摘要:
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.
Abstract:
The delay theoretical analysis result of single-longitudinal-mode pulse injected in active Fabry-Perot cavity has been obtained. The gain in Fabry-Perot cavity has been calculated and the numerical simulation result of output pulse has been obtained. The results show that when the energy of the pulse decreases at a certain value, the gain produced by increased pump particle population can compensate the loss in the cavity and the delay pulse can achieve steady state. In experiment, the active Fabry-Perot cavity is a Nd： YAG laser sided pumped by laser diode. For the pulse inputed externally, we achieve 140 pulses within 2 ~ts. Finally, the reference light is delayed using the active Fabry-Perot cavity. And we show the heterodyne experiment of signal light whose frequency shift generated by an acousto-optic modulation （AOM）, and the experiment results accord with the frequency shift of the AOM and the error is less than 4%.
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