We describe the design and characterization of a silicon nanophotonic waveguide (SNW) and its use in a reconfigurable
microwave photonic filter (MPF). The SNW is dispersion tailored for efficient on-chip four-wave-mixing. We use the onchip
four-wave-mixing to increase the number of taps in our multiple tap delay line MPF. The tap levels are controlled by
a programmable filter. Using a 12 mm long SNW reduces the footprint by five orders of magnitude compared to silica
highly nonlinear fiber while only requiring approximately two times more input power.
Proc. SPIE. 8074, Holography: Advances and Modern Trends II
KEYWORDS: Holograms, 3D image reconstruction, Digital holography, Wavelets, Spatial light modulators, Digital imaging, Charge-coupled devices, Digital recording, Continuous wavelet transforms, 3D image processing
We propose to record digital Fourier hologram of a 3D diffused object and to reconstruct numerically and optically by
using phase-only information. This phase-only information is obtained by using 1D-Continuous Wavelet Transform (1DCWT)
from the intensity of digital Fourier Hologram. 3D object image is obtained by numerical reconstruction on
computer and optical reconstruction by using a phase-modulated liquid crystal spatial light modulator (SLM). Numerical
and experimental results are presented.
Proc. SPIE. 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics
KEYWORDS: Fringe analysis, Optical signal processing, Interferometers, Fourier transforms, Linear filtering, Signal processing, 3D metrology, Signal analysis, Filtering (signal processing), 3D profilers
In this paper, the processing of interference fringes is achieved by Hartley transform method. The experimental and
simulated interference fringe patterns are used for the signal analysis. Phase results are presented. These are compared
with phase obtained by Fourier transform method. Disadvantages and advantages of Hartley transform method used for
the evaluation of interference fringe patterns are given.
This paper proposes the use of the Hilbert transform for analysis of fringe patterns, which are obtained in Michelson
Interferometer. The fringe patterns are evaluated by Continuous wavelet transform and Hilbert transform algorithms to
obtain phase map and refractive index. Continuous wavelet transform algorithm shows a better filtering effect. However
Hilbert transform algorithm gives a noisy result, since its frequency spectrum has harmonic noise. Results show that the
phase map is affected by Hilbert Filter.
This paper proposes the characterization of thermal lens by white light interferometry on the Methylene -blue/water
solution. Thermal lens effect is determined by local phase, which is obtained by analyzing the thermal lens fringes with
single sideband modulation method.