Modeling of an acousto-optic laser beam steering system intended for satellite communication

Nikulin, Vladimir V.; Bouzoubaa, Mounir; Skormin, Victor A.; Busch, Timothy E.

doi:10.1117/1.1403022

Cited by 35 publications

(7 citation statements)

References 10 publications

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“…A typical configuration of an acousto-optic tracking system, such as the one shown in The dynamics of a Bragg cell is characterized by a first-order transfer function given by (3.5), which is also supported by the results of our step response experiments [6], [7].…”

Section: Bragg Cell Control Systemsupporting

confidence: 58%

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Hybrid Steering Systems for Free-Space Quantum Communication

Nikulin¹

2007

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. SPONSOR/MONITOR'S ACRONYM(S) 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)AFRL/IFB 26 Electronic Parkway Rome NY 13441-4514 SPONSORING/MONITORING AGENCY REPORT NUMBER AFRL-IF-RS-TR-2007-53 DISTRIBUTION AVAILABILITY STATEMENT APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED. PA# 07-072 SUPPLEMENTARY NOTES ABSTRACTThe proposed research will utilize a mechanical gimbal for extended range of optical connectivity, and a fast beam deflector to create a hybrid beam steering system capable of exercising a very high positioning bandwidth over a full hemisphere of steering angles. System design process will include the solution of such underlying problems as the development of the mechanical and optical subsystems, mathematical description of the hybrid device, optimal task distribution between the mechanical and non-mechanical positioning components, and coordination of the operation of the "coarse" and "fine" system controllers. This work will hybrid two separate technologies using the advantages of each. SUBJECT TERMSQuantum communication, mechanical gimbal, optical connectivity, hybrid beam steering SECURITY

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Section: Bragg Cell Control Systemsupporting

confidence: 58%

“…Since the deflection angle does not experience any overshoot [6], dynamics of this process can be best described by a first order system (lag filter). As a result, the model of the Bragg cell can be established in the form of the following transfer function [7] …”

Section: Acousto-optic Deflectionmentioning

confidence: 99%

Hybrid Steering Systems for Free-Space Quantum Communication

Nikulin¹

2007

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“…(2). For the concentration of MB in H 2 O used in these experiments, the Debye length was calculated to be 6.51 · 10 −10 m, and the expected electrolytic capacitance per unit area was estimated to be 1.09 F∕m 2 .…”

Section: Resultsmentioning

confidence: 97%

“…A limitation of communicating via light or infrared radiation is the difficulty in the angular redirection that is required in fiber-optic networks in order to switch optical signals from one fiber to another and for wavelength-division multiplexing and demultiplexing [1]. Light beam steering is also used in free space communications where the directions of the transmitter and receivers are not fixed [2], industrial laser drilling or cutting, and in holographic data storage [3]. Applications that require the light to be redirected by angles of more than a few degrees typically require moving parts such as micromirror arrays [4], but such devices are cumbersome and expensive.…”

Section: Introductionmentioning

confidence: 99%

Electrically controlled diffraction employing electrophoresis, supercapacitance, and total internal reflection

Radel

Whitehead

2013

Appl. Opt.

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The reflectance of a surface can be altered by controlling the concentration of dye ions in a region adjacent to an optically transparent and electrically conductive thin film. We present a method for nonmechanical light deflection achieved by altering the reflectance of a diffraction grating, an approach that creates new diffraction peaks that lie between those associated with the original grating spacing. We have demonstrated this effect by applying an electrical potential difference between interdigitated indium-tin oxide (ITO) electrodes and measuring the intensity of one of the new diffraction peaks. The measured diffraction peak intensities were found to reversibly deflect approximately 7% of the reflected light to previously nonexistent peaks. The diffraction grating was formed by patterning a thin film of planar, untreated ITO on a glass substrate using standard photolithography techniques. The size scale for this method of electrically controlled diffraction is limited only by the lithographic process; thus there is potential for the grating to deflect light to angles greater than those achievable using other methods. This approach could be used in applications such as telecommunications, where large deflection angles are required, or other applications where alternate beam-steering methods are cost prohibitive.

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“…When an ultrasonic wave propagates through the crystal material, different regions of expansion and compression are created inside the Bragg cell, causing changes in density. The index of refraction is periodically modulated, and the medium becomes equivalent to a moving grating, which can be described by the following equation 13 x k t n t x n s s sin , (1) where x is position in the Bragg cell along the vertical axis; s is the sound angular frequency and is the sound wave vector given by…”

Section: Brief Review Of Acousto-optic Deflectionmentioning

confidence: 99%

Dynamic 3D profilometry with dual-acousto-optic fringe projection

et al. 2005

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A three-dimensional (3D) profilometry based on a dual-acousto-optic fringe projection is reported in this paper. The fringe projector is able to generate fringe patterns with different optical sensitivities and therefore can handle the object surface with complex geometry and topology. It is also qualified for video-rate 3-D profilometry of arbitrary shape objects. By using two acousto-optic deflectors (AODs), the projector can generate a time-series, frequency-varying fringe patterns by use of the AO interaction effect. The two AODs are driven by the radio frequency (RF) signal with the same frequency. Changing the RF frequency leads to the change of the period of fringe patterns and, therefore, different sensitivities. In practice, the changing rate of sesitivity is limited by the frame rate of the detector, e.g. CCD, so it makes a dynamic 3-D profilometry possible. Experimentally, we project a sequence of spatial frequency-varying fringe patterns onto the test object surface. Then, a CCD camera simultaneously acquires the phase-modulated fringe patterns accordingly. With a sequence of phase measurement in a progression of fringe periods, an enhanced scheme for phase unwrapping algorithm is implemented in a recursive manner. The object surface with complex geometry and topology can be reconstructed in this way. Experimental results are also given to validate this approach.

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Modeling of an acousto-optic laser beam steering system intended for satellite communication

Cited by 35 publications

References 10 publications

Hybrid Steering Systems for Free-Space Quantum Communication

Hybrid Steering Systems for Free-Space Quantum Communication

Electrically controlled diffraction employing electrophoresis, supercapacitance, and total internal reflection

Dynamic 3D profilometry with dual-acousto-optic fringe projection

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