Partha P. Banerjee

Syracuse University, Syracuse, New York, United States

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Publications (276)237.27 Total impact

  • G. Nehmetallah · J. Khoury · P. P. Banerjee
    No preview · Article · May 2016 · Applied Optics
  • No preview · Conference Paper · May 2016
  • Source
    Han Li · Joseph W. Haus · Partha P. Banerjee
    Full-text · Dataset · Apr 2016
  • No preview · Conference Paper · Apr 2016
  • Diane Beamer · Ujitha Abeywickrema · Partha Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: Multi-wavelength Fresnel digital holography is used to extract 3D features of objects imaged using a confocal system. The computed phase around the image plane using the synthetic wavelength gives the depth of the original object.
    No preview · Conference Paper · Apr 2016
  • Source
    Diane Beamer · U. Abeywickrema · P. Banerjee · T.-C. Poon
    [Show abstract] [Hide abstract] ABSTRACT: Digital holography uses phase imaging in a variety of techniques to produce a three dimensional phase resolved image that includes accurate depth information about the object of interest. Multi-wavelength digital holography is an accurate method for measuring the topography of surfaces. Typically, the object phases are reconstructed for two wavelengths separately and the phase corresponding to the synthetic wavelength (obtained from the two wavelengths) is obtained by calculating the phase difference. Then the surface map can be obtained using proper phase-unwrapping techniques. Usually these synthetic wavelengths are on the order of microns which can be used to resolve depths on the order of microns. In this work, two extremely close wavelengths generated by an acousto-optic tunable filter (AOTF) are used to perform two-wavelength digital holography. Since the difference between the two wavelengths is on the order of picometers, a large synthetic wavelength (on the order centimeters) can be obtained which can be used to determine the topography of macroscopic surface features. Also since the synthetic wavelength is large, an accurate surface map can be obtained without using a phase-unwrapping technique. A 514 nm Argon-Ion laser is used as the beam source, employed with an AOTF to generate the zeroth order and first order diffracted order which are used as the two wavelengths. Both beams are aligned through the same spatial filter assembly. Holograms are captured subsequently using a typical Mach-Zehnder setup by blocking one beam at a time. Limitations of the large synthetic wavelength is also discussed.
    Full-text · Conference Paper · Mar 2016
  • George Nehmetallah · Partha Banerjee · Jed Khoury
    No preview · Article · Nov 2015 · Applied Optics
  • Partha Banerjee · Mahmudunnabi Basunia
    No preview · Conference Paper · Sep 2015
  • Source
    Han Li · Joseph W. Haus · Partha P. Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: Generalization of the transfer matrix method is developed to analyze Type I second-harmonic generation in linear-nonlinear multilayer one-dimensional photonic bandgap structures for oblique incidence of a nondepleted fundamental. The advantage of the transfer matrix method is that it takes into account reflections and interferences between all forward and backward propagating fundamental and second-harmonic waves. The conversion efficiency is calculated as a function of the incident angle of the fundamental and the thicknesses of the linear and nonlinear layers. Specific incident angles and thicknesses may generate relatively high conversion efficiency inside nonlinear material. Our analytical and numerical analyses show that the conversion efficiency of second-harmonic generation depends on the fundamental pump power, second-order susceptibility, and field enhancement in the photonic bandgap structure. Upper bounds on pump intensity can be found for a given incidence angle and sample thickness where the nondepleted pump approximation can be used to model such a nonlinear structure.
    Full-text · Article · Jul 2015 · Journal of the Optical Society of America B
  • [Show abstract] [Hide abstract] ABSTRACT: The amplitude and phase of the complex optical field in the Helmholtz equation obey a pair of coupled equations, arising from equating the real and imaginary parts. The imaginary part yields the transport of intensity equation (TIE), which can be used to derive the phase distribution at the observation plane. In this paper, we demonstrate the use of TIE to recover the 3D image of an amplitude object embedded in a phase object. The phase object is created by heating a liquid, comprising a solution of red dye in alcohol, using a focused 514 nm laser beam to the point where self-phase modulation of the beam is observed. The induced phase due to the pump beam is also obtained using regular in-line holography and compared with results obtained from TIE. Our work can find applications in, for instance, referenceless 3D imaging of debris in a fireball, and is also well suited for moving objects.
