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Proceedings Paper

Investigations of the coupling between core modes and cladding modes in a double-clad Yb-doped photonic crystal fiber
Author(s): Carsten K. Nielsen; Erling Riis; Anders Petersson; Jes Broeng
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Paper Abstract

In this work a new model based on the work with new double-clad Yb-doped photonic crystal fibers is presented. The model describes the effect of a coupling between core modes and cladding modes, causing a loss of power out of the core. The model agrees well with an experimental observed asymmetry in the output powers from the two ends of a pumped fiber due to pump depletion and the core-cladding coupling. A method to estimate the core-cladding coupling is included. The magnitude of the coupling depends on the geometry of the fiber. If an asymmetry is introduced between the coupling for the two orthogonal linear polarization directions, an polarization creating mechanism is predicted. This feature is investigated for a fiber where the asymmetric loss has been implemented by manufacturing the fiber to have an asymmetric transverse geometry.

Paper Details

Date Published: 7 June 2004
PDF: 12 pages
Proc. SPIE 5335, Fiber Lasers: Technology, Systems, and Applications, (7 June 2004); doi: 10.1117/12.528230
Show Author Affiliations
Carsten K. Nielsen, Univ. of Aarhus (Denmark)
Erling Riis, Univ. of Strathclyde (United Kingdom)
Anders Petersson, Crystal Fibre A/S (Denmark)
Jes Broeng, Crystal Fibre A/S (Denmark)

Published in SPIE Proceedings Vol. 5335:
Fiber Lasers: Technology, Systems, and Applications
L. N. Durvasula, Editor(s)

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