Wave-front reconstruction with a Fourier hologram in a phase-conjugating mirror oscillator
Résumé
A laser profile consisting of 113 coupled Gaussian waves is obtained in a cw oscillator by use of a BaTiO3 crystal as both an amplifying medium and a phase-conjugating mirror. Mutual locking of Gaussian waves is performed by a pair of spatial filters. One of them is a high-resolution holographic component; the other is an opaque screen with identical circular apertures.