n - Fachhochschule Jena
n - Fachhochschule Jena
n - Fachhochschule Jena
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FBG Sensor System: Basic Configuration<br />
• Broadband light source 800...850nm (LED, SLD)<br />
• Polychromator: imaging diffractive grating (polymer replicated by embossing) & CCD detector<br />
• Advantages: high performance & low-cost potential, higher WDM capacity than @ 1550nm<br />
Source<br />
spectrum<br />
820 840 860 880<br />
Wavelength [nm]<br />
Spectrum analyzer<br />
Polychromator<br />
Broadband light source<br />
Superluminescence diode SLD<br />
Fiber optic<br />
beam splitter<br />
CCD array<br />
Fiber Connector<br />
(switch)<br />
Reference<br />
wavelength<br />
Reflection spectrum<br />
of sensor network<br />
825 830 835 840 845 850<br />
Wavelength [nm]<br />
FBG1<br />
FBG2<br />
FBG3<br />
FBG4<br />
FBG5<br />
Sensor array attached<br />
to measuring object<br />
FOS - 61
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