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It is known that partially (spatial) coherent beams can reduce the effects of scintillation in a free space optical link. However, practical implementations of this type of beam are still under investigation. In this work we apply a wave optics model to analyze the propagation through turbulence of a coherent beam and a particular version of a… (More)

- Vimal Thilak, David G Voelz, Charles D Creusere
- Applied optics
- 2007

A passive-polarization-based imaging system records the polarization state of light reflected by objects that are illuminated with an unpolarized and generally uncontrolled source. Such systems can be useful in many remote sensing applications including target detection, object segmentation, and material classification. We present a method to jointly… (More)

- Javier Perez-Ramirez, Deva K. Borah, David G. Voelz
- IEEE Trans. Vehicular Technology
- 2013

Optimal placement of sensors or landmarks for the localization of an autonomous guided vehicle (AGV) based on range measurements is considered. The optimization relies on the Fisher information matrix (FIM). A closed-form expression of the FIM determinant is obtained for two dimensional (2D) and three dimensional (3D) spaces considering heterogeneous… (More)

- Stephen D Lyke, David G Voelz, Michael C Roggemann
- Applied optics
- 2009

The probability density function (PDF) of aperture-averaged irradiance fluctuations is calculated from wave-optics simulations of a laser after propagating through atmospheric turbulence to investigate the evolution of the distribution as the aperture diameter is increased. The simulation data distribution is compared to theoretical gamma-gamma and… (More)

- Juan Castorena, Charles D. Creusere, David G. Voelz
- IGARSS
- 2010

One of the major problems associated with LIDAR sensing is that significant amounts of data must be collected to obtain detailed topographical information about a region. Current efforts to solve this problem have focused on designing compression algorithms which operate on the collected data. Typical compression algorithms, however, require the collection… (More)

- Santasri Basu, Milo W Hyde, Xifeng Xiao, David G Voelz, Olga Korotkova
- Optics express
- 2014

Two different methodologies for generating an electromagnetic Gaussian-Schell model source are discussed. One approach uses a sequence of random phase screens at the source plane and the other uses a sequence of random complex transmittance screens. The relationships between the screen parameters and the desired electromagnetic Gaussian-Schell model source… (More)

- J D Gonglewski, D G Voelz, J S Fender, D C Dayton, B K Spielbusch, R E Pierson
- Applied optics
- 1990

We describe a postdetection turbulence compensation technique for obtaining high resolution imagery through the atmosphere. We present preliminary results fromfield experiments.

- Xifeng Xiao, David Voelz
- Optics express
- 2006

A numerical wave optics approach for simulating a partial spatially coherent beam is presented. The approach involves the application of a sequence of random phase screens to an initial beam field and the summation of the intensity results after propagation. The relationship between the screen parameters and the spatial coherence function for the beam is… (More)

- Deva K Borah, David G Voelz
- Applied optics
- 2007

The problem of estimating mechanical boresight and jitter performance of a laser pointing system in the presence of atmospheric turbulence is considered. A novel estimator based on maximizing an average probability density function (pdf) of the received signal is presented. The proposed estimator uses a Gaussian far-field mean irradiance profile, and the… (More)

- Xifeng Xiao, David Voelz
- Applied optics
- 2009

We examine the gamma-gamma and lognormal distributions as they apply to the irradiance at a point detector produced by partially coherent beams propagating horizontally through atmospheric turbulence. Our investigation compares the probability density functions and probability of fade predicted by the distributions with results from a wave-optics simulation… (More)