【摘 要】
：
The Judd-Ofelt theory was applied to optical-absorption transitions in an Nd3+-doped polymer opticalfibre to obtain the intensity parameters (Ω2 ＝ 0.83 x 10-2o
【机 构】
：
Department of Physics,University of Science and Technology of China, Hefei 230026“,”Department of Ma
论文部分内容阅读
The Judd-Ofelt theory was applied to optical-absorption transitions in an Nd3+-doped polymer opticalfibre to obtain the intensity parameters (Ω2 ＝ 0.83 x 10-2o cm2, 4 ＝ 1.64 x 10-20 cm2, Ω6 ＝ 4.04 x 10-20 cm2),the radiative lifetime (371 μs) and the quantum efficiency (0.73) of the 4G5/2level, from which we found tlat the transition probability from 4G5/2 to 4I9/2 (Aij ＝ 1995.7s-1) is higher than others. Thus, in the polymer system, the traditional four-level laser system for Nd3+ was substituted by a three-level system. Furthermore,we have calculated the emission cross section (σeij = 2.45 × 10-21 cm2), and solved the differential equations of the single-pass gain. In comparison with inorganic opticalfibres, an increased saturated intensity is observed.
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