Wave-front reconstruction with a Fourier hologram in a phase-conjugating mirror oscillator.
A laser profile consisting of 113 coupled Gaussian waves is obtained in a cw oscillator by use of a BaTiO(3) crystal as both an amplifying medium and a phase-conjugating mirror. Mutual locking of Gaussian waves is performed by a pair of spatial f ilters. One of them is a high-resolution holographic component; the other is an opaque screen with identical circular apertures.
A
A
Desfarges
V
V
Kermène
B
B
Colombeau
M
M
Vampouille
C
C
Froehly