    No preview · Article · May 2015
  • Georges Nehmetallah · Partha Banerjee · Jed Khoury
    [Show abstract] [Hide abstract] ABSTRACT: The nonlinearity inherent in four-wave mixing in photorefractive (PR) materials is used for adaptive filtering. Examples include script enhancement on a periodic pattern, scratch and defect cluster enhancement, periodic pattern dislocation enhancement, etc. through intensity filtering image manipulation. Organic PR materials have large space-bandwidth product, which makes them useful in adaptive filtering techniques in quality control systems. For instance, in the case of edge enhancement, phase conjugation via four-wave mixing suppresses the low spatial frequencies of the Fourier spectrum of an aperiodic image and consequently leads to image edge enhancement. In this work, we model, numerically verify, and simulate the performance of a four wave mixing setup used for edge, defect and pattern detection in periodic amplitude and phase structures. The results show that this technique successfully detects the slightest defects clearly even with no enhancement. This technique should facilitate improvements in applications such as image display sharpness utilizing edge enhancement, production line defect inspection of fabrics, textiles, e-beam lithography masks, surface inspection, and materials characterization.
    No preview · Article · Apr 2015 · Proceedings of SPIE - The International Society for Optical Engineering
  • U. Abeywickrema · P. P. Banerjee · N. T. Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: The use of a low-power laser beam to characterize self-phase modulation (SPM) and bubble formation during thermal blooming (TB), as well as manipulation of the bubbles, is reported. First, a low-power 633 nm laser beam is used to characterize the induced refractive index profile during SPM of a focused 514 nm pump beam in absorbing liquid media, e.g., a solution of red dye in isopropyl alcohol. The induced phase change is also characterized using digital holography via the 633 nm source as the probe and reference. During TB at higher pump powers, bubble formation occurs in the liquid. Using a modified setup, which minimizes the effects of gravity, buoyancy, and convection, stable bubbles are generated. These are characterized using in-line digital holography with the 633 nm probe beam. It is shown that the bubble size depends on exposure time of the pump and that the bubble can be steered by moving a focused low-power laser beam. Finally, possible applications of these thermally generated bubbles are discussed.
    No preview · Article · Apr 2015 · Applied Optics
  • Source
    Han Li · Joseph W. Haus · Partha P. Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: Second harmonic generation generated by an obliquely incident fundamental wave in a nonlinear photonic bandgap structure is analyzed by applying the transfer matrix method, where multiple reflection and interference effects are taken into account. The radiation of fundamental and second harmonic waves from the exit plane of the nonlinear photonic bandgap structure, and the distribution of the fields within the structure are discussed. Under the non-depleted pump wave assumption, the conversion efficiency of the second harmonic wave versus the incident angle of the fundamental is studied in detail.
    Full-text · Article · Feb 2015
  • Logan A. Williams · Georges Nehmetallah · Rola Aylo · Partha P. Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: Fresnel transform implementation methods using numerical preprocessing techniques are investigated in this paper. First, it is shown that up-sampling dramatically reduces the minimum reconstruction distance requirements and allows maximal signal recovery by eliminating aliasing artifacts which typically occur at distances much less than the Rayleigh range of the object. Second, zero-padding is employed to arbitrarily scale numerical resolution for the purpose of resolution matching multiple holograms, where each hologram is recorded using dissimilar geometric or illumination parameters. Such preprocessing yields numerical resolution scaling at any distance. Both techniques are extensively illustrated using experimental results.
    No preview · Article · Feb 2015 · Applied Optics
  • Partha P. Banerjee · Dean Evans · Ujitha Abeywickrema
    No preview · Conference Paper · Jan 2015
  • Source
    Han Li · Partha P. Banerjee · Joseph Haus
    Full-text · Conference Paper · Jan 2015
  • Peiyun Li · Yun Zhao · Partha P. Banerjee · Andy Chong
    No preview · Conference Paper · Jan 2015
