Five color CO2laser stabilization and switching

A CO
2
laser is described which may be actively stabilized in any of four different
R/P
line pairs in the 10.4 μ band. The laser may be caused to rapidly switch between line pairs. The degree of frequency stability achieved is
\sim1:10^{10}
, 5 Hz and above, and
\sim1:10^{8}
, 0-5 Hz. The laser may be switched through the four line pairs in ∼100 ms.