3D printing provides tremendous opportunities for developing new integrated systems in optics and photonics. The additional degree of freedom in the z-direction makes it an irreplaceable prototyping, fabrication and manufacturing tool.
In this manuscript in Materials Today, EPD researchers review the various methods of 3D printing techniques available for optics and photonics, the associated materials and applications. Advancements in the achievable resolution in 3D printing enables sub-micron feature sized waveguides, resonators, prisms, lenses, and gratings to be manufactured or rapidly prototyped with three dimensional features. The trajectory of innovations in 3D printing technologies and materials for optics and photonics would accelerate their transition from component level development to systems level integration.
You can find the article at https://www.sciencedirect.com/science/article/pii/S1369702123002122