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Related Experiment Video

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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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Monostatic all-fiber scanning LADAR system.

Jeffrey H Leach, Stephen R Chinn, Lew Goldberg

    Applied Optics
    |February 3, 2016
    PubMed
    Summary

    A new compact scanning LADAR system uses a novel fiber cantilever design for efficient beam steering. This monostatic system offers inherent alignment and improved performance over conventional scanners.

    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Sensing Systems

    Background:

    • Conventional scanning LADAR systems often face challenges with alignment, size, and power consumption.
    • Bi-static configurations with polygon, galvo, or Risley-prism scanners can be complex and bulky.

    Purpose of the Study:

    • To develop a compact, efficient, and robust scanning LADAR system.
    • To leverage a monostatic, fiber-coupled configuration for improved performance.

    Main Methods:

    • A fiber-coupled, monostatic LADAR system was designed using a piezo-electric actuator to vibrate a fiber cantilever tip.
    • The system utilizes the same aperture for transmitting (TX) and receiving (RX) optical beams.
    • A position-sensing detector (PSD) in two-photon absorption mode detected 1.5 μm pulses, sensing fiber tip position.

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    Main Results:

    • The system achieved a scanning rate of 50,000 points per second with a 6° scan angle.
    • A range precision of 4.7 mm was demonstrated, with a maximum operational range of 26 m.
    • The monostatic design ensured inherent optical alignment, eliminating parallax issues.

    Conclusions:

    • The developed compact scanning LADAR system offers significant advantages in size, weight, power efficiency, and alignment.
    • This novel approach provides a promising alternative to conventional LADAR scanning mechanisms.