title: Real-time determination of laser beam quality by modal decomposition.
abstract: We present a real-time method to determine the beam propagation ratio M2 of laser beams. The all-optical measurement of modal amplitudes yields M2 parameters conform to the ISO standard method. The experimental technique is simple and fast, which allows to investigate laser beams under conditions inaccessible to other methods.
authors: Institute of Applied Optics, Friedrich-Schiller-University Jena, Jena, Germany.
authors: Oliver A
authors: OA
authors: Schmidt
authors: Christian
authors: C
authors: Schulze
authors: Daniel
authors: D
authors: Flamm
authors: Robert
authors: R
authors: Brüning
authors: Thomas
authors: T
authors: Kaiser
authors: Siegmund
authors: S
authors: Schröter
authors: Michael
authors: M
authors: Duparré
mesh_terms: D000465:Algorithms; D003199:Computer Systems; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000379:methods*; D007834:Lasers; D008027:Light; D012542:Scattering, Radiation