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
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