Subnanosecond laser pulses for plasma production

A laser source suitable for plasma production is described. The technique involves the use of uncoated flats that act as mode selectors when inserted inside the laser cavity. Pulse widths of 15 to 30 and 60 to 70 ps were obtained with signal-to-noise ratios greater than 20 dB for 70 to 80 percent of the laser firings.