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Optimization of the total bandwidth of the modulator/deflector of an acousto‐optical spectrum analyzer used in radio‐astronomy applications
Author(s) -
Garde M. J.,
Sebastian J. L.,
Benito D.,
Aramburu C.
Publication year - 1994
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650071803
Subject(s) - bandwidth (computing) , spectrum analyzer , physics , optics , engineering , telecommunications
The acoustic and the Bragg bandwidths can be optimized by using a modified mass electrode for the TeO 2 crystal and a quasitangent interaction instead of the classical tangent interaction, respectively. These optimizations lead to a 40% increase of the total bandwidth of the modulator/deflector. Therefore, a higher value of the ‐3‐dB‐bandwidth‐spectral‐resolution ratio N is obtained. This allows us to study both wider spectral lines (up to 90 MHz) and lines separated no more than 90 MHz, which means sauing costly real observation time. © 1994 John Wiley & Sons, Inc.