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对注入有源Fabry-Perot腔内的单纵模脉冲进行了延时理论分析,计算了Fabry-Perot腔内增益,并对脉冲输出进行了数值模拟,结果表明当脉冲能量衰减到一定值时,新增抽运粒子数提供的增益可以补偿腔内损耗,延时脉冲的输出可以达到稳态.然后利用激光二极管侧面抽运Nd:YAG激光器做为Fabry-Perot腔,对外部入射的单纵模脉冲光进行了延时,得到了延时时间2μs、脉冲数量140个的实验结果.最后利用有源Fabry-Perot腔对参考光进行延时,声光移频器对信号光产生频移,进行了外差实验,实验结果与移频器的设置值相符,误差在4%以内.
Time-delay theoretical analysis of the single longitudinal mode pulse injected into the active Fabry-Perot cavity was performed. The gain of the Fabry-Perot cavity was calculated and the pulse output was numerically simulated. The results show that when the pulse energy decays to a certain value, The gain provided by the new pumping particles can compensate the loss in the cavity, and the output of the delay pulse can reach the steady state.And then use the laser diode side pumped Nd: YAG laser Fabry-Perot cavity, the external incident single longitudinal mode Pulsed light was delayed, the experimental results of the delay time 2μs, the number of pulses 140. Finally, the use of active Fabry-Perot cavity on the reference light time delay, the acousto-optic frequency shifter signal frequency shift, carried out The heterodyne experiment, the experimental results and set the value of the shifter, the error is less than 4%.