论文标题
非线性光谐振器中的孤立光束传播可以实现高效脉冲压缩和模式自我清洁
Solitary beam propagation in a nonlinear optical resonator enables high-efficiency pulse compression and mode self-cleaning
论文作者
论文摘要
产生具有高质量空间模式的激烈的超短脉冲对于超快和强场科学至关重要。这可以通过控制飞秒脉冲的传播在Kerr非线性的影响下，并以高强度实现稳定的传播来实现。在这项工作中，我们建议在定期分层Kerr培养基中生成空间孤子，可以使用多个薄板为超脑产生和脉冲压缩提供最佳条件。通过实验和理论研究，我们成功地识别了这些孤立模式，并揭示了光束大小与关键非线性相之间的普遍关系。时空耦合显示出强烈影响飞秒脉冲的光谱，空间和时间谱。利用这些孤立模式的独特特征，我们展示了飞秒脉冲的单阶段超脑脉动生成和压缩，从最初的170 fs降至22 fs，效率约为90％。我们还提供了有效模式自我清洁的证据，这表明非线性谐振器中激光束的丰富时空自组织过程。
Generating intense ultrashort pulses with high-quality spatial modes is crucial for ultrafast and strong-field science. This can be accomplished by controlling propagation of femtosecond pulses under the influence of Kerr nonlinearity and achieving stable propagation with high intensity. In this work, we propose that the generation of spatial solitons in periodic layered Kerr media can provide an optimum condition for supercontinuum generation and pulse compression using multiple thin plates. With both the experimental and theoretical investigations, we successfully identify these solitary modes and reveal a universal relationship between the beam size and the critical nonlinear phase. Space-time coupling is shown to strongly influence the spectral, spatial and temporal profiles of femtosecond pulses. Taking advantage of the unique characters of these solitary modes, we demonstrate single-stage supercontinuum generation and compression of femtosecond pulses from initially 170 fs down to 22 fs with an efficiency ~90%. We also provide evidence of efficient mode self-cleaning which suggests rich spatial-temporal self-organization processes of laser beams in a nonlinear resonator.
