**Ping Zhao**

Dr. Ping Zhao received the B.Sc. and Ph.D. degrees from Huazhong University of Science and Technology in 2009 and 2014, respectively. After doctoral graduation, he joined in Huawei Technologies Co Ltd. as a senior research engineer in advanced optical communication technologies. With 5 years'industrial research experience, he joined the Photonics Lab in Chalmers University of Technology in 2019 as a researcher. He realized the first continuous-wave phase-sensitive amplifier based on CMOS-compatible integrated photonic waveguides with a noise figure well below the conventional 3 dB quantum limit of phase-insensitive amplifiers, which was selected by Optica (Formerly OSA) as "Optics in 2022". His research topics include micro/nanophotonic devices, nonlinear optics, optical communication and advanced laser manufacturing. To date, he authored/coauthored 20 journal and conference papers as well as 10 granted PCT patents. He received H.C. Oersted & Marie Skłodowska-Curie COFUND Fellowship and is in the topical advisory panel of *Micromachines* and a reviewer of various international journals including *Optics Letters*, *Optics Express* and *Journal of the Optical Society of America B*.

**Jie Yin 1,2,\* , Yang Liu <sup>3</sup> and Ping Zhao <sup>4</sup>**


Laser-based additive manufacturing (LAM) is a revolutionary advanced digital manufacturing technology developed in recent decades, which is also a key strategic technology for technological innovation and industrial sustainability. This technology unlocks the design and constraints of traditional manufacturing and meets the needs of complex geometry fabrication and high-performance part fabrication. A deeper understanding of the design, materials, processes, structures, properties and applications is desired to produce novel functional devices, as well as defect-free structurally sound and reliable LAM parts.

The topics in this Special Issue include macro- and micro-scale additive manufacturing with lasers, such as structure/material design, fabrication, modeling and simulation, in situ characterization of additive manufacturing processes and ex situ materials characterization and performance, with an overview that covers various applications in aerospace, biomedicine, optics and energy.

In this Special Issue, papers on different subjects were published after the high-quality reviewing process, with a total of 16 contributions (14 original research papers and 2 review papers) and times of viewed over 13K (as of 15 November 2022). Six articles were selected as Editor's Choice and one article was selected as the Issue Cover of Volume 13, Issue 8 (https://www.mdpi.com/2072-666X/13/8 (accessed on 25 August 2022)). Each of them is briefly introduced below according to four aspects (design, processes, materials and applications) of laser additive manufacturing in this Special Issue.
