Godin T, Wetzel B, Sylvestre T, Larger L, Kudlinski A, Mussot A, Ben Salem A, Zghal M, Genty G, Dias F, Dudley J M
Institut FEMTO-ST, UMR 6174 CNRS-Université de Franche-Comté, 25030 Besançon, France.
Opt Express. 2013 Jul 29;21(15):18452-60. doi: 10.1364/OE.21.018452.
We use dispersive Fourier transformation to measure shot-to-shot spectral instabilities in femtosecond supercontinuum generation. We study both the onset phase of supercontinuum generation with distinct dispersive wave generation, as well as a highly-unstable supercontinuum regime spanning an octave in bandwidth. Wavelength correlation maps allow interactions between separated spectral components to be identified, even when such interactions are not apparent in shot-to-shot or average measurements. Experimental results are interpreted using numerical simulations. Our results show the clear advantages of dispersive Fourier transformation for studying spectral noise during supercontinuum generation.
我们使用色散傅里叶变换来测量飞秒超连续谱产生过程中逐脉冲的光谱不稳定性。我们研究了超连续谱产生的起始阶段以及不同色散波的产生，还研究了带宽跨越一个倍频程的高度不稳定超连续谱区域。波长关联图能够识别分离光谱成分之间的相互作用，即使这种相互作用在逐脉冲测量或平均测量中并不明显。实验结果通过数值模拟进行解释。我们的结果表明了色散傅里叶变换在研究超连续谱产生过程中的光谱噪声方面具有明显优势。
