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Multichannel acoustooptical spectrum analyzers with
the time integration
Martynyuk-Lototska I.Yu., Vlokh R.O.
Institute of Physical Optics, 23 Dragomanova Str., 79005,
Lviv, Ukraine
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The multichannel spectrum analyzers on the base of Michelson (with one
acoustooptical modulator) and Mach-Zehnder (with two acoustooptical modulators)
interferometers in which chirp transformation algorithm are designed and
experimentally studied. As multichannel input acoustoptical deflector is
used. Experimentally obtained performance characteristics for spectrum
analyzer on the base of Michelson interferometer with PbMoO4
acoustooptical deflector and flint glass acoustooptical modulator are:
bandwidth Df=3.3kHz and resolution 55Hz
at time integration 20ms; and - on the base of Mach-Zehnder interferometer
with TeO2 acoustooptical modulators and deflector are: bandwidth
Df=9.25kHz,
resolution 52Hz at time integration 20ms and 14Hz at time integration 80ms,
respectively
Key words: acoustooptical modulator, acoustooptical deflector, chirp
transformation, spectrum analyzer
doi 10.3116/16091833/2/2/76/2001 |
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doi:10.1063/1.93427
http://dx.doi.org/10.1063/1.93427 |