Thermal control of a dual mode parametric sapphire transducer.

Authors :: Belfi J
Beverini N
De Michele A
Gabbriellini G
Mango F
Passaquieti R
Source :: IEEE transactions on ultrasonics, ferroelectrics, and frequency control [IEEE Trans Ultrason Ferroelectr Freq Control] 2010 Jan; Vol. 57 (1), pp. 121-5.
Publication Year :: 2010
Abstract: We propose a method to control the thermal stability of a sapphire dielectric transducer made with 2 dielectric disks separated by a thin gap and resonating in the whispering gallery (WG) modes of the electromagnetic field. The simultaneous measurement of the frequencies of both a WGH mode and a WGE mode allows one to discriminate the frequency shifts due to gap variations from those due to temperature instability. A simple model, valid in quasi-equilibrium conditions, describes the frequency shift of the 2 modes in terms of 4 tuning parameters. A procedure for their direct measurement is presented.

Subjects :: Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Reproducibility of Results
Sensitivity and Specificity
Vibration
Aluminum Oxide chemistry
Membranes, Artificial
Micro-Electrical-Mechanical Systems instrumentation
Transducers

Language :: English
ISSN :: 1525-8955
Volume :: 57
Issue :: 1
Database :: MEDLINE
Journal :: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Publication Type :: Academic Journal
Accession number :: 20040435
Full Text :: https://doi.org/10.1109/TUFFC.2010.1387