PASSIVELY Q-SWITCHED ND-DOPED WAVE-GUIDE LASER

A passively and-switched waveguide laser operating at 1.054 mu m has b een demonstrated in a Nd-doped phosphate glass. The channel waveguide was fabricated by K-ion exchange from a nitrate melt. Passively and-sw itched pulses were achieved by placement of an acetate sheet containin g an organic saturable-absorbing dye within the laser cavity. The resu lting pulse train consisted of pulses with a FWHM of similar to 25 ns and peak powers of 3.04 W. With an 80% transmitting output coupler, cw operation of the laser provided 5.2 mW of output power at 1.054 mu m for 229 mW of absorbed 794-nm pump power.