7 June 2004 Investigations of the coupling between core modes and cladding modes in a double-clad Yb-doped photonic crystal fiber
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Proceedings Volume 5335, Fiber Lasers: Technology, Systems, and Applications; (2004) https://doi.org/10.1117/12.528230
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States
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.
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Carsten K. Nielsen, Carsten K. Nielsen, Erling Riis, Erling Riis, Anders Petersson, Anders Petersson, Jes Broeng, Jes Broeng, } "Investigations of the coupling between core modes and cladding modes in a double-clad Yb-doped photonic crystal fiber", Proc. SPIE 5335, Fiber Lasers: Technology, Systems, and Applications, (7 June 2004); doi: 10.1117/12.528230; https://doi.org/10.1117/12.528230
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