Tom H W, Stolen R H, Aumiller G D, Pleibel W
Opt Lett. 1988 Jun 1;13(6):512-4. doi: 10.1364/ol.13.000512.
We have prepared an optical fiber that produces efficient (0.24%) second-harmonic conversion by using modelocked 1.064-microm laser pulses along with a harmonic seeding beam. The effective coherence length increased to 35 cm as compared with only a few centimeters in fibers prepared with mode-locked Q-switched pulses. We show that the input bandwidth of the pump pulse imposes a fundamental limit on the effective coherence length and that this length can be severely reduced by competing nonlinear effects.
我们制备了一种光纤，通过使用锁模1.064微米激光脉冲以及谐波种子光束，该光纤能实现高效（0.24%）的二次谐波转换。与使用锁模调Q脉冲制备的光纤中仅有几厘米的有效相干长度相比，此处的有效相干长度增加到了35厘米。我们表明，泵浦脉冲的输入带宽对有效相干长度施加了一个基本限制，并且这种长度会因竞争非线性效应而大幅缩短。
