Switchable femtosecond and picosecond spatiotemporal mode-locked fiber laser based on NALM and multimode interference filtering effects

Wu, Jiawen; Liu, Guangxin; Gao, Yu-Xin; Lin, Xu-Bin; Hu, Chi‐Chang; Luo, Zhi‐Chao; Xu, Wen‐Cheng; Likhachev, Mikhail E.; Aleshkina, Svetlana S.; Mashinsky, Valery M.; Yashkov, Mikhail V.; Luo, Aiping

doi:10.1016/j.optlastec.2022.108414

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…High-energy short-pulse laser generation has been a current research hotspot due to its unique characteristics of short pulse duration and high peak power, which have good application prospects in fields including laser processing [1,2], laser ranging [3,4] and laser ignition [5,6]. At present, there are several methods for obtaining short-pulse lasers, such as Q-switched technology [7,8] and mode-locked technology [9][10][11]. Q-switched technology is used for generating high-energy short pulses with low cost, but it can only output subnanosecond pulses due to the size limitations of the gain medium imposed by the cavity length.…”

Section: Introductionmentioning

confidence: 99%

Pulse Duration Compression by Two-Stage Stimulated Brillouin Scattering and Stimulated Raman Scattering

Han,

Liu,

et al. 2024

Photonics

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A pulse duration compression technique that combines stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) was presented in this study, achieving an output pulse duration of 48.3 ps. The feasibility of this approach has been experimentally demonstrated. To be specific, a pulse duration of 7.4 ns is compressed to 48.3 ps with an energy of 5.27 mJ, and the energy efficiency of the SRS pulse duration compression system is up to 21.84%. Moreover, this study provides a practical method for reliably generating high-energy short pulses.

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Section: Introductionmentioning

confidence: 99%

Pulse Duration Compression by Two-Stage Stimulated Brillouin Scattering and Stimulated Raman Scattering

Han,

Liu,

et al. 2024

Photonics

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“…[ 19 ] In terms of negative‐dispersion regime, wavelength tunability in linear‐cavity STML fiber laser at 1.5

\umu

m was first reported. [ 20 ] Subsequently, Bound soliton [ 21 ] and switchable picosecond and femtosecond solitons [ 22 ] in Er‐doped STML fiber lasers have been observed based on multimode interference (MMI) saturable absorbers (SA). Recently, the possibility of the formation of multimode soliton in Er‐doped STML was discussed.…”

Section: Introductionmentioning

confidence: 99%

Beam Self‐Cleaning of 1.5 μ$\umu$m High Peak‐Power Spatiotemporal Mode‐Locked Lasers Enabled By Nonlinear Compression and Disorder

et al. 2023

Laser & Photonics Reviews

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The realization of beam self-cleaning in a cavity is more challenging than in the outside cavity. The peak power of intracavity pulses needs to be high to reach the threshold of beam self-cleaning, which usually relies on additional diffraction grating to compress pulses in a positive-dispersion cavity. Here, it is first experimentally and numerically demonstrated that self-cleaning can be observed in an all-fiber high peak-power Er-doped spatiotemporal mode-locked (STML) laser at all-negative-dispersion. Through the nonlinear compression of graded-index multimode fiber, the pulses are compressed along with the emergence of beam self-cleaning. Besides, the inherent disorder of multimode fiber accelerates the self-cleaning process. The intracavity pulse energy of ≈13 nJ with a pulse duration of 734.5 fs is derived under a highly multimode excitation, with an output pulse energy of 2.33 nJ. The pulse energy is a nearly fourfold improvement over the previous report in all-fiber STML at 1.5 𝛍m. Temporal-dependent characteristics and nonlinear polarization dynamics of beam self-cleaning are also experimentally uncovered. It is demonstrated that the STML fiber laser will enable new insights into nonlinear pulse propagation in cavities and related applications.

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“…To date, several research groups have demonstrated STML oscillators with all-fiber structures. [16][17][18][19][20][21][22][23] All of them are based on few-mode (˜3 modes) active fibers. The maximum average output power is at the level of hundreds of milliwatts.…”

Section: Introductionmentioning

confidence: 99%

Investigation of High‐Power Spatiotemporal Mode‐Locking with High Beam Quality

Zhang

Peng

et al. 2023

Laser & Photonics Reviews

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The developed spatiotemporal mode‐locked (STML) laser has emerged as an effective platform for investigating high‐dimensional nonlinear spatiotemporal dynamics. Additionally, it offers a novel avenue for the design of fiber oscillators capable of operating at high power levels. At present, the focus of STML laser research primarily revolves around this aspect. However, considering practical applications, there is a strong desire to conceive a simple all‐fiber STML oscillator with both high beam quality and high power. In this study, an all‐fiber, high‐power STML oscillator based on multimode fibers is constructed and investigated. By manipulating the pump power and the polarization state, the laser could operate in a dissipative soliton or noise‐like pulse regime, both with average output powers of two operation states reaching the Watt level. Simultaneously, high‐quality output beam profiles are observed in both operation states. To the best of knowledge, this is the first demonstration of high‐power spatiotemporal mode‐locking with high beam quality. The study holds great benefits for advancing the investigations of compact all‐fiber STML lasers which deliver high‐power outputs with superior beam quality and ultimately propels the application of STML lasers. Furthermore, this study contributes to the understanding of the behavior of STML lasers with high power.

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Switchable femtosecond and picosecond spatiotemporal mode-locked fiber laser based on NALM and multimode interference filtering effects

Cited by 14 publications

References 39 publications

Pulse Duration Compression by Two-Stage Stimulated Brillouin Scattering and Stimulated Raman Scattering

Pulse Duration Compression by Two-Stage Stimulated Brillouin Scattering and Stimulated Raman Scattering

Beam Self‐Cleaning of 1.5 μ$\umu$m High Peak‐Power Spatiotemporal Mode‐Locked Lasers Enabled By Nonlinear Compression and Disorder

Investigation of High‐Power Spatiotemporal Mode‐Locking with High Beam Quality

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