Spectral noise analysis of Er3+: Ti : LiNbO3 curved waveguide amplifiers

We report simulations concerning optical amplification in Er:Ti:LiNbO3 curv ed waveguides. The derivation and the evaluation of the spectral optical ga in, the spectral noise figure, the amplified spontaneous emission photon nu mber, and the signal to noise ratio are performed under the small gain appr oximation. The simulations show the evolution of these parameters under var ious pump regimes, Er concentration profiles and waveguide lengths. The res ults obtained are of significant interest for the design of complex, rare e arth-doped integrated optics structures involving bent waveguides.