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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 7 — Mar. 1, 2012
  • pp: 987–993

Fast M 2 measurement for fiber beams based on modal analysis

Daniel Flamm, Christian Schulze, Robert Brüning, Oliver A. Schmidt, Thomas Kaiser, Siegmund Schröter, and Michael Duparré  »View Author Affiliations


Applied Optics, Vol. 51, Issue 7, pp. 987-993 (2012)
http://dx.doi.org/10.1364/AO.51.000987


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Abstract

We report on a fast and experimentally easy technique for measuring the beam propagation ratio M 2 of light guided by optical fibers. A holographic filter enables us to determine amplitudes and phases of the excited fiber eigenmodes. The coherent superposition of modes allows the reconstruction of the optical field. With this information at hand, we are able to simulate the free-space propagation of the beam and to perform a virtual caustic measurement. Associated beam propagation ratios M 2 accurately agree with ISO-standard measurements.

© 2012 Optical Society of America

OCIS Codes
(030.4070) Coherence and statistical optics : Modes
(060.2310) Fiber optics and optical communications : Fiber optics
(090.1760) Holography : Computer holography
(140.3295) Lasers and laser optics : Laser beam characterization

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 1, 2011
Manuscript Accepted: November 3, 2011
Published: March 1, 2012

Citation
Daniel Flamm, Christian Schulze, Robert Brüning, Oliver A. Schmidt, Thomas Kaiser, Siegmund Schröter, and Michael Duparré, "Fast M2 measurement for fiber beams based on modal analysis," Appl. Opt. 51, 987-993 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-7-987

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