Electrically controlled reconfigurable apertures for free space optical communications

Sokhoyan, Ruzan; Grajower, Meir Y.; Sisler, Jared; Shayegan, Komron; Thureja, Prachi; Atwater, Harry A.

doi:10.1117/12.2610570

Cited by 4 publications

(2 citation statements)

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“…Non-mechanical concepts are equally not new, they have been extensively studied and applied in microscopy, LiDAR and optical coherent tomography systems as they do not have any moving component [3]. Unsurprisingly, they are still sparsely used today in free-space optical communication (FSO) systems because the state-of-the-art of solid-state beam steerers are still characterized by low optical power (typically few milliwatts) [4], making them challenging for long-range usage with baseline link margin. This research seeks to address this issue by developing a higher power, non-mechanical OBS device suitable for use in a realistic lasercom FPS.…”

Section: Overview Of Mechanical Steering Devicesmentioning

confidence: 99%

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Ishola¹,

Kolev²,

Kunimori³

et al. 2023

Free-Space Laser Communications XXXV

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We present concept design of an innovative, compact, non-mechanical optical beam steering antenna with an experimental liquid crystal beam shaper optimized for lean platforms. Laser communication terminals in air and space-borne platforms must fulfil the low-SWaP (size, weight, and power) design philosophy which is often a challenging task when utilizing mechanical steerers like prisms, MEMS fast steering mirrors, lenslet arrays, gimbal movers etc. We introduce the approach of a compact photonics integrated circuit consisting of power division network, optical phase array antennas and liquid crystal on silicon structure to form a laser transmitting module for a CubeSat. An Erbium Doped Fiber Amplifier provide adequate optical power output that can facilitate a baseline free-space communication link margin at 1550nm. The design parameters were tuned to achieve to minimal divergence and adequate beam steering angle, higher EIRP, high beam switching speed and tolerance of space environmental conditions. Applications are numerous and not limited to optical communication terminals on drones, aircrafts, and satellites; automotive LiDAR systems, medical and scientific instrumentation devices are also promising areas of rapid adoption and integration.

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Section: Overview Of Mechanical Steering Devicesmentioning

confidence: 99%

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Ishola¹,

Kolev²,

Kunimori³

et al. 2023

Free-Space Laser Communications XXXV

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“…One major obstacle on the performance of metasurfaces based on ITO is the material strong power absorption that typically limits their power efficiency to < 1%. A recent study has shown that a significant amount of the incident power (≈ 70%) is absorbed at the ENZ regime [18]. InAs and CdO are introduced as alternative materials that feature superior optical properties in terms of dissipative loss in comparison to ITO with for designing active metasurfaces to operate at mid-IR regime, while maintaining the ENZ phenomenon and large variation of the complex refractive index.…”

Section: Active Materials: Designing Dynamically Tunable Metasurfacesmentioning

confidence: 99%

Theory and design of spatiotemporal metasurfaces for comprehensive control of light

Sabri Khiavi

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I thank my father, Ahmad, for motivating me and being my source of hope and courage during challenging moments. I am thankful to my mother, Zeinab, for her boundless love, sacrifices, and compassion. I also thank my sisters, Samira and Laaya, for inspiring me to preserve and strive for excellence, and providing joyful moments over all these years. I am extremely fortunate to have such a caring family and their presence in my life is a source of endless comfort. Their crucial support, unconditional love, and encouragement have been indispensable to me. They always have supported me during both good times and challenging moments, and they have helped me to turn the challenges into opportunities.

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Toward a universal metasurface for optical imaging, communication, and computation

et al. 2022

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In recent years, active metasurfaces have emerged as a reconfigurable nanophotonic platform for the manipulation of light. Here, application of an external stimulus to resonant subwavelength scatterers enables dynamic control over the wavefront of reflected or transmitted light. In principle, active metasurfaces are capable of controlling key characteristic properties of an electromagnetic wave, such as its amplitude, phase, polarization, spectrum, and momentum. A ‘universal’ active metasurface should be able to provide independent and continuous control over all characteristic properties of light for deterministic wavefront shaping. In this article, we discuss strategies for the realization of this goal. Specifically, we describe approaches for high performance active metasurfaces, examine pathways for achieving two-dimensional control architectures, and discuss operating configurations for optical imaging, communication, and computation applications based on a universal active metasurface.

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Electrically controlled reconfigurable apertures for free space optical communications

Cited by 4 publications

References 0 publications

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Conceptual design and analysis of a compact liquid crystal on silicon non-mechanical optical beam steering antenna for lean platforms

Theory and design of spatiotemporal metasurfaces for comprehensive control of light

Toward a universal metasurface for optical imaging, communication, and computation

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