Optical imaging through turbid media with a degenerate four-wave mixing correlation time gate
Abstract
Optical imaging through turbid media is demonstrated using a degenerate four-wave mixing correlation time gate. An apparatus and method for detecting ballistic and/or snake light while rejecting unwanted diffusive light for imaging structures within highly scattering media are described. Degenerate four-wave mixing (DFWM) of a doubled YAG laser in rhodamine 590 is used to provide an ultrafast correlation time gate to discriminate against light that has undergone multiple scattering and therefore has lost memory of the structures within the scattering medium. Images have been obtained of a test cross-hair pattern through highly turbid suspensions of whole milk in water that are opaque to the naked eye, which demonstrates the utility of DFWM for imaging through turbid media. Use of DFWM as an ultrafast time gate for the detection of ballistic and/or snake light in optical mammography is discussed.
- Inventors:
-
- Golden, CO
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- OSTI Identifier:
- 871466
- Patent Number(s):
- US 5738101
- Application Number:
- 08/588171
- Assignee:
- Regents of University of California (Los Alamos, NM)
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- optical; imaging; turbid; media; degenerate; four-wave; mixing; correlation; time; gate; demonstrated; apparatus; method; detecting; ballistic; snake; light; rejecting; unwanted; diffusive; structures; highly; scattering; described; dfwm; doubled; yag; laser; rhodamine; 590; provide; ultrafast; discriminate; undergone; multiple; lost; memory; medium; images; obtained; cross-hair; pattern; suspensions; milk; water; opaque; naked; eye; demonstrates; utility; detection; mammography; discussed; turbid media; yag laser; four-wave mixing; highly scattering; optical imaging; scattering medium; scattering media; time gate; mixing correlation; degenerate four-wave; correlation time; wave mixing; /600/356/
Citation Formats
Sappey, Andrew D. Optical imaging through turbid media with a degenerate four-wave mixing correlation time gate. United States: N. p., 1998.
Web.
Sappey, Andrew D. Optical imaging through turbid media with a degenerate four-wave mixing correlation time gate. United States.
Sappey, Andrew D. 1998.
"Optical imaging through turbid media with a degenerate four-wave mixing correlation time gate". United States. https://www.osti.gov/servlets/purl/871466.
@article{osti_871466,
title = {Optical imaging through turbid media with a degenerate four-wave mixing correlation time gate},
author = {Sappey, Andrew D},
abstractNote = {Optical imaging through turbid media is demonstrated using a degenerate four-wave mixing correlation time gate. An apparatus and method for detecting ballistic and/or snake light while rejecting unwanted diffusive light for imaging structures within highly scattering media are described. Degenerate four-wave mixing (DFWM) of a doubled YAG laser in rhodamine 590 is used to provide an ultrafast correlation time gate to discriminate against light that has undergone multiple scattering and therefore has lost memory of the structures within the scattering medium. Images have been obtained of a test cross-hair pattern through highly turbid suspensions of whole milk in water that are opaque to the naked eye, which demonstrates the utility of DFWM for imaging through turbid media. Use of DFWM as an ultrafast time gate for the detection of ballistic and/or snake light in optical mammography is discussed.},
doi = {},
url = {https://www.osti.gov/biblio/871466},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 14 00:00:00 EDT 1998},
month = {Tue Apr 14 00:00:00 EDT 1998}
}
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