Versatile high-power monolithic all-glass fiber amplifier for pulsed signals with a wide range of repetition rates

Hossein Fathi; Ebrahim Aghayari; Andrey Grishchenko; Amit Yadav; Edik Rafailov; Regina Gumenyuk; Valery Filippov

doi:10.1038/s41598-025-28833-6

Versatile high-power monolithic all-glass fiber amplifier for pulsed signals with a wide range of repetition rates

Hossein Fathi, Ebrahim Aghayari, Andrey Grishchenko, Amit Yadav, Edik Rafailov, Regina Gumenyuk, Valery Filippov

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Abstract

This study presents a compact, high-power monolithic all-glass spun tapered double-clad fiber amplifier for single-stage amplification of narrow linewidth picosecond pulsed signals from a few tens of mW to several hundred watts of average power and MW level of peak power, covering a wide range of repetition rates. The absence of free-space elements in the amplifier module enhances its overall reliability by omitting the dependency on the pump alignment and internal back reflections. The versatile all-glass amplifier module delivers 50 ps pulses with over 2 MW peak power at 1 MHz, 50 ps pulses with over 625 W average power at 20 MHz, and 20 ps pulses with over 645 W average power at 1 GHz, all exhibiting excellent spectral, spatial, and polarization characteristics. This monolithic all-glass ultra-large mode area fiber amplifier is verified as a robust solution for direct amplification of short pulses attaining high peak/average power laser systems with excellent spectral, spatial, and polarization characteristics.

Original language	English
Article number	44919
Number of pages	11
Journal	Scientific Reports
Volume	15
Early online date	23 Nov 2025
DOIs	https://doi.org/10.1038/s41598-025-28833-6
Publication status	Published - 23 Nov 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

Part of this work has been supported by the European Commission Horizon2020 program (PULSE project- grant agreement Nr. 824996) and the Flagship for Photonics Research and Innovation (PREIN).

Funders	Funder number
Horizon 2020	824996

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10.1038/s41598-025-28833-6Licence: CC BY 4.0

Versatile high-power monolithic all-glass fiber amplifier for pulsed signals with a wide range of repetition rates_VoR
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, 4.88 MBLicence: CC BY 4.0

Cite this

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abstract = "This study presents a compact, high-power monolithic all-glass spun tapered double-clad fiber amplifier for single-stage amplification of narrow linewidth picosecond pulsed signals from a few tens of mW to several hundred watts of average power and MW level of peak power, covering a wide range of repetition rates. The absence of free-space elements in the amplifier module enhances its overall reliability by omitting the dependency on the pump alignment and internal back reflections. The versatile all-glass amplifier module delivers 50 ps pulses with over 2 MW peak power at 1 MHz, 50 ps pulses with over 625 W average power at 20 MHz, and 20 ps pulses with over 645 W average power at 1 GHz, all exhibiting excellent spectral, spatial, and polarization characteristics. This monolithic all-glass ultra-large mode area fiber amplifier is verified as a robust solution for direct amplification of short pulses attaining high peak/average power laser systems with excellent spectral, spatial, and polarization characteristics. ",

author = "Hossein Fathi and Ebrahim Aghayari and Andrey Grishchenko and Amit Yadav and Edik Rafailov and Regina Gumenyuk and Valery Filippov",

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Versatile high-power monolithic all-glass fiber amplifier for pulsed signals with a wide range of repetition rates

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