Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Waveguide bragg gratings in Ormocer®s for temperature sensing

 
: Girschikofsky, Maiko; Rosenberger, Manuel; Förthner, Michael; Rommel, Mathias; Frey, Lothar; Hellmann, Ralf

:
Fulltext (PDF; )

Sensors. Online journal 17 (2017), No.11, Art. 2459, 9 pp.
http://www.mdpi.com/journal/sensors
ISSN: 1424-8220
ISSN: 1424-8239
Deutsche Forschungsgemeinschaft DFG
HE5150/1-1
Bragg-Gitter-Sensoren auf Basis von Hybridpolymeren - Grundlegende Untersuchungen und Realisierung
Deutsche Forschungsgemeinschaft DFG
FR713/10-1
Bragg-Gitter-Sensoren auf Basis von Hybridpolymeren - Grundlegende Untersuchungen und Realisierung
English
Journal Article, Electronic Publication
Fraunhofer IISB ()
Bragg Grating; temperature; humidity; hybrid polymer; ORMOCER®

Abstract
Embedded channel waveguide Bragg gratings are fabricated in the Ormocer® hybrid polymers OrmoComp®, OrmoCore, and OrmoClad by employing a single writing step technique based on phase mask technology and KrF excimer laser irradiation. All waveguide Bragg gratings exhibit well-defined reflection peaks within the telecom wavelengths range with peak heights of up to 35 dB and −3 dB-bandwidths of down to 95 pm. Furthermore, the dependency of the fabricated embedded channel waveguide Bragg gratings on changes of the temperature and relative humidity are investigated. Here, we found that the Bragg grating in OrmoComp® is significantly influenced by humidity variations, while the Bragg gratings in OrmoCore and OrmoClad exhibit linear and considerably high temperature sensitivities of up to −250 pm/ ∘ C and a linear dependency on the relative humidity in the range of −9 pm/%.

: http://publica.fraunhofer.de/documents/N-470419.html