CALCULATION OF SOME SPECTROSCOPIC PARAMETERS OF LiNbO3:Er3+OPTICAL WAVEGUIDES

Based on the transmission spectra of Er3+-doped LiNbO3 optical waveguides in this paper we report some experimental and theoretical results concerning the evaluation of some spectroscopic parameters which characterize the above mentioned waveguides. The absorption experimental spectra were used to determine the homogeneous absorption and emission cross sections (utilising the density matrix formalism and the McCumber's theory and taking into account the Stark splitting of the levels), the oscillator strength of the absorption transition, the spontaneous emission probabilities, radiative lifetime and the excitation energy in three regions of the optical spectrum: around 1550 nm, 980 nm and 550 nm, respectively. The obtained results are in good agreement with other ones published in the literature in the last few years and can be used for the theoretical modelling of the guided lasers and amplifiers, design of guided optoelectronic devices etc