Quantum Dot‐Doped Optical Fibers

Gain medium‐doped active optical fibers for optical amplification and long‐range transmission have triggered a lot of researches. Traditional rare‐earth ion‐doped active fibers have non‐adjustable emissions, narrow band luminescence, limited gain enhancement, and other challenges. The unique optical properties of quantum dots (QDs) can further improve the doped optical fibers in the light amplification capacity, temperature sensitivity and to gain a broad‐spectrum coverage and lower laser threshold and other superiorities. However, there are few systematic discussions on the development of the technologies and applications of those QD‐doped optical fibers. In this review, the optical properties, temperature characteristics and optical amplification mechanisms of QD‐doped optical fibers are outlined. Then, the preparation technologies and the applications of QD‐doped optical fibers are highlighted. Additionally, the existing challenges and future development prospects of QD‐doped optical fibers are discussed. A variety of preparation methods for QD‐doped optical fibers are summarized. The application areas of QD‐doped optical fibers, as well as the implementation methods and features are also introduced. Finally, with a comprehensive description of the current status of QD‐doped optical fibers, it is predicted that QD‐doped optical fibers will expand their applications and break through new fields.