Optical coherence tomography using a photorefractive polymer composite

Paul Dean; Mark Russell Dickinson; David P. West

doi:10.1117/12.478994

8 July 2003 Optical coherence tomography using a photorefractive polymer composite

Paul Dean, Mark Russell Dickinson, David P. West

Proceedings Volume 4956, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VII; (2003) https://doi.org/10.1117/12.478994
Event: Biomedical Optics, 2003, San Jose, CA, United States

Abstract

We report on the possibility of using a photorefractive polymer composite device as a coherence gate for optical coherence tomography. Such a system could enable high-resolution 3-dimensional images of tissue samples to be holographically stored, and read out in real-time, or at a subsequent time. A free space system based on the Michelson interferometer is used to illuminate a photorefractive polymer device with two coherent beams. Interference of these beams results in an intensity distribution, which is consequently stored as a refractive index hologram inside the polymer. The image-carrying object beam is then reproduced from the first order diffraction of a probe beam through the device, and is captured on a CCD camera. Devices used are based on a poly(N-vinylcarbazole) (PVK):2,4,7-trinitro-9-fluorenone dimalenitrile (TNFDM) charge transport network with the electro-optic organic chromophore 1-(2'-ethylhexyloxy)-2,5-dimethyl-4-(4"-nitrophenylazo)benzene (EHDNPB). Using a 1% concentration of TNFDM, whole-field 2-dimensional image planes are successfully recorded in a few seconds with a 7mW HeNe laser at 633nm. Readout of the hologram is also performed using the same source.

Citation Download Citation

Paul Dean, Mark Russell Dickinson, and David P. West "Optical coherence tomography using a photorefractive polymer composite", Proc. SPIE 4956, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine VII, (8 July 2003); https://doi.org/10.1117/12.478994

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