Abstract

DBF laser of this type is based on the modulation of activator concentration being introduced into the crystal during the growth process.¹ As a result, spatial periodic structures of activator concentration $N_a(z)={\displaystyle \sum N_m^a}(z)\cdot {\ell }^{imqz}$ and refractive index $n(z)={\displaystyle \sum n_m}(z)\cdot {\ell }^{imqz}$ are formed with the period L (q = 2π/Λ) and profile determined by crystal growth conditions.² Rescattering of the counter-running waves of generation on the structures leads to the DFB.

© 1994 IEEE