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Related Concept Videos

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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Multiwavelength laser designed for single-frame digital holography.

Staffan Tjörnhammar, Finn Klemming Eklöf, Zhangwei Yu

    Applied Optics
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    Summary
    This summary is machine-generated.

    A new Ytterbium-fiber laser source enables precise digital holographic measurements. This multiwavelength laser achieved 3% accuracy in measuring a cylindrical object

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    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Holography

    Background:

    • Digital holography requires stable, multiwavelength light sources for accurate 3D measurements.
    • Fiber laser technology offers compact and efficient solutions for specialized optical applications.

    Purpose of the Study:

    • To develop a tailored multiwavelength Ytterbium-fiber laser source for spatially multiplexed digital holographic acquisitions.
    • To demonstrate the capability of this laser system for precise shape measurement of objects.

    Main Methods:

    • A multiwavelength Ytterbium-fiber laser operating in the 1.03 μm spectral region was designed and implemented.
    • Fiber Bragg gratings were used for precise spectral control, separating wavelengths by ~1 nm with bandwidths <0.1 nm.
    • Single-shot dual-wavelength digital holography was performed using a synthetic wavelength of 1.1 mm.

    Main Results:

    • The developed laser source successfully produced spectrally separated wavelengths suitable for digital holography.
    • The shape of a 48 mm diameter cylindrical object was measured with high accuracy.
    • The measurement accuracy was determined to be 3% of the synthetic wavelength.

    Conclusions:

    • The tailored multiwavelength Ytterbium-fiber laser is a viable tool for advanced digital holographic applications.
    • The system demonstrates potential for precise metrology and shape analysis in various scientific and industrial fields.
    • Further research can explore higher multiplexing capabilities and applications in complex object reconstruction.