The polarisation properties of a distributed feedback (DFB) fibre laser are investigated experimentally. A birefringent phase-shift is induced by side illumination of the centre part of the lasing structure with ultraviolet (UV) light and it is experimentally shown that the birefringence of the phase-shift is the dominating effect controlling the polarisation properties of the laser.
Philipsen, J. L., Lauridsen, V. C., Berendt, M. O., Varming, P., Povlsen, J. H., Hübner, J., Kristensen, M., & Palsdottir, B. (1998). Polarisation Control of DFB Fibre Laser Using UV-Induced Birefringent Phase-Shift. Electronics Letters, 34(7), 678-679. https://doi.org/10.1049/el:19980492