First order phase change detection using planar waveguide Bragg grating refractometer

Sparrow, I.J.G., Emmerson, G.D., Gawith, C.B.E., Smith, P.G.R., Kaczmarek, M. and Dyadyusha, A. (2005) First order phase change detection using planar waveguide Bragg grating refractometer. Applied Physics B: Lasers and Optics, 81, (1), 1-4. (doi:10.1007/s00340-005-1872-8).


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Solid-to-liquid and gas-to-liquid phase changes in water and ordered-to-isotropic phase changes in a nematic liquid crystal are detected with an optical sensor. A planar Bragg grating defined purely by refractive index modulation is covered with a water or liquid crystal overcladding and the temperature is controlled to trigger phase changes. Measurement of the Bragg wavelength allows changes of effective refractive index to be detected and discontinuities in behaviour caused by phase transitions can be clearly identified.

Item Type: Article
ISSNs: 0946-2171 (print)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > T Technology (General)
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy > Quantum, Light and Matter
University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 30204
Date Deposited: 11 May 2006
Last Modified: 20 Aug 2015 09:34

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