933 W Yb-doped fiber ASE amplifier with 504 nm bandwidth

Yan, Ping; Sun, Junyi; Li, Dan; Wang, Xuejiao; Huang, Yusheng; Gong, Mali; Xiao, Qirong

doi:10.1364/oe.24.019940

Cited by 23 publications

(5 citation statements)

References 24 publications

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“…This is because when the pump light power is relatively low, the short wavelength ASE light will be reabsorbed as the pump light of the long wavelength ASE light, and the spectrum shows that the ASE light is concentrated in the long wavelength. With the increase in pump power, sufficient pump light can inhibit the reabsorption and make the ASE light at short wavelength increase rapidly, resulting in the overall ASE widening and the center wavelength shifting blue [22]. When the pump power is 7 W, the ASE spectrum is obtained by changing the length of the YDF to 3 m, 5 m, 7 m and 9 m, as shown in figure 3(b).…”

Section: Simulationmentioning

confidence: 99%

High power narrow linewidth fiber laser based on superfluorescent white noise modulation

Shan,

Hou,

et al. 2024

Laser Phys.

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High power narrow linewidth fiber lasers have important applications in the fields of national defense, military and industrial intelligent manufacturing. At present, the power enhancement of narrow linewidth lasers is limited by the nonlinear and thermal effects of fiber, among which the stimulated Brillouin scattering (SBS) effect is highly destructive due to its low threshold. The SBS effect is easily produced using a single frequency laser as the seed of a high power narrow linewidth laser directly. The Brillouin scattering threshold can be effectively increased by broadening the spectrum line at a single frequency. A spectral broadening technique for single frequency lasers based on superfluorescent white noise modulation was proposed. The broadband characteristics of the amplified spontaneous emission light source to generate noise voltage on the photodetector was employed, and the lithium niobate electro-optical modulator was driven to perform broadband phase modulation in a single frequency laser. The phase modulation broadening of the single frequency laser was carried out using superfluorescent white noise. Different linewidth broadening effects of single frequency lasers were realized by changing the amplitude of the white noise. An experimental platform of the four-stage main oscillation power amplification structure was built, and a high power narrow linewidth laser with output power of 2 kW and spectral linewidth of 0.15 nm (10 dB) was realized, which effectively inhibited the SBS effect of the laser.

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Section: Simulationmentioning

confidence: 99%

High power narrow linewidth fiber laser based on superfluorescent white noise modulation

Shan,

Hou,

et al. 2024

Laser Phys.

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“…Thus, the nanosecond fiber seed generated by externally modulated SFS can resolve the temporal instability issues associated with the resonant cavity structure-based nanosecond fiber seed. However, demonstrations of high-power SFS amplifiers have predominantly focused on continuous-wave SFSs [22][23][24][25][26] , with reports on pulsed SFS amplifiers featuring high average power and large pulse energy being relatively scarce. Park et al [19] reported a narrowband nanosecond superfluorescent fiber source (ns-SFS) with an average power of 41.5 W, pulse energy of about 0.4 mJ and pulse width of 26.4 ns, while pulsed SFS amplifiers delivering average power at the hundred-watt level and pulse energy at the approximately 10 mJ level have yet to be reported.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the stimulated Raman scattering effect in high-power nanosecond superfluorescent fiber source

Ning,

Zou,

et al. 2023

High Pow Laser Sci Eng

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In this work, we experimentally investigate the dependence of the stimulated Raman scattering (SRS) effect on the seed linewidth of a high-power nanosecond superfluorescent fiber source (ns-SFS). The results reveal that the SRS in the ns-SFS amplifier is significantly influenced by the full width at half maximum (FWHM) of the ns-SFS seed, and there is an optimal FWHM linewidth of 2 nm to achieve the lowest SRS in our case. The first-order SRS power ratio increases rapidly when the seed's linewidth deviates from the optimal FWHM linewidth. By power scaling the ns-SFS seed with the optimal FWHM linewidth, a narrowband all-fiberized ns-SFS amplifier is achieved with a maximum average power of 602 W, pulse energy of 24.1 mJ and corresponding peak power of 422.5 kW. This is the highest average power and pulse energy achieved for all-fiberized ns-SFS amplifiers to the best of our knowledge.

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“…In 2015, Xu et al obtained a kW-level SFS with 3 dB linewidth of ~8.1 nm through two stages of fiber amplifiers [12]. In 2016, Yan et al reported a 933 W SFS with 3 dB linewidth of as wide as ~50.4 nm by further performing nonlinear propagation in passive fiber [13]. In 2018, Xu et.al achieved a 3.14 kW SFS through tandem pump, and this is the highest reported output power in the fields of SFSs [14].…”

Section: Introductionmentioning

confidence: 99%

All-fiberized linearly polarized superfluorescent fiber source with 5 kW power output

Chen,

Ren,

Liu

et al. 2023

Appl. Opt.

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A superfluorescent fiber source (SFS) is a special fiber source that commonly possesses high temporal stability and a wide spectral linewidth. In this work, an all-fiberized linearly polarized SFS with, to our knowledge, record output power and near-diffraction-limited beam quality is presented. Up to 5.03 kW SFS is achieved at a pump power of 6.18 kW with a corresponding conversion efficiency of ∼81.1%. At maximum output power, the signal-to-noise ratio to background spectral noise is over 50 dB, the polarization extinction ratio is ∼17dB, and the beam quality factor is M x 2=1.49, M y 2=1.44. Further comparisons confirm the power scalability of fiber amplifiers employing SFSs as seed lasers. Overall, this work could provide a good reference for potential exploration of high-power fiber laser systems.

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933 W Yb-doped fiber ASE amplifier with 504 nm bandwidth

Cited by 23 publications

References 24 publications

High power narrow linewidth fiber laser based on superfluorescent white noise modulation

High power narrow linewidth fiber laser based on superfluorescent white noise modulation

Experimental investigation of the stimulated Raman scattering effect in high-power nanosecond superfluorescent fiber source

All-fiberized linearly polarized superfluorescent fiber source with 5 kW power output

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