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Micromachines
Volume 15
Issue 5
10.3390/mi15050644
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Communication

A High-Energy, Wide-Spectrum, Spatiotemporal Mode-Locked Fiber Laser

by
Boyuan Ge
,
Yajun Lou
,
Silin Guo
,
Yue Cai
and
Xinhai Zhang
*
Department of Electrical Electronic and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
*
Author to whom correspondence should be addressed.
Micromachines 2024, 15(5), 644; https://doi.org/10.3390/mi15050644
Submission received: 16 April 2024 / Revised: 8 May 2024 / Accepted: 9 May 2024 / Published: 12 May 2024
(This article belongs to the Special Issue Fiber Lasers and Applications)
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Abstract

In this article, we demonstrate a high-energy, wide-spectrum, spatiotemporal mode-locked (STML) fiber laser. Unlike traditional single-mode fiber lasers, STML fiber lasers theoretically enable mode-locking with various combinations of transverse modes. The laser can deliver two different STML pulse sequences with different pulse widths, spectra and beam profiles, due to the different compositions of transverse modes in the output pulses. Moreover, we achieve a wide-spectrum pulsed output with a single-pulse energy of up to 116 nJ, by weakening the spectral filtering and utilizing self-cleaning. Strong spatial and spectral filtering are usually thought to be necessary for achieving STML. Our experiment verifies the necessity of spatial filtering for achieving STML, and we show that weakening unnecessary spectral filtering provides an effective way to increase the pulse energy and spectrum width of mode-locked fiber lasers.
Keywords: spatiotemporal mode-locking; pulsed fiber lasers; multimode fibers; beam self-cleaning effect spatiotemporal mode-locking; pulsed fiber lasers; multimode fibers; beam self-cleaning effect

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MDPI and ACS Style

Ge, B.; Lou, Y.; Guo, S.; Cai, Y.; Zhang, X. A High-Energy, Wide-Spectrum, Spatiotemporal Mode-Locked Fiber Laser. Micromachines 2024, 15, 644. https://doi.org/10.3390/mi15050644

AMA Style

Ge B, Lou Y, Guo S, Cai Y, Zhang X. A High-Energy, Wide-Spectrum, Spatiotemporal Mode-Locked Fiber Laser. Micromachines. 2024; 15(5):644. https://doi.org/10.3390/mi15050644

Chicago/Turabian Style

Ge, Boyuan, Yajun Lou, Silin Guo, Yue Cai, and Xinhai Zhang. 2024. "A High-Energy, Wide-Spectrum, Spatiotemporal Mode-Locked Fiber Laser" Micromachines 15, no. 5: 644. https://doi.org/10.3390/mi15050644

APA Style

Ge, B., Lou, Y., Guo, S., Cai, Y., & Zhang, X. (2024). A High-Energy, Wide-Spectrum, Spatiotemporal Mode-Locked Fiber Laser. Micromachines, 15(5), 644. https://doi.org/10.3390/mi15050644

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