Open Access45° double-drive photoelastic modulation
Author(s) -
Kewu Li,
Zhibin Wang,
Liming Wei,
Rui Zhang
Publication year - 2016
Publication title -
journal of the optical society of america. a, optics, image science, and vision./journal of the optical society of america. a, online
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.803
H-Index - 158
eISSN - 1520-8532
pISSN - 1084-7529
DOI - 10.1364/josaa.33.002041
Subject(s) - optics , modulation (music) , actuator , azimuth , materials science , piezoelectricity , amplitude modulation , amplitude , photoelasticity , voltage , phase modulation , physics , frequency modulation , acoustics , radio frequency , electrical engineering , engineering , quantum mechanics , phase noise , composite material , solid mechanics
In this report, a new type of double-drive photoelastic modulation effect is studied. Two piezoelectric actuators are connected to a symmetric photoelastic crystal at an angle of 45°. The actuators and crystal have the same resonant frequency. By adjusting the amplitude and phase difference between the driving voltages of the two piezoelectric actuators, two special forms of photoelastic modulation can be realized, namely, a pure standing wave form and a pure traveling wave form. The retardation magnitude and the azimuth angle of the modulation fast axis can be regulated in the pure standing wave, and the modulation axis moves circumferentially in the pure traveling wave. We have experimentally observed the two special photoelastic modulation modes, and the test and calibration methods are also reported.