This paper presents the results of the first mode-locking experiments
on a supersonic chemical oxygen-iodine laser (COIL). Mode locking has
been achieved using an acoustooptic modulator (AOM) and lasing demonst
rated on the TEM(00) modes with a small intracavity aperture. A dc mag
netic field was used to increase the number of axial modes and a peak
power of 2.5 kW has been reached with a pulse width of 2.1 ns at a rep
etition rate of 43.68 MHz.