Er3+/Ce3+ Co-doped Phosphosilicate Fiber for Extend the L-band Amplification

• Published in: Journal of lightwave technology Vol. 39; no. 18; pp. 5933 - 5938
• Main Authors: Lou, Yang, Chen, Yang, Gu, Zhimu, Qiu, Qiang, Shi, Chanjuan, He, Le, Xing, Yingbin, Peng, Jinggang, Li, Haiqing, Chu, Yingbo, Dai, Nengli, Li, Jinyan
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.09.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Amplification; Bandwidth; Bandwidths; Cerium; Data communication; Erbium; Erbium-doped fiber amplifiers; Glass; L-band; Optical fiber amplifiers; Optical fiber networks; optical fibers; Silicon compounds; ultra-wideband technology
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2021.3095340

Withthe advent of the 5G era, the demand for data communication is increasing explosively. Extending the L-band gain bandwidth is considered to be the most direct and effective approach to increasing communication capacity. However, the signal excited state absorption (SESA) prevents the L-band gain from extending to longer wavelength. In this report, Er 3+ and Ce 3+ are introduced into the phosphosilicate fiber to regulate the SESA. The results show that the addition of Ce3+ into the phosphosilicate fiber can weaken the effect of SESA and extend the L-band gain bandwidth. The SESA of the Er 3+ /Ce 3+ co-doped phosphosilicate fiber do not begin until 1620 nm, which is shifted and suppressed efficiently. The longest wavelength of the Er 3+ /Ce 3+ co-doped phosphosilicate fiber is extended to 1623 nm. This result provides an effective approach to realizing the extended L-band amplification.