High-birefringent and high-gain erbium-doped polarization-maintaining fiber

Bent Edvold; Bera Palsdottir

doi:10.1117/12.188718

3 October 1994 High-birefringent and high-gain erbium-doped polarization-maintaining fiber

Bent Edvold, Bera Palsdottir

Proceedings Volume 2289, Doped Fiber Devices and Systems; (1994) https://doi.org/10.1117/12.188718
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Bent Edvold and Bera Palsdottir "High-birefringent and high-gain erbium-doped polarization-maintaining fiber", Proc. SPIE 2289, Doped Fiber Devices and Systems, (3 October 1994); https://doi.org/10.1117/12.188718

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