基于正色散单模光纤、掺Ybs+增益光纤和多模光纤光栅,提出了一种可调高功率双波长自相似抛物线脉冲激光器.采用非线性薛定谔方程描述双波长自相似抛物线脉冲的传输和演化过程,并利用分步傅里叶方法进行数值模拟.输入脉冲在正色散单模光纤与掺镱增益光纤中产生自相似抛物线脉冲,多模光纤布拉格光栅对激光器进行双波长选择,通过调节偏振控制器实现双波长稳定运行.数值模拟分析结果表明该激光器的运行是可行且有效的.
A switchable high power dual-wavelength self-similar parabolic pulse laser is proposed based on normal dispersion single-mode fiber,Yb3+ doped gain fiber and multimode fiber Bragg grating.The transmission and evolution of dual-wavelength self-similar parabolic pulse are simulated numerically by split-step Fourier method with the nonlinear Schr(o)dinger equations.The input pulses produce self-similar parabolic pulses in normal dispersion single-mode fiber and Yba+ doped gain fiber.The dual-wavelength selection is carried out by a multimode fiber Bragg grating for laser.The dual-wavelength stable operation is realized by adjusting the polarization controller.Numerical simulation shows that the operation of the laser is feasible and effective.
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