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- W2015890495 abstract "Free-space laser communications requires extremely accurate tracking to keep the transmitter and receiver well aligned in order to prevent data errors. This paper describes a demonstration of diffraction limited tracking for free-space laser communications. Diffraction limited tracking requires the laser beam be held to its undisturbed location to within a fraction of the angular resolution of the system. The demonstration consists of a transmitter, receiver, and far-field simulator. The far-field simulator is used to simulate the laser beam traversing a large distance in space and to introduce a disturbance representative of the spacecraft base motion effects. TRW has developed a biaxial mirror articulator for tracking out this disturbance. This fine and medium track mechanism (F/MTM) consists of a flexurally-suspended gimbal assembly, four voice coils, a caging mechanism, on-board signal conditioning circuit, and outboard electronics. A fine track detector (FTD) consisting of a quadrant photodetector and fine track processing electronics (FTPE) provides feedback to the F/MTM. This paper discusses the major components of the demonstration in detail. In addition, data on the performance of the tracking system is presented and discussed." @default.
- W2015890495 created "2016-06-24" @default.
- W2015890495 creator A5082552861 @default.
- W2015890495 date "1988-05-02" @default.
- W2015890495 modified "2023-09-23" @default.
- W2015890495 title "Diffraction-Limited Tracking For Space Communication" @default.
- W2015890495 doi "https://doi.org/10.1117/12.976564" @default.
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