Abstract:
In recent years, with the rapid development of optical communication, integrated circuits, and optoelectronic devices, the demand for micro-nano optical waveguides in various fields is increasing dramatically. The fabrication materials of optical waveguides determine their properties significantly, so exploring diverse suitable materials has become a hot spot in the field of optical materials. Based on the classification of optical waveguide materials, the advantages and applications of optical waveguides made of polymer, organic crystal molecules and semiconductor are introduced respectively. The rare earth doped micro/nano optical waveguide is mainly introduced from two aspects.On the one hand,by changing the excitation power and adjusting the light transmission distance, the red-green ratio of the emitted light can be controlled and the coupling efficiency of the light can be increased.On the other hand,the propagation modes of rare-earth doped optical waveguides with different morphologies are summarized, and the unique emission modes are analyzed by changing the excitation modes, such as the incident angle of the excitation laser. Finally, with the innovation of fabrication materials and control methods, optical waveguides of different materials play their unique advantages in various fields. Rare-earth doped micro/nano optical waveguides still have great development prospects in optical loss, coupling efficiency, emission mode and other aspects.