Liu Yue, Wu Wenwen, Zhang Xinping
Institute of Information Photonics Technology, Beijing University of Technology, Beijing 100124, P.R. China.
iScience. 2024 Mar 22;27(5):109426. doi: 10.1016/j.isci.2024.109426. eCollection 2024 May 17.
Organic lasers based on distributed feedback (DFB) microcavities have been extensively investigated. However, the application of these lasers is limited by their low output power and large beam divergence. Therefore, laser amplifiers are needed to achieve practically applicable laser intensity and controllable lasing modes for far-field applications. In this work, we report self-injection-locked laser amplifiers using the combination of a DFB microcavity and a Bragg reflector, where a high-reflection mirror acts as the Bragg reflector and its feedback supplies the external-cavity injection. The coherent coupling between the DFB microcavity and the Bragg amplifier is crucial for achieving high conversion efficiency and high-contrast transverse modes. An amplification factor larger than 20 and a single output laser spot with high contrast that has been achieved. Such an integration design of the self-injected DFB microcavity amplifier can be directly utilized in the realization of high-performance thin-film laser sources for practical applications.
基于分布反馈（DFB）微腔的有机激光器已得到广泛研究。然而，这些激光器的应用受到其低输出功率和大光束发散角的限制。因此，需要激光放大器来实现实际应用所需的激光强度和用于远场应用的可控激光模式。在这项工作中，我们报道了一种自注入锁定激光放大器，它使用了DFB微腔和布拉格反射器的组合，其中一个高反射镜充当布拉格反射器，其反馈提供外腔注入。DFB微腔和布拉格放大器之间的相干耦合对于实现高转换效率和高对比度横向模式至关重要。已经实现了大于20的放大倍数和具有高对比度的单输出激光光斑。这种自注入DFB微腔放大器的集成设计可直接用于实现高性能薄膜激光源以用于实际应用。
