GENERATION OF STEADY-STATE ULTRASHORT LASER-PULSES BASED ON A NOVEL NONLINEAR MICHELSON INTERFEROMETER

A pulsed neodymium-doped yttrium aluminium garnet laser mode locked by a novel nonlinear Michelson interferometer, where one branch contains a frequency-doubling potassium titanyl orthophosphate crystal, is rep orted for the first time. Under the optimal experimental condition, sh orter than 10 ps average pulse width at 1-06 mum and up to 95% reprodu cibility of mode locking can be obtained, and the stability of output energy is about 7.5%. Finally, the reason why its mode-locking output characteristics have been significantly improved is also analysed in t his paper.