Stark effect in f-f spectra of LiNbO 3 :Er 3 +

R. Burlot-Loison, J.L. Doualan, P. Le Boulanger +1 more

Alexander A. Kaplyanskii, V. N. Medvedev, Alexander P. Skvortsov

De‐Long Zhang, Qi Li, Ping‐Rang Hua +3 more

Chi‐Hung Huang, L. McCaughan

The polarization-dependent absorption and emission spectra of the 4113/2-4115/2 transition (A - 1.5 pm) in single crystal bulk Er:LiNbOs have been measured. Low-temperature (10 K) measurements of the Stark split energy levels of these two manifolds indicate at least two Er3+ sites. McCumber theory is applied to determine the Er:LiNb03 absorption and emission cross sections. These values are used to calculate the gain charac- teristics of Er:LiNbOs channel waveguides. Calculations indicate that a gain of 10 dB is achievable in a waveguide of several centimeters using -20-mW pump power.

Niculae N. Puşcaş, I. Popescu

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, the radiative lifetime and the excitation energy in three regions of the optical spectrum: around 1550 nm, 980 nm and 550 nm, respectively. Also, we measured the rising and falling times and we calculated the homogeneous upconversion factor corresponding to the transition 4I15/2->4F7/2.

Chen Shu

The characterizes of gain of Er 3+ :LiNbO 3 waveguide amplifier are studied. LiNbO 3 passive waveguide devices are small signal pump light establish on a modeling of quasi two level system built specially for pump wavelength at 980nm and neglecting ESA and ASE. The numerical simulation is done for single and double pass configuration respectively.