Numerical study on self-similar pulses in mode-locking fiber laser by coupled Ginzburg-Landau equation model.
Numerical study on self-similar pulses in mode-locking fiber laser by coupled Ginzburg-Landau equation model.
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DOI：
10.1364/oe.17.000585
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发表时间：
2009-01
期刊：
影响因子：
3.8
通讯作者：
Ting Lei;Chenghou Tu;Fu‐yun Lu;Yixin Deng;E. Li
中科院分区：
文献类型：
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作者：
Ting Lei;Chenghou Tu;Fu‐yun Lu;Yixin Deng;E. Li
建立了非线性偏振演化锁模光纤激光器中自相似脉冲的理论模型。利用耦合的Ginzburg-朗道方程描述了脉冲在单模光纤和增益光纤中的传输。模拟中考虑了两个波片和一个起偏器来实现NPE机制。该模型对激光器进行了全面的描述，并提供了一些有用的脉冲信息。在我们的模拟中，激光器产生高质量的自相似脉冲输出。找到了自相似脉冲稳定工作的区域，并模拟了脉冲沿激光腔沿着不同部分的偏振态。结果表明，脉冲通过起偏器之前，脉冲的偏振态被调制，从椭圆调制到近似圆。
A theoretical model is established to study the self-similar pulses in nonlinear polarization evolution (NPE) mode-locked fiber lasers. The propagation of pulse in single mode fibers and gain fibers are described by coupled Ginzburg- Landau equation (GLE). Two wave plates and a polarizer are considered to realize the NPE mechanism in simulation. This model describes the laser completely and provides some useful pulses' information. In our simulation the laser generates high quality self-similar pulses output. The region of steady self-similar pulses operation is found. The polarization states of different parts across the pulse are simulated along the laser cavity. It is found that polarization states across the pulse are modulated from elliptical to almost circular before the pulse passing through the polarizer.