Dynamic Characterization of Upconversion in Highly Er-Doped Silica Photonic Crystal Fibers

作者：Valles Juan A^*; Berdejo Victor; Angel Rebolledo Miguel; Diez Antonio; Sanchez Martin Jose A; Andres Miguel V

来源：IEEE Journal of Quantum Electronics, 2012, 48(8): 1015-1022.

DOI：10.1109/JQE.2012.2199962

• Characterization
• erbium-doped silica
• inter-atomic energy-transfer interactions
• photonic crystal fiber

Measurements of time evolution of amplified spontaneous emission for square-wave modulated pump were made on a highly erbium-doped silica photonic crystal fiber and fitted to theoretical results calculated using different formalisms to describe the Er3+-ion migration-assisted co-operative upconversion mechanism in the population densities rate equations. The determined characterization parameters are the constant homogeneous upconversion coefficient, 3.0 x 10(-24) m(3)/s, the critical radii for upconversion and migration, 10.5 and 14 angstrom, respectively, and the rate of clustered ions, 14%. These parameters are analysed and compared to those obtained with continuous-wave pump characterization techniques. Although similar values are obtainable for many parameters using steady-state and dynamic characterization techniques, if a careful enough modelling is carried out, dynamic techniques are preferable to assess the presence of pair-induced quenching.

• 出版日期2012-8