| Title: |
Focusing large spectral bandwidths through scattering media |
| Authors: |
Vesga, Arturo G.; Hofer, Matthias; Balla, Naveen Kumar; De Aguiar, Hilton B.; Guillon, Marc; Brasselet, Sophie |
| Publication Year: |
2019 |
| Collection: |
Physics (Other) |
| Subject Terms: |
Physics - Optics |
| Description: |
Wavefront shaping is a powerful method to refocus light through a scattering medium. Its application to large spectral bandwidths or multiple wavelengths refocusing for nonlinear bio-imaging in-depth is however limited by spectral decorrelations. In this work, we demonstrate ways to access a large spectral memory of a refocus in thin scattering media and thick forward-scattering biological tissues. First, we show that the accessible spectral bandwidth through a scattering medium involves an axial spatio-spectral coupling, which can be minimized when working in a confocal geometry. Second, we show that this bandwidth can be further enlarged when working in a broadband excitation regime. These results open important prospects for multispectral nonlinear imaging through scattering media. |
| Document Type: |
Working Paper |
| DOI: |
10.1364/OE.27.028384 |
| Access URL: |
http://arxiv.org/abs/1908.01243 |
| Accession Number: |
edsarx.1908.01243 |
| Database: |
arXiv |