma chemical vapor deposition(PCVD) process. The fibre shows extremely refined refractive index (Rl) profile control, excellent geometrical performance, low attenuation, etc. Brillouin gain spectrum of the optical fibre has good single peak property through process control. Through testing experiment, temperature coefficient and strain coefficient are explicit. The double-layer UV-curable acrylate coating ensures the fibre excellent anti- bending performance.
Applications
  • Brillouin distributed temperature and strain sensing system
Characteristics
  • Excellent optical properties and geometrical indicators
  • Brillouin gain spectrum with single peak property
  • ​Accurate Brillouin center frequency
  • Definite temperature coefficient and strain coefficient
  • Low attenuation
  • Low splicing loss
  • Excellent bending insensitivity

Specifications

 

Fibre Type

Brillouin Sensing Fibre

Optical Properties

Loss (dB/km)

@1310nm

≤0.34

@1383nm

≤0.34

@1550nm

≤0.20

@1625nm

≤0.23

Cut-off Wavelength (nm)

≤1260

MFD (μm)

@1310nm

8.7~9.5

@1550nm

9.9-10.9

Brillouin Ceter Frequency (GHz)

10.7

Strain Coefficient (uε/MHz)

19.26±0.2

Temperature Coefficient (°C/MHz)

0.97±0.02

Geometrical Properties

Cladding Diameter (μm)

125.0±0.7

Non-circularity of Cladding (%)

≤1.0

Coating Diameter (nm)

245±0.7

Coating/Cladding Concentricity (nm)

≤12.0

Non-circularity of Coating (%)

≤6.0

Core/Cladding Concentricity (μm)

≤0.6

Macro Bending Attached Attenuation

Macrobend Loss(dB)

 

One Circle, Radius 16mm

@1550nm

≤0.05

One Hundred Circles, Radius 25mm

@1310nm

≤0.05

@1550nm

≤0.05

Mechanical Properties

Proof  Test Level (kpsi)

≥100

Environmental Properties

Temperature Additional Attenuation (dB/km)

- 60°C~ + 85°C

≤0.05

 

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