A Q-switch Nd:YAG laser is used to pump two OPO's in series. The first
one uses a LiNbO3 crystal and is adjusted at lambda(s)=1,82 mu m It p
umps the second one which uses an AgGaSe2 crystal and is tunable betwe
en 2.15 mu m and 12 mu m. The total conversion energy between the OPO
at lambda(s)=2.6 mu m and lambda(i)=6 mu m and the laser at 1.064 mu m
is 1.75 %. The total tunability of the whole source ranges from 1.44
mu m to 12 mu m.