Inhomogeneous phase-visibility modulating interferometry by space on-off non-quadrature amplitude modulation.
A new method in interferometry based on on-off non-quadrature amplitude modulation for object phase retrieval is presented. Although the technique introduces inhomogeneous visibility and phase variations in the interferogram, it is shown that the phase retrieval of a given object is still possible. This method is implemented by using three beams and two Mach-Zehnder interferometers in series. One of the arms of the system is used as a probe beam and the other two are used as reference beams, yielding from their sum the conventional reference beam of a two-beam interferometer. We demonstrate that, if there is a phase difference within the range of (0,π) between these two beams, the effect of modulation in both amplitude and phase is generated for the case of on-off non-quadrature amplitude modulation. An analytical discussion is provided to sustain this method. Numerical and experimental results are also shown.
Facultad de Ciencias Físico-Matemáticas, Benemérita Universidad Autónoma de Puebla, Apdo. Postal 165, Puebla, Pue. 72000, México.
Uriel
U
Rivera-Ortega
Cruz
C
Meneses-Fabian
Gustavo
G
Rodriguez-Zurita
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D008962:Models, Theoretical; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*