  • Ujitha Abeywickrema · Partha Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: Holographic interferometry is an effective and rich method for measuring very small (order of a wavelength) deformations of an object and is widely used for non-destructive testing. In this work, the use of photorefractive materials for implementing real time phase shifting holographic interferometry is examined in detail. Bragg and non-Bragg orders generated during two- and multi-beam coupling in a photorefractive material can be used to retrieve the deformation of the object, or the phase information of the object. In previous work, it has been shown that object deformation can be determined from monitoring Bragg and non-Bragg orders. Preliminary experiments for determining the depth profile of an object have been reported, along with approximate analytic solutions for the Bragg and non-Bragg orders for the case of interacting plane waves. In this work, the exact solutions of Bragg and non-Bragg orders are found from numerically solving the interaction equations in a photorefractive material. It is shown that if the grating written in the material using two waves is read out by a reference and the object, the resulting Bragg and non-Bragg orders contain the information of the object phase, and is dependent on material parameters and the writing and reading beam intensities. Similarities and differences between this dynamic holographic technique and the traditional phase shifting digital holography are extensively discussed.
    No preview · Conference Paper · Sep 2014
  • Source
    S. Memarzadeh · G. T. Nehmetallah · P. P. Banerjee
    [Show abstract] [Hide abstract] ABSTRACT: Non-interferometric intensity based methods of phase retrieval such as the transport of intensity (TI) employs a simple experimental technique for amplitude and phase reconstruction of a static object by capturing several diffraction patterns at different observation planes. The purpose of this work is to numerically and experimentally extend this technique to moving phase and amplitude objects. The simulation part is done based on solving the TI equation (TIE) using the Fast Fourier Transform (FFT) method, and the amplitude and the calculated phase in the detection plane is numerically back-propagated to the object plane using the paraxial transfer function. Furthermore, we illustrate how a static 3D phase and/or amplitude object can also be reconstructed tomographically by illuminating it at multiple angles. For illustration purposes, the object is mounted on a rotating stage and multiple diffraction patterns are captured for different angles and at different observation planes. The reconstructed optical fields are tomographically recomposed to yield the final 3D shape using a simple multiplicative technique. The tomographic technique can be generalized for the case of 3D moving objects. Finally, we have used TIE to determine the phase induced in a liquid due to heating by a focused laser beam, which causes self-phase modulation of the beam.
    Full-text · Conference Paper · Jun 2014
  • [Show abstract] [Hide abstract] ABSTRACT: Various matched filter based architectures have been proposed over the last two decades to optimize the target detection and recognition performance. While these techniques provide excellent performance with respect to one or more parameters, a unified and synergistic approach to evaluate the performance of these techniques under the same constraints is yet to be done. Consequently, in this paper, we used a set of generalized performance metrics for comparing the performance of the recently reported matched filter based techniques using various types of infrared and SAR datasets. Test results obtained using the aforementioned datasets and performance metrics provide excellent information with respect to the suitability of existing filter based techniques for various target detection and tracking practical applications.
    No preview · Conference Paper · May 2014

Publication Stats

1k Citations
237.27 Total Impact Points

Institutions

  • 1985-2013
    • Syracuse University
      • Department of Electrical Engineering and Computer Science
      Syracuse, New York, United States
  • 2004
    • University of Dayton
      • Department of Electrical and Computer Engineering
      Dayton, Ohio, United States
  • 1991-2000
    • University of Alabama in Huntsville
      • Department of Electrical and Computer Engineering
      Huntsville, Alabama, United States
  • 1997
    • Virginia Polytechnic Institute and State University
      • Department of Electrical and Computer Engineering
      Blacksburg, Virginia, United States
  • 1992
    • University of Alabama
      • Department of Electrical and Computer Engineering
      Tuscaloosa, Alabama, United States
  • 1990
    • Virginia State University
      Петербург, Virginia, United States
  • 1988
    • University of Wisconsin–Madison
      Madison, Wisconsin, United States
  • 1981-1985
    • University of Iowa
      • Department of Electrical and Computer Engineering
      Iowa City, Iowa, United States