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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-21 20:54 |
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Conference: Bucharest University Faculty of Physics 2008 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
The 42m electrooptic modulator as a frequency transmitter and as a frequency doubler
Authors:
Vladimir Manea, Marian Mogîldea
Affiliation:
Faculty of Physics, University of Bucharest, P.O.Box MG-11, 0771253 Bucharest – Măgurele, Romania
E-mail
vladimir.manea@yahoo.com
marian_mogildea@yahoo.com
Keywords:
electrooptic modulation, light polarization, spectral analysis, polarization dynamics
Abstract:
A theoretical and experimental analysis of two applications of the 42m electrooptic modulator is performed in the time and in the frequency domains. The analysis refers to the case of a harmonic electric input signal. The two applications are that of frequency transmitter, when the modulation is linear and the output signal has the same frequency as the modulating voltage, and that of frequency doubler, when the modulation is not linear but the output is a clean harmonic signal with twice the modulating frequency. Experimental recordings of the output signal and of its frequency spectrum are given, as function of the amplitude of the modulating voltage. The recordings are presented in comparison to some graphical representations of the output, resulting from the theoretical considerations. By means of a Bessel analysis, conditions for achieving single-frequency outputs are obtained.
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