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Double phase-conjugate mirror: analysis, demonstration, and applications.

S Weiss, S Sternklar, B Fischer

|September 10, 2009

Summary

We demonstrate a double phase-conjugate mirror (DPCM) using barium titanate. This device simultaneously reproduces two different input images, enabling applications in optical processing and sensing.

Area of Science:

Nonlinear optics
Photorefractive materials
Optical resonators

Background:

The double phase-conjugate mirror (DPCM) is a nonlinear optical device.
Previous DPCM implementations required external surfaces or specific crystal geometries.
Simultaneous phase-conjugate imaging of multiple inputs was challenging.

Purpose of the Study:

To report the operation of a novel DPCM configuration.
To analyze the theoretical underpinnings of the DPCM.
To explore potential applications of the DPCM.

Main Methods:

Utilizing a barium titanate crystal as the photorefractive medium.
Employing two mutually incoherent input beams directed to opposite sides of the crystal.
Analyzing the four-wave mixing process and self-refraction within the crystal.

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Main Results:

Simultaneous phase-conjugate reproduction of two distinct input images was achieved.
The DPCM operated without external or internal crystal surface modifications.
Theoretical analysis confirmed the operational principles.

Conclusions:

The DPCM offers a robust method for simultaneous image reconstruction.
Potential applications include image processing, interferometry, and rotation sensing.
The DPCM can be integrated into optical resonators and ring lasers.