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Proceedings Paper

High-birefringent and high-gain erbium-doped polarization-maintaining fiber
Author(s): Bent Edvold; Bera Palsdottir
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Paper Abstract

An erbium-doped polarization-maintaining (PM) fiber has been manufactured. The core is codoped with Ge and Al and a gain of 36 dB is achieved. The fiber design utilizes the combined effects of an elliptical stress-inducing cladding and an elliptical core to achieve a high birefringence of 3.1 X 10-4 and a polarization crosstalk below -37 dB for a 10 m length. To optimize the birefringence, a model of the distribution of thermal stress in an elliptical-cladding fiber has been developed, which yields an accurate expression for the birefringence. The additional geometrical birefringence due to the elliptical shape of the core can be superimposed on this result. Measurements of birefringence versus wavelength confirm the predictions of the model. The erbium-doped polarization-maintaining fiber has been tested in an all-PM fiber ring laser having highly linearly polarized output.

Paper Details

Date Published: 3 October 1994
PDF: 9 pages
Proc. SPIE 2289, Doped Fiber Devices and Systems, (3 October 1994); doi: 10.1117/12.188718
Show Author Affiliations
Bent Edvold, Lycom A/S (Denmark)
Bera Palsdottir, Lycom A/S (Denmark)

Published in SPIE Proceedings Vol. 2289:
Doped Fiber Devices and Systems
Michel J. F. Digonnet, Editor(s)

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