Fourier-basis structured illumination imaging with an array of integrated optical phased arrays
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- Nathan Dostart
- University of Colorado Boulder
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- Bohan Zhang
- Boston University
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- Michael Brand
- University of Colorado Boulder
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- Daniel Feldkhun
- University of Colorado Boulder
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- Miloš Popović
- Boston University
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- Kelvin Wagner
- University of Colorado Boulder
Abstract
<jats:p>Active imaging and structured illumination originated in “bulk” optical systems: free-space beams controlled with lenses, spatial light modulators, gratings, and mirrors to structure the optical diffraction and direct the beams onto the target. Recently, optical phased arrays have been developed with the goal of replacing traditional bulk active imaging systems with integrated optical systems. In this paper, we demonstrate the first array of optical phased arrays forming a composite aperture. This composite aperture is used to implement a Fourier-based structured-illumination imaging system, where moving fringe patterns are projected on a target and a single integrating detector is used to reconstruct the spatial structure of the target from the time variation of the back-scattered light. We experimentally demonstrate proof-of-concept Fourier-basis imaging in 1D using a six-element array of optical phased arrays, which interfere pairwise to sample up to 11 different spatial Fourier components, and reconstruct a 1D delta-function target. This concept addresses a key complexity constraint in scaling up integrated photonic apertures by requiring only<jats:inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi></mml:math></jats:inline-formula>elements in a sparse array to produce an image with<jats:inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow class="MJX-TeXAtom-ORD"><mml:msup><mml:mi>N</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math></jats:inline-formula>resolvable spots.</jats:p>
Journal
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- Journal of the Optical Society of America A
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Journal of the Optical Society of America A 38 (10), B19-, 2021-08-20
Optica Publishing Group
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Details 詳細情報について
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- CRID
- 1360576121885517184
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- ISSN
- 15208532
- 10847529
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- Data Source
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- Crossref