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Electronic Optical Phase Modulation

Technology Benefits

ΓÇóFunctions through turbid matterΓÇóReal-time conjugation of complex mediaΓÇóHigher Efficiency

Technology Application

ΓÇóLaser medicineΓÇóOptical defenseΓÇóImagingΓÇóCommunications

Detailed Technology Description

This process combines electronic and optical phase conjugation. Typically there is an efficiency limitation due to phase conjugation relying on nonlinear optical processes. However, this is resolved by introducing electronic phase conjugation (E-OPC) as a complementary method. OPC defines a special relationship between two coherent optical beams propagating in opposite directions with reversed wavefronts and identical transverse amplitude distributions. The two-step process of E-OPC begins by measuring the wavefront of the signal wave (fluorescence) using a reference beam and charge-coupled device (CCD) arrays so that both quadratures of the wavefront are measured. The measured wavefront is then conjugated in the electrical domain and applied to a spatial modulator array that generates the phase modulated beam to back propagate to the sample. E-OPC removes the wavelength and efficiency limitation as CCDΓÇÖs respond over a broad spectrum, and provides the unique ability to remove aberrations due to a turbid medium.

Supplementary Information

Patent Number: US20120232535A1
Application Number: US13417822A
Inventor: Li, Guifang | Saleh, Bahaa
Priority Date: 11 Mar 2011
Priority Number: US20120232535A1
Application Date: 12 Mar 2012
Publication Date: 13 Sep 2012
IPC Current: A61B001820 | G01B0009021 | G03H000126
US Class: 606004 | 356457 | 359022
Assignee Applicant: University of Central Florida Research Foundation Inc.lando
Title: Systems And Methods For Performing Digital Holography
Usefulness: Systems And Methods For Performing Digital Holography
Summary: System for performing single-shot display holography for propagating light back to cell in biological tissue, and tracking moving target object.
Novelty: System for performing single-shot display holography for propagating light in biological tissue, receives outputs of optical hybrid assembly and simultaneously measures in-phase and quadrature components of incoming light wavefront

Industry

Disease Diagnostic/Treatment

Sub Category

Cancer/Tumor

*Abstract

Until now, purely optical techniques have been used to realize OPC, however, this classical approach is limited by its inability to quickly and precisely adapt the phase conjugation. Using electronic optical phase modulation, optical transmission through complex media such as biological tissue, traditionally limited by multiple light scattering, can now be realized. In laser medicine, this technique can fluorescently label a cell (e.g. cancer cell) and use the advantages of OPC to selectively interact with these cells without effect to surrounding tissues. These actions can be thermal, mechanical or chemical, all mediated by the back propagated optical beam. This process can also be applied to defense applications where the light/electromagnetic waves come from objects of interest. Using this method, it is possible to use OPC to illuminate/interfere/ or destroy the object that was illuminated.

*Principal Investigator

Name: Dr. Guifang Li

Department:

Name: Dr. Bahaa Saleh

Department:

Country/Region

USA