Abstract
In this paper a novel highly birefringent neodymium-doped microstructured optical fiber is presented. The modal properties of the structure are analyzed numerically using a fully vectorial finite difference method. Results obtained are compared with experimental near-field measurements. The emission properties of the structure have also been investigated. The emission cross-sections at 900, 1064 and 1334 nm have been measured. Laser action has been achieved at a wavelength of 1064 nm in the simplest configuration, based on Fresnel light reflection at both ends of the fiber. The optical conversion efficiency was 9% and the slope efficiency reached 16%. A laser configuration with an external fiber Bragg grating has also been studied; promising results obtained for this configuration suggest that such a laser can find applications in sensing.
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