Miniaturization of Bragg-multiplexed membrane transducers
Holmes, C., Carpenter, Lewis G., Gates, J.C. and Smith, P.G.R. (2012) Miniaturization of Bragg-multiplexed membrane transducers. Journal of Micromechanics and Microengineering, 22, (2), 025017. (doi:10.1088/0960-1317/22/2/025017).
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This paper reports the miniaturization of Bragg-multiplexed pressure sensing membranes for integrated photonic chips. The analysis compares a novel Fabry-Pérot Bragg grating (FPBG) design that integrally spans a thin (54 μm) silica membrane to a recently reported single Bragg grating (BG) design that resides within the membrane. Unlike the single BG, the FPBG maintains spectral integrity as the dimensions of the membrane become sub-millimetre. In addition it is shown that the FPBG structure can also be used for inherent temperature referencing, having a Bragg thermal sensitivtiy of 13.5 pm °C-1, which can be decoupled from pressure effects. For the reported sub-millimetre membrane, pressure resolution was enhanced by a factor of three and spectral bandwidth reduced by over five-fold.
|Digital Object Identifier (DOI):||doi:10.1088/0960-1317/22/2/025017|
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Physical Sciences and Engineering > Optoelectronics Research Centre
|Date Deposited:||29 Feb 2012 14:40|
|Last Modified:||29 Jun 2015 15:39|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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