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.
© 1999 Optical Society of America
Original Manuscript: September 3, 1998
Revised Manuscript: October 28, 1998
Published: February 20, 1999
Uwe D. Zeitner, Harald Aagedal, and Frank Wyrowski, "Comparison of resonator-originated and external beam shaping," Appl. Opt. 38, 980-986 (1999)