arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.13555physics.optics
收藏

色散管理集成硅波导中色散波捕获辅助超连续谱产生

Supercontinuum generation assisted by dispersive waves trapping in dispersion-managed integrated silicon waveguides

Junxiong Wei, Charles Ciret, Maximilien Billet, François Leo, Bart Kuyken, Simon-Pierre Gorza

摘要:

紧凑的芯片级梳状源在许多实际应用中具有重要意义。在这里,我们实验研究了超连续谱(SC)的产生在轴向变化的集成波导。我们表明,由于色散波被强压缩的泵浦脉冲捕获,色散的局部调谐能够实现色散波的连续蓝移。这种机制为色散变化集成波导中超连续谱的产生提供了新的见解。在飞秒范围内泵浦接近2.2 $μ$ m,脉冲能量为$\sim$ 4 pJ时,输出光谱从1.1 $μ$ m扩展到2.76 $μ$ m,并显示出良好的相干特性。在低至$\sim$ 0.9 pJ的输入能量下也观察到倍频程跨越SC。我们表明,超连续谱是更强大的对输入脉冲参数的变化,也是在我们的数值优化的波导比在固定宽度的波导光谱平坦。这项研究展示了色散变化波导的相干SC产生的潜力,并为集成低功率应用铺平了道路,如芯片级频率梳产生,精密光谱学,光学频率计量学和近红外宽带波分复用。

英文摘要:

Compact chip-scale comb sources are of significant interest for many practical applications. Here, we experimentally study the generation of supercontinuum (SC) in an axially varying integrated waveguide. We show that the local tuning of the dispersion enables the continuous blue shift of dispersive waves thanks to their trapping by the strongly compressed pump pulse. This mechanism provides new insight into supercontinuum generation in a dispersion varying integrated waveguide. Pumped close to 2.2 $μ$m in the femtosecond regime and at a pulse energy of $\sim$ 4 pJ, the output spectrum extends from 1.1 $μ$m up to 2.76 $μ$m and shows good coherence properties. Octave-spanning SC is also observed at input energy as low as $\sim$ 0.9 pJ. We show that the supercontinuum is more robust against variations of the input pulse parameters and is also spectrally flatter in our numerically optimized waveguide than in fixed-width waveguides. This research demonstrates the potential of dispersion varying waveguides for coherent SC generation and paves the way for integrated low power applications, such as chip-scale frequency comb generation, precision spectroscopy, optical frequency metrology, and wide-band wavelength division multiplexing in the near-infrared.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