Comparison of resonator-originated and external beam shaping.
The spatial shaping of laser beams is a subject of research in modern optics. Recently the introduction of diffractive elements in laser resonators has offered an alternative to external beam-shaping optics by mode shaping within the resonator. We describe the specification of the laser resonator mirrors to obtain by means of internal mode shaping a desired beam outside the resonator. Modal discrimination of the modified resonator and the mirror alignment sensitivity is discussed. Basic features of resonator-originated and external beam shaping are compared.
Zeitner
U D
UD
Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Jena, Germany.
Aagedal
H
H
Wyrowski
F
F