Spectrum-enhanced correlator by two-wave mixing in a photorefractive crystal

Takeshi Takahashi; Yukihiro Ishii

doi:10.1117/12.347791

7 May 1999 Spectrum-enhanced correlator by two-wave mixing in a photorefractive crystal

Takeshi Takahashi, Yukihiro Ishii

Author Affiliations +

Proceedings Volume 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99); (1999) https://doi.org/10.1117/12.347791
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '99), 1999, Yokohama, Japan

Abstract

A real-time spectrum-enhanced correlator has been constructed to improve the correlation performance. The system in a photorefractive BaTiO₃ two-wave mixing plays a role to enhance the optical spectrum of an input object at a Fourier domain by changing the pump beam intensity. Coherent enhancement together with a phase-only filter can be achieved a good correlation performance. The character-recognition experiments with the system are shown.

Citation Download Citation

Takeshi Takahashi and Yukihiro Ishii "Spectrum-enhanced correlator by two-wave mixing in a photorefractive crystal", Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); https://doi.org/10.1117/12.347791

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