Coherent master equation for laser modelocking.,Nature Communications

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Coherent master equation for laser modelocking.
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-16 , DOI: 10.1038/s41467-019-14013-4
Auro M Perego ₁ , Bruno Garbin _{2,

3} , François Gustave ₄ , Stephane Barland ₅ , Franco Prati ₆ , Germán J de Valcárcel ₇

Affiliation

Modelocked lasers constitute the fundamental source of optically-coherent ultrashort-pulsed radiation, with huge impact in science and technology. Their modeling largely rests on the master equation (ME) approach introduced in 1975 by Hermann A. Haus. However, that description fails when the medium dynamics is fast and, ultimately, when light-matter quantum coherence is relevant. Here we set a rigorous and general ME framework, the coherent ME (CME), that overcomes both limitations. The CME predicts strong deviations from Haus ME, which we substantiate through an amplitude-modulated semiconductor laser experiment. Accounting for coherent effects, like the Risken-Nummedal-Graham-Haken multimode instability, we envisage the usefulness of the CME for describing self-modelocking and spontaneous frequency comb formation in quantum-cascade and quantum-dot lasers. Furthermore, the CME paves the way for exploiting the rich phenomenology of coherent effects in laser design, which has been hampered so far by the lack of a coherent ME formalism.

中文翻译：

激光对接的相干主方程。

Modelocked激光器构成了光学相干超短脉冲辐射的基本来源，对科学和技术产生了巨大影响。他们的模型很大程度上取决于1975年Hermann A. Haus提出的主方程（ME）方法。但是，当介质动力学很快并且最终与光物质量子相干相关时，该描述将失败。在这里，我们建立了一个严格而通用的ME框架，即连贯的ME（CME），它可以克服这两个限制。CME预测与Haus ME有很大的偏差，我们通过调幅半导体激光实验证实了这一点。考虑到相干效应，例如Risken-Nummedal-Graham-Haken多模不稳定性，我们设想CME在描述量子级联和量子点激光器中的自锁模和自发频率梳形成方面的有用性。此外，CME为在激光设计中利用丰富的相干效应现象学铺平了道路，迄今为止，由于缺乏相干的ME形式主义，该现象已受到阻碍。

更新日期：2020-01-16

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