Pp. Pashinin et al., SPATIAL STRUCTURE OF THE FUNDAMENTAL MODE OF A LOOP CAVITY WITH GAIN-GRATING HOLOGRAMS, Quantum electronics, 28(8), 1998, pp. 707-709
An analysis is made of an increase in the radiation divergence in a se
lf-starting laser system with four-wave mirrors based on saturated-gai
n gratings in the active medium of an Nd:YAlO3 laser. The experimental
results obtained lead to the conclusion that in such systems with a l
oop cavity the full phase conjugation does not occur because at least
two gain gratings shifted in phase by pi are formed in the active medi
um of the laser.