18 February 2010 Complete description of optical fields propagating in passive LMA fibers regarding amplitude, relative phase delay, and polarization by means of optical correlation filters
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Proceedings Volume 7579, Laser Resonators and Beam Control XII; 75790R (2010); doi: 10.1117/12.845979
Event: SPIE LASE, 2010, San Francisco, California, United States
Abstract
The coexistence of different propagating modes inside an optical multi mode fiber (MMF) determines the properties of the emerging beam. Hence, detailed knowledge of the (transversal) modal content became essential to understand the underlying physical effects. Different approaches were applied to acquire knowledge about modal content of MMFs such as interferometry or M2 respectively S2 measurement. In this paper we present new results concerning the access to full field information of vector beams, emerging from two step-index LMA fibers (V -parameter 3.96 and 4.72, respectively). Thereby, the direct approachable measurement data consists in modally resolved information about polarization state, intermodal power distribution and intermodal phase delay. By means of the reconstructed field, "global" characterizations of the investigated beams, e.g., in form of the widespread beam propagation ratio M2, are possible.
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Daniel Flamm, Siegmund Schröter, Michael Duparré, "Complete description of optical fields propagating in passive LMA fibers regarding amplitude, relative phase delay, and polarization by means of optical correlation filters", Proc. SPIE 7579, Laser Resonators and Beam Control XII, 75790R (18 February 2010); doi: 10.1117/12.845979; https://doi.org/10.1117/12.845979
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KEYWORDS
Optical fibers

Polarization

Polarizers

Beam propagation method

Electroluminescence

Near field

Optical filters

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