Real-time two-dimensional imaging in scattering media by use of a femtosecond Cr4+: forsterite laser

An original femtosecond Cr4+:forsterite laser source associated with a nonlinear optical correlator was used for imaging through scattering media with 1220-nm light. The system, which operates as an ultrafast optical gate by sum-frequency generation in a nonlinear crystal, was able to detect the lig...

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Bibliographic Details
Published in:Optics letters 2000-06, Vol.25 (12), p.929-931
Main Authors: Abraham, Emmanuel, Bordenave, E., Tsurumachi, N., Jonusauskas, Gediminas, Oberle, J., Rulliere, C., Mito, A.
Format: Article
Language:English
Subjects:
Optics
Physics
Online Access:Get full text
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Summary:An original femtosecond Cr4+:forsterite laser source associated with a nonlinear optical correlator was used for imaging through scattering media with 1220-nm light. The system, which operates as an ultrafast optical gate by sum-frequency generation in a nonlinear crystal, was able to detect the light reflected from a resolution chart hidden in a turbid medium, at an attenuation of as much as 15 mean free paths. When the object was illuminated with a collimated beam, real-time two-dimensional images were obtained, with a maximum transverse resolution of ∼20 µm.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.25.000929