论文部分内容阅读
基于交叉相位调制的时间透镜可实现精确的二次相位调制,但是它在光脉冲压缩领域的应用受到了抽运光脉冲的峰值功率过高的限制.对该峰值功率的表达式进行了推导,提出使用带有正色散的传输介质来实现输出段色散,从而降低了抽运光脉冲的峰值功率.并进一步指出,可以将基于交叉相位调制的时间透镜应用于4f系统,来实现光脉冲压缩,从而更有效地降低了抽运光脉冲的峰值功率.推导了该系统的抽运光脉冲的峰值功率和分辨率的表达式,并进行了光脉冲压缩的仿真分析.研究结果表明,在基于交叉相位调制的4f系统中,可以利用峰值功率较低的抽运光脉冲产生飞秒量级超短光脉冲;随着压缩系数的提高,输出光脉冲的脉冲宽度主要受到4f系统分辨率的限制,并对4f系统分辨率的提高进行了讨论.
However, its application in the field of optical pulse compression is limited by the high peak power of the pump light pulse.The expression of the peak power is deduced, It is proposed to use the transmission medium with positive dispersion to realize the dispersion of the output section, so as to reduce the peak power of the pump pulse. Furthermore, it is further pointed out that the time-frequency modulation based on the cross-phase modulation can be applied to the 4f system to achieve optical pulse compression, Thus reducing the peak power of pumping light pulse more effectively.The expression of peak power and resolution of pumping light pulse is deduced and the simulation of light pulse compression is carried out.The results show that in the crossover In the phase-modulated 4f system, the ultra-short femtosecond pulses with the lower peak power can be generated. With the increase of the compression coefficient, the pulse width of the output light pulse is mainly limited by the 4f system resolution, And 4f system resolution is discussed.