Yanhua Luo

By Shuen Wei, Mingjie Ding, Desheng Fan, Yanhua Luo, Jianxiang Wen and Gang-Ding Peng

Bismuth-doped and bismuth/erbium co-doped optical fibres have attracted much attention for their great potential in the photonic applications at ultrawide O, E, S, C and L bands. The effects of post treatments, including various heating, high energy ray radiation, laser radiation and H2 loading processes, on these fibres’ performance, functionality and stability have been experimentally studied. Experimental results demonstrate that these post treatments could allow us to get insights regarding the formation and the structure of bismuth active centre (BAC) and be used to control and regulate the formation of BAC.

Part of the book: Bismuth

By Bowen Zhang, Mingjie Ding, Shuen Wei, Binbin Yan, Gang-Ding Peng, Yanhua Luo and Jianxiang Wen

Bismuth-doped optical fiber (BDF) and bismuth/erbium co-doped optical fiber (BEDF) have attracted much attention due to their ultra-broadband luminescence in the near-infrared (NIR) region. The photobleaching effect on bismuth active centers (BACs) related to the NIR luminescence has been systematically investigated and summarized, in terms of irradiation intensity, irradiation wavelength, and temperature. All these findings not only give the deep insights into the fundamental structure of BACs but also provide an effective way to control the BACs. They play an important role for the development of BDF- and BEDF-based devices with high performance and stability under laser exposure in future.

Part of the book: Bismuth

By Yanhua Luo, Jianxiang Wen and Jianzhong Zhang

Part of the book: Bismuth

By Yushi Chu, Liling Dong, Yanhua Luo, Jianzhong Zhang and Gang-Ding Peng

Optical waveguides play an important role in both scientific research and industrial applications. Additive manufacturing (AM) or three-dimensional (3D)-printing technology has great potential to revolutionize manufacturing of optical waveguides. AM offers a great opportunity in developing optical waveguides demanding new material compositions and structure designs for functionalities needed in fast-evolving modern applications such as Internet of things (IoT). These demands have become so diverse and sophisticated that the traditional waveguide manufacturing cannot meet. In this chapter, we briefly introduce optical fibers one of the most common typical optical waveguides and present the process and perspective of optical fiber fabrication by AM technology.

Part of the book: Hybrid Planar