DISTRIBUTED-FEEDBACK LASER Russian patent published in 1994 - IPC

FIELD: quantum electronics. SUBSTANCE: mirror-reflecting coating 4 is applied onto the side of prism 1 behind layer 2 which is activated by dye. Such a method excludes losses of pumping energy for excitation of the dye when power density of pumping is lower than threshold one. Pumping radiation beam 5 being double reflected on mirror coating 4 of layer 2 and onto mirror coating 3 of AB side meets beam 6 in active medium at an angle α which doesn't depend on angle of incidence of pumping onto the side BC of the prism. Interference of these pumping beams in layer 2 activated by dye which results to generation on the base of distributed feedback. EFFECT: improved efficiency of generation. 1 dwg