High gain and wideband hybrid optical amplifier using bismuth-doped and neodymium-doped fibers for E-band applications

Aleksandr Donodin; Leily Kiani; Shabnam Noor; Wladek Forysiak

doi:10.1038/s41598-025-05507-x

High gain and wideband hybrid optical amplifier using bismuth-doped and neodymium-doped fibers for E-band applications

Aleksandr Donodin^*
, Leily Kiani
, Shabnam Noor
, Wladek Forysiak

^*Corresponding author for this work

Lawrence Livermore National Laboratory

Research output: Contribution to journal › Article › peer-review

3 Citations (SciVal)

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Abstract

A hybrid dual-stage bismuth-doped fiber and neodymium-doped fiber amplifier with high optical gain and extended bandwidth of operation in the E-band is demonstrated. The amplifier features a maximum gain of 43 dB, output power of 372 mW, and a minimum noise figure of 5.5 dB, and operation wavelength range of 1397–1472 nm, enabled by 153-m of bismuth-doped fiber and two 7-m lengths of neodymium-doped fiber. The demonstration shows the possibility of achieving improved gain bandwidth by combining fiber amplifiers with overlapping gain spectra in the E-band.

Original language	English
Article number	20971
Number of pages	8
Journal	Scientific Reports
Volume	15
Issue number	1
Early online date	1 Jul 2025
DOIs	https://doi.org/10.1038/s41598-025-05507-x
Publication status	Published - Dec 2025

Bibliographical note

Copyright © The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.

Funding

This work was supported by UK EPSRC grants EP/R035342/1 and EP/V000969/1. Prepared by LLNL under contract DE-AC52-07NA27344. LLNL-JRNL-860588.

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10.1038/s41598-025-05507-xLicence: CC BY 4.0

High gain and wideband hybrid optical amplifier using bismuth-doped
Copyright © The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/.
Final published version, 2.06 MBLicence: CC BY 4.0

Cite this

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title = "High gain and wideband hybrid optical amplifier using bismuth-doped and neodymium-doped fibers for E-band applications",

abstract = "A hybrid dual-stage bismuth-doped fiber and neodymium-doped fiber amplifier with high optical gain and extended bandwidth of operation in the E-band is demonstrated. The amplifier features a maximum gain of 43 dB, output power of 372 mW, and a minimum noise figure of 5.5 dB, and operation wavelength range of 1397–1472 nm, enabled by 153-m of bismuth-doped fiber and two 7-m lengths of neodymium-doped fiber. The demonstration shows the possibility of achieving improved gain bandwidth by combining fiber amplifiers with overlapping gain spectra in the E-band.",

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High gain and wideband hybrid optical amplifier using bismuth-doped and neodymium-doped fibers for E-band applications

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