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本文提出一种在单模光纤负群速色散区由连续波产生超短光脉冲串的新方法．即让波长位于光纤负色散区的连续波和波长位于光纤正色散区的泵浦脉冲串在光纤中共同传输，在光纤的零色散波位于连续波波长与泵浦脉冲波长中间附近的情况下，交叉相位调制与喇曼放大能使连续波演化成比泵浦脉冲窄得多的、无调啾、无脉座的超短光脉冲串，数值计算表明，泵浦脉冲愈强，由连续波产生的超短光脉冲宽度愈窄、峰值功率愈高、而且所需的光纤愈短．
This paper presents a new method for generating ultrashort optical pulse trains from continuous wave in a negative mode speed dispersion region of a single mode fiber. That is, the continuous wave with the wavelength located in the negative dispersion zone of the optical fiber and the pump pulse train with the wavelength located in the positive dispersion zone of the optical fiber are jointly transmitted in the optical fiber. When the zero dispersion wave of the optical fiber is located near the middle of the continuous wave wavelength and the pump pulse wavelength, The cross-phase modulation and Raman amplification can make the continuous wave evolve into a much narrower tuned, pulseless ultrashort optical pulse train than the pump pulse. Numerical calculations show that the stronger the pump pulse is generated by the continuous wave The shorter the pulse width of the ultrashort light, the higher the peak power, and the shorter the required fiber.