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Comparison of resonator-originated and external beam shaping

: Zeitner, U.D.; Aagedal, H.; Wyrowski, F.


Applied optics 38 (1999), No.6, pp.980-986
ISSN: 0003-6935
ISSN: 1539-4522
ISSN: 1559-128X
Journal Article
Fraunhofer IOF ()
diffractive optics; laser beam shaping; Laser resonator

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 resona-tororiginated and external beam shaping are compared.