Can somebody recommend a paper describing the use of the Nonlinear optics for hyperspectral imaging?

There are a lot of literature on the topic you are interested in (especially in relation to the field of medicine and biology). I will cite only a few. However, most of you will find in the References.

1. “Nonlinear Optical Imaging – Introduction and Pharmaceutical Applications”.

http://www.americanpharmaceuticalreview.com/Featured-Articles/148760-Nonlinear-Optical-Imaging-Introduction-and-Pharmaceutical-Applications/ (see references)

3. “Handbook of Biomedical Nonlinear Optical Microscopy”.

http://books.google.ru/books?id=rcrGlrguj1YC&pg=PP5&lpg=PP5&dq=nonlinear+optics+in+hyperspectral+imaging&source=bl&ots=mJOT12Z78Y&sig=bsuCMQKAHoIIi1CP7-T6r2tR3ks&hl=ru&sa=X&ei=hXl_VLPjM-SqywOC0IKoCw&ved=0CFsQ6AEwBw#v=onepage&q=nonlinear%20optics%20in%20hyperspectral%20imaging&f=false

4. “Encyclopedia of Optical Engineering”.

5. “Imaging with Nonlinear Optics.

Multi-photon microscopy offers less destructive imaging of living cells and functional mapping of integrated circuit chips”.

http://www.photonics.com/Article.aspx?AID=849

6. Infrared and Raman Spectroscopic Imaging

http://www.imaging-git.com/news/new-book-infrared-and-raman-spectroscopic-imaging

7. If you are interested in Nonlinear Hyperspectral imaging, for certain for you there will be useful a material stated in:

“Nonlinear Unmixing of Hyperspectral Images: Models and Algorithms”.

http://arxiv.org/pdf/1304.1875.pdf

I am interested in a problem which is connected with your question. It concerns a terahertz hyperspectral imaging. Source of terahertz radiation is terahertz QCL, manufactured by DFG technology (Difference Frequency Technology). In this case DFG process is a typical nonlinear process difference frequency generation. By the way, with a terahertz imaging In turn, terahertz and in general optical, the tomography is the typical example of nonlinear spectroscopy of high resolution connected with nonlinear optics.

Best regards, Leonid.

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