宽带放大光纤研究进展及发展趋势

Research Progress and Development Trend of Broadband Amplified Optical Fiber

掺铒光纤放大器的出现是光纤通信领域颠覆性的技术突破,它使基于密集波分复用技术的超高速率、超大容量、超长距离光纤通信成为可能并促使其快速发展。光纤通信系统要实现长距离大容量通信必然离不开相应的光纤放大器。但是随着传输容量需求的爆发性增长,现有光纤通信系统面临巨大的扩容压力。本文系统综述了扩展增益带宽提升传输容量的研究进展,讨论了宽带放大光纤及其放大器发展所涉及的关键问题,提出了对超宽带放大光纤及其放大器发展趋势的理解,并对基于少模多芯光纤的空分复用技术研究进行了展望。

The erbium-doped fiber amplifier(EDFA)is a revolutionary breakthrough in the field of optical fiber communication,which makes long-distance,large-capacity,high-speed optical fiber communication possible.To realize long-distance transmission of optical fiber communication systems,it is inseparable from the corresponding optical fiber amplifier.However,with the explosive growth of transmission capacity demand,the existing DWDM communication system is facing huge pressure for capacity expansion.This paper systematically reviews the research progress of expanding the gain bandwidth to improve the transmission capacity,discusses the key issues involved in broadband active fibers and amplifiers,puts forward an understanding of ultra-broadband active fibers and their amplifiers in various bands,and provides a new perspective on future space division multiplexing based on few-mode multi-core fibers.