Phase Conjugation Based on a Brillouin Liquid at 1.06µm and 2.09µm

In many lidar applications laser sources capable of producing high energy laser pulses with a diffraction imited wavefront are required. The energy of the pulses is usually increased by adding one or several optical amplifier stages. However the optical amplifiers tend to degrade the wavefront quality to several times the diffraction limit. Phase conjugate mirrors for beam aberration correction have been proposed [1].