将信号模场和增益离子横向分布函数引入功率传输方程,采用多环法计算少模光纤放大器中信号及ASE的传输放大.研究增益离子分布对模式竞争和信噪比(SNR)的影响.对照模型改进前后结果,给出两种模型各自适用范围.结果表明,信号填充因子是表征不同模式在竞争中强弱地位的有效指标.增益离子集中掺杂有利于基模的放大和高阶模的抑制；集中均匀掺杂60％～70％较利于基模选择；随着掺杂范围趋于集中,ASE显著降低,信噪比逐渐提高.
参考文献
| [1] | Koplow J P,Kliner D A V,Goldberg L.Single-mode operation of a coiled multimode fiber amplifier[J].Opt.Lett.,2000,25(7):442. |
| [2] | Kelson J,Hardy A A.Strong pumped fiber amplifiers[J].IEEE J.Quant.Electron.,1998,34:1570. |
| [3] | Hardy A A,Oron R.Signal amplification in strongly pumped fiber amplifiers[J].IEEE J.Quant.Electron.,1997,33(3):307. |
| [4] | Lou Qihong,Zhou Jun,et al.Recent progress of high power pulsed double cladding fiber lasers[J].Chinese Journal of Quantum Electronics (量子电子学报),2005,22(4):510 (in Chinese). |
| [5] | Limpert L,Zellmer H,Tünnermann A.Suppression of high order modes in a multimode fiber amplifier using efficient gain-loss-management (GLM)[C].in Advanced Solid-State Lasers,Québec City,Canada,2002,MB20:112. |
| [6] | Hardy A A,Oron R.Amplified spontaneous emission and Rayleigh backscattering in strong pumped fiber amplifiers[J].J.Lightw.Technol.,1998,16(10):1865-1873. |
| [7] | Gong Mali,Yuan Yanyang,Li Chen,et al.Numerical modeling of transverse mode competition in strongly pumped multimode fiber lasers and amplifiers[J].Opt.Expr.,2007,15(6):3236. |
| [8] | Galvanauskas A.Mode-scalable fiber-baaed chirped pulse amplification systems[J].IEEE J.Quant.Electron.,2001,7(4):504. |
| [9] | Paschotta R,Nilsson J,Tropper A C,et al.Ytterbium-doped fiber amplifier[J].IEEE J.Quant.Electron.,1997,33(7):1049. |
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