Generation of picosecond pulses in a synchronously pumped dye laser with a lumped and distributed feedback

A method for generation of picosecond tunable dye laser pulses was proposed and implemented. The laser was pumped synchronously and a feedback was established as a result of simultaneous Bragg diffraction on a distributed periodic structure created in a dye and on an external mirror resonator. The efficiency was increased experimentally by a factor of seven compared with a distributed feedback laser and the divergence of the output radiation was reduced sixfold.