Continuously pumped all-solid-state laser system with fiber phase conjugation

Summary form only given. For industrial applications like materials processing continuously pumped, repetitively Q-switched solid-state laser systems are attractive due to their and compactness and reduced financial efforts. Conventional laser systems suffer from thermally induced phase distortion, which reduces the beam quality significantly. Phase conjugation can overcome this problem by compensating phase distortion in double pass arrangements. Stimulated Brillouin scattering (SBS) facilitates self-pumped phase conjugation in multimode glass fibers. These solid-state devices are preferable because they are easy to handle and the SBS peak power threshold can be determined by the appropriate fiber core diameter. Due to the long interaction length inside the fiber the SBS threshold can be reduced down to the 200-W level. Continuously pumped, Q-switched all-solid-state MOPA systems with fiber phase conjugator are presented and different amplifier arrangements are discussed.