Detection of mode conversion effects in passive LMA fibers by means of optical correlation analysis

Thomas Kaiser; Barbara Lüdge; Siegmund Schröter; Daniela Kauffmann; Michael Duparré

doi:10.1117/12.783100

16 April 2008 Detection of mode conversion effects in passive LMA fibers by means of optical correlation analysis

Thomas Kaiser, Barbara Lüdge, Siegmund Schröter, Daniela Kauffmann, Michael Duparré

Proceedings Volume 6998, Solid State Lasers and Amplifiers III; 69980J (2008) https://doi.org/10.1117/12.783100
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

To qualify passive fibers for (high power) laser beam delivery, different experimental approaches (interferometric, heterodyn, M², ...for beam characterization at fiber output are under test in the community. Measurement of the individual strength of different components (eigenmodes) contained in the superposition at the fiber output in dependence for example on bending radius seems to be very promising. This can be done by means of optical correlation filters based on DOEs. For a standard telecommunication fiber SMF-28, operated at 633 nm, this could be demonstrated earlier¹ by us. Here we present experimental results for quantitative proof of LP modes in LMA fibers as well as in SMF-28 fibers by means of such correlation filters, and demonstrate potential and limitations of this approach.

Citation Download Citation

Thomas Kaiser, Barbara Lüdge, Siegmund Schröter, Daniela Kauffmann, and Michael Duparré "Detection of mode conversion effects in passive LMA fibers by means of optical correlation analysis", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 69980J (16 April 2008); https://doi.org/10.1117/12.783100

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