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Measurement of the optical phase relation among subharmonic pulses in a femtosecond optical parametric oscillator

机译:飞秒光学参量振荡器中次谐波脉冲之间的光学相位关系的测量

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摘要

We observed the phase relation among subharmonic pulses generated by a femtosecond optical parametric oscillator (OPO). The ratio of the optical frequencies of the idler, the signal, and the pump pulses was set to 1:2:3. Under these conditions the wavelengths of the second harmonic of the signal pulse and the sum frequency between the pump and the idler pulses are the same. The beat signal between these two pulses represents the phase relationship among the pump, the signal, and the idler. The beat frequency varied when the cavity length of the OPO was changed.
机译:我们观察到了飞秒光学参量振荡器(OPO)产生的次谐波脉冲之间的相位关系。惰轮,信号和泵浦脉冲的光学频率之比设置为1:2:3。在这些条件下,信号脉冲的二次谐波的波长以及泵浦脉冲和惰轮脉冲之间的总频率相同。这两个脉冲之间的差拍信号表示泵,信号和惰轮之间的相位关系。当OPO的腔长改变时,拍频也会变化。

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