The double phase conjugate mirror is an oscillator

Philippe Delaye, Andrei A. Fotiadi, Gérald Roosen

Shimon Weiss, Shmuel Sternklar, Baruch Fischer

A. A. Zozulya

The double phase-conjugate mirror is an oscillator in the framework of the one-dimensional theoretical model previously used for its description. Results of a more consistent two-dimensional approach qualitatively differ from those of a one-dimensional analysis, indicating that the double phase-conjugate mirror is a convective amplifier. The correct physical picture of the scattering development is revealed, and the transverse profiles of scattered beams and the dynamics of nonlinear reflectivity are calculated.

M. C. Gower

A. A. Zozulya

Results of recent experimental and theoretical investigations on the role of fanning in the operation of several popular photorefractive self-pumped FWM geometries, including the double phase conjugate mirror (DPCM), the ring oscillator, the semilinear mirror, the system of two coupled DPCMs, and the total internal reflection (TIR) mirror, are presented. The results can be divided into two groups. Geometries of the first group (the DPCM and the ring oscillator) have soft excitation thresholds. Geometries of the second group (the semilinear mirror, the system of the two DPCMs and the TIR mirror) have hard excitation thresholds. Geometries of the first group experience a noticeable influence of fanning only when the level of fanning of a single pumping beam passing through a crystal, is high. Geometries of the second group, such as the semilinear mirror, the system of two DPCMs, and the TIR mirror without fanning, are not self-starting.>

Sze-Keung Kwong, Mark Cronin‐Golomb, Avigail Yariv

We review theories and experimental demonstrations of oscillation with photorefractive gain. The unidirectional ring resonator; the linear passive phase conjugate mirror, a phase conjugate resonator (the semilinear passive phase conjugate mirror), and the double phase conjugate resonator are treated, the applications in path-length-to-frequency converting interferometers and one-way wavefront converters are described.