| Original Articles |
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Laser Amplification Mechanism in an Nd3+-Doped
Polymer Optical Fiber |
| GUO Yang1;ZHENG Xing1;MINNG Hai1;ZHANG Qi-Jin2 |
| 1Department of Physics, 2Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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GUO Yang, ZHENG Xing, MINNG Hai et al 2001 Chin. Phys. Lett. 18 1337-1340 |
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Abstract The Judd-Ofelt theory was applied to optical-absorption transitions in an Nd3+-doped polymer optical fiber to obtain intensity parameters (Ω2 = 0.83 x 10-20cm2, Ω4 = 1.64 x 10-20cm2, Ω6 = 4.04 x 10-20cm2) the radiative lifetime (371 μs) and quantum efficiency (0.73) of the 4G5/2level, from which we found that the transition probability from 4G5/2 to 4I9/2(Aij = 1995.7 s-1) is higher than others. Thus, in the polymer system, the traditional four-level laser system for the Nd3+ was substituted by a three-level system. Furthermore, we have calculate the emission cross section(σeij =2.45 x 10-21cm2), and solved the differential equations of the single-pass gain. In comparsion with the case of the inorganic optical fiber, an increased saturated intensity is observed.
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| Keywords:
32.70.Cs
42.70.Jk
42.81.Cn
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Published: 01 October 2001
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| PACS: |
32.70.Cs
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(Oscillator strengths, lifetimes, transition moments)
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42.70.Jk
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(Polymers and organics)
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42.81.Cn
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(Fiber testing and measurement of fiber parameters)
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