Dynamic of generation tuning of short-cavity single-frequency fibre lasers

By the help of numerical modelling we calculate the dynamics of generation of high-speed tunable fibre laser with controllable Bragg grating and inside-cavity waveguide electrooptic cell. The dependence of switching time on the power of signal remaining on the wavelength into which the radiation is tuned, on concentration of doping elements, reflectivity of cavity output mirror and optical pump power is obtained. It is shown that additional losses because of the coupling of optical fibre and Bragg grating written on electrooptic waveguide results in reduction of the switching time, however at the same time the efficiency of laser generation also decreases.