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06:48
A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
Pulsed Raman fiber laser and multispectral imaging in three dimensions
Joachim F Andersen1, Jens Busck, Henning Heiselberg
1Danish Defense Research Establishment, Ryvanges Allé 1, DK-2100 Copenhagen, Denmark.
Applied Optics
|August 8, 2006
Summary
This study uses Raman scattering and a green nanolaser to create multispectral light for high-accuracy 3D color imaging. This laser radar technique achieves submillimeter precision for distances up to 200 meters.
Area of Science:
- Optics and Photonics
- Laser Technology
- Materials Science
Background:
- Raman scattering in optical fibers offers a method for light generation.
- Nanolasers provide high pulse repetition rates for advanced imaging.
- Accurate distance measurement is crucial for 3D reconstruction.
Purpose of the Study:
- To generate multispectral light using Raman scattering in single-mode optical fibers.
- To demonstrate a high-accuracy 3D color imaging system using a green nanolaser and picosecond camera.
- To explore the potential of this laser radar technique for various applications.
Main Methods:
- Exploiting Raman scattering in a silicon (Si) fiber to generate multiple Stokes peaks from a green nanolaser.
- Utilizing a picosecond camera for time-of-flight measurements with 0.5 Mpixels per pulse.
- Constructing 3D images with submillimeter accuracy across the visible spectrum.
Main Results:
- Successful generation of multispectral light via Raman scattering.
- Demonstration of a laser radar technique enabling 3D color imaging with submillimeter accuracy.
- High-accuracy 3D imaging achieved at ranges up to approximately 200 meters.
- Data acquisition completed within a few seconds.
Conclusions:
- Raman scattering in optical fibers is an effective method for generating light for advanced imaging.
- The developed laser radar system offers high-accuracy, rapid 3D color imaging.
- Potential applications include optical tomography in scattering media like water and human tissue.
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