Control of the Bragg wavelength in fibre Bragg grating writing process using the phase mask method

摘要

The paper specifies the achievable Bragg wave shift generated by pre-stressing the optical fibre in the phase maskwriting process. The maximum possible shift results from the mechanical strength of the optical fibre to axial stress. Twomethods are also proposed for the production of Bragg gratings with a controlled Bragg wavelength. The experiment wasperformed for the SMF28 fibre subjected to the hydrogenation process. The FBG fabrication was carried out in theexcimer laser system using the phase mask method.