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通过对光纤中传输的孤子波演化及其色散波相互作用的动力学方程分析,详细推导了环形腔非线性偏振旋转(NPR)锁模光纤激光器中色散波与孤子波相互干涉而产生的脉冲光谱边带偏移量的理论计算公式。并将各级边带波长与脉冲中心波长的偏移量理论值与相应的实验测量值进行了对比,理论值与实验值符合得非常好,其最大误差在4.1%以下。从而解释了在偏振控制被动锁模条件下,环形腔光纤激光器光谱边带产生的原因。
By analyzing the dynamics of soliton wave propagation and its dispersion wave propagating in optical fiber, the pulsed spectrum generated by the interference between dispersion wave and soliton wave in the nonlinear cavity rotation (NPR) mode-locked fiber laser is deduced in detail. Theoretical calculation formula of sideband offset. The theoretical value of the shift between the wavelength of the sidebands and the central wavelength of the pulse is compared with the corresponding experimental value. The theoretical value is in good agreement with the experimental value, and the maximum error is below 4.1%. The reason why the spectral sideband of the ring cavity fiber laser is generated under the passive mode-locked condition of polarization control is explained.