Lockheed Martin Corporation

Anthony Cecere Klee

Guy Chriqui

Samuel Trent Thurman

Thomas Gustav Alley

Micah Boyd

Nicolas James Deshler

Jacob Harris Wirth

Localized measurement of turbulent airflows is provided using enhanced techniques of digital holography with computed tomography. In an implementation, an optical beam is diffracted to produce an array of signal beams which propagate at different angles through a test volume that includes a test article. A reference beam is optically interfered with the array of signal beams after propagating through the test volume, producing a corresponding array of holograms simultaneously detected by a single digital holographic sensor. Digitized versions of the holograms are processed to produce a signal field for each test beam. Computed tomography is then applied to the signal fields to determine path-resolved turbulence measurements.

Digital holographic tomography turbulence measurements

An optical aperture system is provided that includes a photonic integrated circuit. The photonic integrated circuit includes a plurality of apertures, a plurality of optical phase shifters coupled to respective apertures of the plurality of apertures, an optical splitter-combiner coupled to the plurality of optical phase shifters, an optical switch coupled to the optical splitter-combiner, a light source coupled to the optical switch, and a photodetector coupled to the optical switch. The optical aperture system further includes a controller configured to execute a first set of instructions to control the plurality of optical phase shifters and the light source in accordance with a first operating mode of a plurality of operating modes of the optical aperture system, and a processor configured to execute a second set of instructions to process an output of the photodetector in accordance with the first operating mode of the optical aperture system.

N-arm interferometric photonic integrated circuit based software defined optical aperture system

A scalable interferometric imaging and laser communications system integrated as a single satellite payload is provided. Multiple lenslets are coupled via associated waveguides to a single multi-mode interferometer in an N-arm beam combination using a PIC based architecture. The multi-mode interferometer is coupled to a communication sensor via a splitter and to an imaging sensor via an array waveguide grating, which in turn are coupled to a processor. The system interferes all input waveguides simultaneously and provides OPD control over individual input waveguides.

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Boulder, CO, United States of America

Anthony Cecere Klee