Synthesis of Laser Resonator Configurations as an Inverse Problem in Optics

Direct synthesis of the laser beam with pre-determined intensity distribution by means of intracavity beam shaping

“…This enables controlling both the phase profile of the output radiation and the intensity distribution within the system. Active optical elements within the resonator can be applied for solving various problems: correction of aberrations in the output radiation caused by optical distortions of the active medium and thermal deformations of the resonator mirrors 3-5 ; maximizing the output radiation power 6,7 ; formation of the beam with a given intensity distribution [8][9][10][11][12][13][14] ; formation of the dynamic generation regimes 6, 7, 15, 16 . In the present paper, we consider the problem of formation of output laser radiation with the given intensity distribution. Using the theory of inverse optical problems 17 with the resonator specific features taken into account 13 , the resonators with a back DM and semitransparent output mirror are investigated.…”

“…Active optical elements within the resonator can be applied for solving various problems: correction of aberrations in the output radiation caused by optical distortions of the active medium and thermal deformations of the resonator mirrors 3-5 ; maximizing the output radiation power 6,7 ; formation of the beam with a given intensity distribution [8][9][10][11][12][13][14] ; formation of the dynamic generation regimes 6, 7, 15, 16 . In the present paper, we consider the problem of formation of output laser radiation with the given intensity distribution. Using the theory of inverse optical problems 17 with the resonator specific features taken into account 13 , the resonators with a back DM and semitransparent output mirror are investigated. Within the framework of the developed approach, using the diffraction approximation in relation to the configuration of the reference resonator, the basic characteristics of the system are studied, namely, the quality of formation of the given intensity distribution of the output radiation and its phase distribution, the resonator selectivity (with respect to transverse modes), the desired shape of the reflecting surface of the DM.…”