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Phase retrieval using nonlinear diversity.

Chien-Hung Lu1, Christopher Barsi, Matthew O Williams

  • 1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.

Applied Optics
|April 3, 2013
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Summary
This summary is machine-generated.

Researchers adapted the Gerchberg-Saxton algorithm for phase retrieval in nonlinear optical systems. This noninterferometric technique successfully reconstructed phase objects using intensity measurements from a photorefractive crystal.

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Area of Science:

  • Nonlinear optics
  • Phase retrieval
  • Optical information processing

Background:

  • Phase retrieval is crucial for reconstructing optical wavefronts.
  • Traditional methods often require interferometric setups.
  • Nonlinear optical systems offer unique properties for phase manipulation.

Purpose of the Study:

  • To extend the Gerchberg-Saxton algorithm for phase retrieval in nonlinear systems.
  • To demonstrate a noninterferometric phase retrieval technique experimentally.
  • To reconstruct an unknown phase object using nonlinear optical measurements.

Main Methods:

  • Adaptation of the Gerchberg-Saxton algorithm for nonlinear propagation.
  • Utilization of a tunable photorefractive crystal as the nonlinear medium.
  • Acquisition of optical intensity measurements at varying nonlinear strengths.

Main Results:

  • Successful reconstruction of an unknown phase object.
  • Validation of the extended Gerchberg-Saxton algorithm in a nonlinear regime.
  • Demonstration of noninterferometric phase retrieval capability.

Conclusions:

  • The adapted Gerchberg-Saxton algorithm is effective for phase retrieval in nonlinear optical systems.
  • Nonlinear optical measurements can be used for noninterferometric phase reconstruction.
  • This technique offers a potential advancement in optical metrology and imaging.