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提出了一种基于全光纤多程相位调制的光谱控制方法,并对其进行了理论模拟和实验研究。理论模拟结果表明,调制次数、调制深度、调制信号形状和宽度以及调制信号和光脉冲的时间同步均会对输出光谱的中心波长、光谱宽度和形状产生影响。在实验上对光谱宽度为0.03nm的注入信号进行多程相位调制,得到了带宽为2.238nm的输出光谱,实验结果与理论模拟结果相符合。并从实验上研究了不同相位调制信号波形与输出光谱的对应关系,验证了通过控制调制信号波形进行光谱特性控制的可行性。
A spectrum control method based on all-fiber multi-pass phase modulation is proposed, and its theoretical simulation and experimental research are carried out. Theoretical simulation results show that the modulation wavelength, the modulation depth, the shape and width of the modulation signal and the time synchronization between the modulation signal and the optical pulse all affect the center wavelength, spectral width and shape of the output spectrum. The experimental results show that the output spectrum with the bandwidth of 2.238 nm is obtained through the multiphase phase modulation of the input signal with the spectral width of 0.03 nm. The experimental results are consistent with the theoretical simulation results. The corresponding relationship between different phase modulated signal and output spectrum is studied experimentally, and the feasibility of controlling the spectral characteristics by controlling the modulated signal waveform is verified.