n - Fachhochschule Jena
n - Fachhochschule Jena
n - Fachhochschule Jena
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Principle of Micro-Bending Fiber-Optic Sensors<br />
Optical transmission losses (leaky modes) caused by periodic fiber bending<br />
Interference of core modes and cladding modes:<br />
Core modes (e.g., n eff = n c ) ⇒ Cladding modes (e.g., n eff = n cl )<br />
Max. sensitivity (losses) at optimal bending period L opt :<br />
(L opt ) -1 = ( λ / n c ) -1 – ( λ / n cl ) -1<br />
L opt mechanical transducer<br />
Cladding, n cl<br />
Core, n c<br />
Example:<br />
n c = 1,460<br />
n cl = 1,459<br />
λ = 0,8 µm<br />
L opt = 0,8 mm<br />
FOS - 20
Change language