We have demonstrated two monolithically integrated Bragg grating based accelerometers, both with the optical path and mechanical structure being made from the same substrate. The unique fabrication techniques, Direct UV Writing and precision dicing, used to create the glass microcantilevers are discussed. We show experimental results from two different Bragg grating based interrogation systems, one utilizing a single Gaussian apodized Bragg grating and the other utilizes two spectrally matched Bragg gratings forming a Fabry-Pérot interferometer. Sinusoidal accelerations were applied to both devices and their sensitivities were found to be 0.67±0.035 mV/g and 14.0±0.44 mV/g for the single Bragg grating and Fabry-Pérot interferometer respectively.

Date Published: 15 March 2013
PDF: 8 pages
Proc. SPIE 8614, Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS and Nanodevices XII, 86140K (15 March 2013); doi: 10.1117/12.2004418

Published in SPIE Proceedings Vol. 8614:
Reliability, Packaging, Testing, and Characterization of MOEMS/MEMS and Nanodevices XII
Rajeshuni Ramesham; Herbert R. Shea, Editor(s)