Journal
NATURE PHOTONICS
Volume 6, Issue 6, Pages 355-359Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2012.90
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Funding
- National Science Foundation [ECCS-1128542, ECCS-1068642]
- Yale Child Health Research Center [5K12-HD001401-12]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1068642] Funding Source: National Science Foundation
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1128542] Funding Source: National Science Foundation
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Many imaging applications require increasingly bright illumination sources, motivating the replacement of conventional thermal light sources with bright light-emitting diodes, superluminescent diodes and lasers. Despite their brightness, lasers and superluminescent diodes are poorly suited for full-field imaging applications because their high spatial coherence leads to coherent artefacts such as speckle that corrupt image formation(1,2). We recently demonstrated that random lasers can be engineered to provide low spatial coherence(3). Here, we exploit the low spatial coherence of specifically designed random lasers to demonstrate speckle-free full-field imaging in the setting of intense optical scattering. We quantitatively show that images generated with random laser illumination exhibit superior quality than images generated with spatially coherent illumination. By providing intense laser illumination without the drawback of coherent artefacts, random lasers are well suited for a host of full-field imaging applications from full-field microscopy(4) to digital light projector systems(5).
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