This Joint Issue of Optics Express and Optical Materials Express features 15 articles written by authors who participated in the international online conference Advanced Solid State Lasers held 13–16 October, 2020. This review provides a summary of the conference and these articles from the conference which sample the spectrum of solid state laser theory and experiment, from materials research to sources and from design innovation to applications.

中文翻译：

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焦点问题简介：2020年高级固态激光器

本期《光学快报》和《光学材料快报》刊登了15篇文章，这些文章的作者参加了2020年10月13日至16日举行的国际在线会议“先进固态激光器”。这篇综述提供了会议摘要以及会议中的这些文章。从材料研究到资源，从设计创新到应用，从固态激光器理论和实验的光谱中取样。