A digital electronic system for use in interferometry
- 1 November 1977
- journal article
- Published by IOP Publishing in Journal of Physics E: Scientific Instruments
- Vol. 10 (11), 1121-1124
- https://doi.org/10.1088/0022-3735/10/11/010
Abstract
A digital electronic system is described which drives a piezoelectrically scanned Fabry-Perot interferometer. The basis of this system is a voltage ramp generated by a digital-to-analogue converter (DAC). A correction to compensate for the nonlinear characteristics of the piezoelectric ceramics is given. Use is made of the digital nature of the ramp to perform several functions useful in modern Brillouin scattering. These are: protection of the detector against the high light levels experienced in multipassed interferometry, ability to change scanning speed before and during data collection, protecting acquired data against laser 'mode-hopping' and the scanning of two Fabry-Perot interferometers in series.Keywords
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