Conference paper
Limitations to emission spot size in laser lighting
Diode Lasers and LED Systems, Department of Photonics Engineering, Technical University of Denmark1
Department of Photonics Engineering, Technical University of Denmark2
Department of Health Technology, Technical University of Denmark3
Biomedical Engineering, Department of Health Technology, Technical University of Denmark4
Biophotonic Imaging, Nano and Bio-physical Systems, Department of Health Technology, Technical University of Denmark5
Henan Polytechnic University6
Laser lighting is an emerging technology to generate high luminance lighting. To achieve high luminance or high luminous exitance, the light emitter must have high flux and small size simultaneously. When laser light is focused to a small spot size on the phosphor material, the two main limitations are saturation of the phosphor material and the spot size of the generated light.
Here, we investigate experimentally and numerically the spot size of laser lighting dependent on the spot size of the incident laser light and the material properties of the wavelength converting phosphor material. We find numerically that the spot size of the generated white light is significantly influenced by the phosphor properties.
The spot size of the white light determines the étendue and thereby the possibility to collect and shape the light. This has important implications in applications of laser lighting.
Language: | English |
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Publisher: | SPIE - International Society for Optical Engineering |
Year: | 2020 |
Pages: | 113020B-113020B-7 |
Proceedings: | SPIE OPTO 2020 |
Series: | Proceedings of Spie - the International Society for Optical Engineering |
ISBN: | 1510633677 , 1510633685 , 9781510633674 and 9781510633681 |
ISSN: | 1996756x and 0277786x |
Types: | Conference paper |
DOI: | 10.1117/12.2542674 |
ORCIDs: | Jensen, Ole Bjarlin , Hansen, Anders Kragh , Thorseth, Anders , Marti, Dominik and Petersen, Paul Michael |