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Theory for upconversion of incoherent images
Jeppe Seidelin Dam1, Christian Pedersen, Peter Tidemand-Lichtenberg
1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Roskilde, Denmark. jdam@fotonik.dtu.dk
Optics Express
|January 26, 2012
Summary
Image spectral upconversion theory is presented for incoherent light, showing superior spatial resolution compared to coherent light upconversion. Experiments validate the comprehensive theory, including TEM(nm) modes.
Area of Science:
- Optics and Photonics
- Image Processing
Background:
- Image upconversion shifts spectral content.
- Understanding upconversion of incoherent light is crucial for advanced imaging.
Purpose of the Study:
- To present a comprehensive theory for upconversion of incoherent light images.
- To compare theoretical predictions with experimental results.
- To investigate fundamental differences between coherent and incoherent image upconversion.
Main Methods:
- Development of a comprehensive theoretical framework for spectral upconversion.
- Experimental validation of the proposed theory.
- Analysis of upconversion using Transverse Electric and Magnetic (TEM(nm)) modes.
Main Results:
- Demonstrated superior spatial resolution for incoherent light image upconversion compared to coherent methods.
- Experimental results align with the developed theoretical predictions.
- Detailed investigation into the fundamental differences in upconversion processes.
Conclusions:
- The presented theory accurately describes incoherent light image upconversion.
- Incoherent light upconversion offers enhanced spatial resolution, a key advantage for imaging applications.
- The study provides a foundational understanding for optimizing spectral upconversion techniques.
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