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Updated: Jul 7, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Comparison of resonator-originated and external beam shaping
U D Zeitner1, H Aagedal, F Wyrowski
1Institut für Angewandte Physik, Friedrich-Schiller-Universität Jena, Jena, Germany.
Abstract:
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.
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