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Related Experiment Video

Updated: Jun 17, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Enhanced 2D-image upconversion using solid-state lasers.

Christian Pedersen¹, Emir Karamehmedović, Jeppe Seidelin Dam

¹DTU Fotonik, Technical University of Denmark, DK-4000 Roskilde, Denmark. christian.pedersen@risoe.dk

|December 10, 2009

Summary

This summary is machine-generated.

Researchers developed a highly efficient upconversion method to convert full images to new wavelengths. This technique achieved 40% efficiency, enabling new possibilities for mid-infrared imaging detection.

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Area of Science:

Optics and Photonics
Nonlinear Optics
Laser Physics

Background:

Image conversion across the electromagnetic spectrum is challenging.
Existing detector technologies have limitations in certain wavelength regions, particularly mid-infrared.
Upconversion offers a potential solution for detecting otherwise inaccessible wavelengths.

Purpose of the Study:

To demonstrate a highly efficient method for full image upconversion.
To convert images from one spectral region to a desired new wavelength.
To explore applications in mid-infrared imaging and detection.

Main Methods:

Utilized enhanced upconversion principles.
Employed a metal transmission mask illuminated by a 765 nm Gaussian beam to create an image.
Focused the generated image within a nonlinear periodically poled potassium titanyl phosphate (PPKTP) crystal.
Integrated the crystal within the high intra-cavity field of a 1342 nm solid-state neodymium-doped yttrium orthovanadate (Nd:YVO4) laser.
Achieved image upconversion to 488 nm.

Main Results:

Demonstrated a highly efficient image upconversion method.
Experimentally achieved a 40% upconversion efficiency under continuous-wave (CW) conditions.
Successfully generated an upconverted image at 488 nm.

Conclusions:

The developed technique provides a highly efficient route for spectral image conversion.
The method shows promise for high-efficiency mid-infrared image upconversion.
This approach could overcome limitations of current detector technologies for mid-infrared detection.