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- W2920683675 abstract "Optical frequency-modulated continuous-wave (FMCW) interferometry using a swept laser source allows for highly precise distance measurements. The FMCW technique has the distinct capability to perform both diffuse surface and sub-surface ranging with micron-level accuracy over meters of depth. Similar to swept-source optical coherence tomography, this technique can also produce detailed images of internal structures over large volumes. Recent advances such as active sweep linearization and laser phase-noise suppression techniques have greatly improved the ranging depth and accuracy, allowing for high-resolution 3D imaging of complex objects. Understanding how these techniques can affect the FMCW signal is key in determining system performance limits. The application of an opto-electronic phaselocked loop (OPLL) can greatly reduce both the laser phase noise and deterministic sweep errors. The OPLL uses optical feedback to suppress sweep nonlinearities while also controlling drifts that can be extremely detrimental to the accuracy of the interferometric beat signal. In this work, an analysis of various error sources encountered in activelylinearized FMCW ranging systems is presented." @default.
- W2920683675 created "2019-03-11" @default.
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- W2920683675 date "2019-03-04" @default.
- W2920683675 modified "2023-09-26" @default.
- W2920683675 title "Performance analysis of linearly-swept frequency-modulated continuous-wave ladar" @default.
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- W2920683675 doi "https://doi.org/10.1117/12.2511546" @default.
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