Properties of grazing-incidence pulsed Ti:sapphire laser oscillator

A pulsed operation of a double-grating Ti:sapphire laser oscillator that consists of a gain medium, back mirror, and two gratings, was shown. A stable single longitudinal mode operation was achievable. From the calculation of the optical path, it can be explained by the increased beam walk-off from the gain medium by the introduction of the second grating compared with the conventional grazing incidence cavity geometry. The improved spectral property was also explained by the calculations of increased dispersion. The results indicate that the oscillator configuration was useful for the applications which require stable mode operation and narrow linewidth such as the high resolution spectroscopy or the laser isotope separation.