&lt;title&gt;Application of dynamic gratings to broad spectral band beam steering&lt;/title&gt;

Watson, Edward; McManamon, Paul; Barnes, Lawrence J.; Carney, Alan J.

doi:10.1117/12.177688

Cited by 11 publications

(3 citation statements)

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“…We can see this by analyzing the diffraction pattern resulting from an optical phased array. 13 As shown in the reference, the blaze profile determines the efficiency of steering into each of the grating orders. For a linear phase blaze profile given by…”

Section: Wavefront Controlmentioning

confidence: 99%

Conformal apertures: concepts and requirements

Watson

2011

SPIE Proceedings

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Architectures for a conformal electro-optical aperture that is based on a collection of subapertures are considered. Such architectures have different requirements for passive and active systems. In this paper we consider requirements for active systems. In particular we consider concepts for measuring the scattered illumination field at the subaperture. We discuss requirements on the subapertures, such as phasing and steering.

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Section: Wavefront Controlmentioning

confidence: 99%

Conformal apertures: concepts and requirements

Watson

2011

SPIE Proceedings

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“…We started trying to steer broadband sensors in the late 80's to early 90's not long after we started the efforts to steer narrow band light non-mechanically. 35,36,37,38,39 One of the early useful insights was that larger resets will be somewhat more broadband, even though it was not proven in a paper until 2005. Reference 40 shows in theory and experiment the effect of larger resets on the broadband nature of the beam steerer.…”

Section: Non-mechanical Steering Of Broadband Eo Beamsmentioning

confidence: 99%

Progress and opportunities in optical beam steering

McManamon¹,

Ataei²

2019

Quantum Sensing and Nano Electronics and Photonics XVI

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Non-mechanical beam steering for optical systems has been important for decades, but with the dramatic increase in commercial applications, such as the driverless car, it is becoming even more important. In this paper, three decades of progress in optical beam steering is discussed, along with a comparison of approaches being developed. Non-mechanical optical beam steering is compared against mechanical steering approaches. Unique space fed beam steering approaches are discussed using different active electro optical media. Some electro optical beam steering systems are explained in detail and some methods to improve the efficiency are presented. 1. Summary of Existing Mechanical Beam Steering Systems Mechanical approaches are being used now for most applications, so non-mechanical approaches will need to displace existing mechanical approaches in various applications. The main mechanical beam steering approaches are; Gimbals, fast steering mirrors (FSMs), Risley prisms, rotating polygons, and two micro-mechanical approaches, lenslet arrays and MEMs.

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“…Beams Trying to steer broadband sensors was first pursued in the late 1980s to early 1990s, not long after starting the efforts to steer narrowband light nonmechanically. 6,[81][82][83][84] One of the early useful insights was that larger resets are somewhat more broadband, even though it was not proven in a paper until 2005. Reference 7 shows in theory and experiment the effect of larger resets on the broadband nature of the beam steerer.…”

Section: Nonmechanical Steering Of Broadband Eomentioning

confidence: 99%

Progress and opportunities in the development of nonmechanical beam steering for electro-optical systems

McManamon¹,

Ataei²

2019

Opt. Eng.

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We discuss over three decades of progress in nonmechanical beam steering, provide a comparison of approaches being developed, and comment on promising approaches not yet fully developed. Most of the work in nonmechanical beam steering has been for narrowband optical systems, but a brief discussion is provided of broadband. The majority of the nonmechanical approaches to beam steering create a tilted optical path delay (OPD) to change the wavefront, but some directly create a phase delay. OPD-based approaches may be true time delay, with no resets or modulo 2πn optical phased arrays that have resets. Most of the nonmechanical optical beam steering approaches tilt an existing wavefront and are called space fed approaches, because the beam is already formed when the wavefront is tilted. For the majority of radar nonmechanical beam steering, the tilted wavefront is formed by individual transmit/receive modules. Periodic structures (gratings) spread different wavelengths of light in angle, thus steering light, and are also used for nonmechanical steering. Our paper is derived from a conference paper presented at Photonics West in February 2019.

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<title>Application of dynamic gratings to broad spectral band beam steering</title>

Cited by 11 publications

References 0 publications

Conformal apertures: concepts and requirements

Conformal apertures: concepts and requirements

Progress and opportunities in optical beam steering

Progress and opportunities in the development of nonmechanical beam steering for electro-optical systems

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