Transform-limited-bandwidth injection locking of an XeF laser with an Ar-ion laser at 3511 A

We report attainment of transform-limited bandwidth in an XeF laser by injection locking a positive-branch confocal unstable resonator with 1 W of power from an Ar-ion laser at 3511 A. A diffraction-limited beam of >2-MW power, with a bandwidth of ~50 MHz (~1 x 10(-4) A), is generated. We find that since the XeF UV emission lines start from differentupper vibrational levels of the B state, ~40% of the B ? X energy is not available to be channeled into the locked line.