Near-diffraction-limited linearly polarized narrow-linewidth random fiber laser with record kilowatt output

Xu, Jiangming; Huang, Long; Jiang, Man; Ye, Jun; Ma, Pengfei; Leng, Jinyong; Wu, Jian; Zhang, Hanwei; Zhang, Pu

doi:10.1364/prj.5.000350

Cited by 51 publications

(16 citation statements)

References 33 publications

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“…High-power narrow-linewidth fiber lasers with excellent beam quality have been highly desired for spectral and coherent beam combinations [1][2][3]. The power scaling of single-mode narrow-linewidth fiber lasers has been under intense investigations [4][5][6][7][8][9][10][11][12][13][14][15]. This mainly involves comprehensive suppressions of the transverse mode instabilities (TMI) and nonlinear inelastic scattering effects, such as stimulated Brillouin scattering (SBS) and stimulated Raman scattering (SRS) [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

All-fiberized and narrow-linewidth 5 kW power-level fiber amplifier based on a bidirectional pumping configuration

Liu

et al. 2021

High Pow Laser Sci Eng

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In this paper, an all-fiberized and narrow-linewidth 5 kW power-level fiber amplifier is presented. The laser is achieved based on the master oscillator power amplification (MOPA) configuration, in which the phase-modulated single-frequency laser is applied as the seed laser and bidirectional pumping configuration is applied in the power amplifier. The stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS), and transverse mode instability (TMI) effects are all effectively suppressed in the experiment. Consequently, the output power is scaled up to 4.92 kW with a slope efficiency of as high as ~ 80%. The 3 dB spectral width is about 0.59 nm, and the beam quality is measured to be M 2 ~ 1.22 at maximum output power. Furthermore, we have also conducted detail spectral analysis on the spectral width of the signal laser, which reveals that the spectral wing broadening phenomenon could lead to the obvious decrease of the spectral purity at certain output power. Overall, this work could provide a well reference for obtaining and optimizing high-power narrow-linewidth fiber lasers.

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Section: Introductionmentioning

confidence: 99%

All-fiberized and narrow-linewidth 5 kW power-level fiber amplifier based on a bidirectional pumping configuration

Liu

et al. 2021

High Pow Laser Sci Eng

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“…(13)- (15), the iterative block diagram for solving Eqs. (5) and 6is shown in Fig. 2, which includes two loop bodies: "loop body one" is to obtain accuracy power distributions using given boundary conditions, and "loop body two" is to find the correct boundary conditions that satisfy Eq.…”

Section: Solution For the Ultrafast Convergent Power-balance Modelmentioning

confidence: 99%

“…Raman random fiber laser (RRFL) combines the features of nano-particle based random lasers [1] with easy fabrication and simple configuration, and those of conventional Raman fiber lasers with wavelength agility [2,3] and high efficiency [4][5][6], attracting extensive attention in recent years [7][8][9][10]. RRFL was first proposed in 2010 by using a long telecommunication fiber [11], which naturally shows advantages in the field of long-distance distributed amplification [12,13], and remotely point sensing [14,15].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast convergent power-balance model for Raman random fiber laser with half-open cavity

Lin¹,

Wang²,

Araújo³

et al. 2020

Opt. Express

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The power-relevant features of Raman random fiber laser (RRFL), such as lasing threshold, slope efficiency, and power distribution, are among the most critical parameters to characterize its operation status. In this work, focusing on the power features of the half-open cavity RRFL, an ultrafast convergent power-balance model is proposed, which highlights the physical essence of the most common RRFL type and sharply reduces the computation workload. By transforming the time-consuming serial calculation to a parallel one, the calculation efficiency can be improved by more than 100 times. Particularly, for different point-mirror reflectivities and different fiber lengths, the input-output power curves and power distribution curves calculated by the present model match nicely with those of the conventional model, as well as with the experimental data. Moreover, through the present model the relationship between point-mirror reflectivity and laser threshold is analytically derived, and the way for improving RRFL's slope efficiency is also provided with a lucid theoretical explanation.

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“…RFL makes use of Rayleigh scattering (RS) to produce random distributed feedback (RDFB) and stimulated Raman scattering (SRS) to provide amplification, demonstrating the most obvious features of cavity-free and mode-less 2 . Over recent years, RFLs have drawn a great deal of attention, and gradually lead to the realization of high power 3 , 4 , narrow-linewidth 5 – 7 , multi-wavelength 8 , 9 and linearly polarized operation 7 , 10 , 11 . Thanks to the good laser performance and relative simplicity of implementation, RFLs have attracted a large variety of applications, such as frequency doubling to the visible range 12 , sensing and telecommunication 13 – 15 , pump source in mid-infrared laser and supercontinuum light source 16 – 19 , and stable seed for high power fiber master oscillator power amplifier (MOPA) 20 , 21 .…”

Section: Introductionmentioning

confidence: 99%

Flexible spectral manipulation property of a high power linearly polarized random fiber laser

Song

et al. 2018

Sci Rep

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Fiber lasers with flexible spectral manipulation property could provide a flexible tool for scenes where the temporal coherence property accounts, for example, coherent sensing/communication and nonlinear frequency conversion. Due to the good laser performance and relative simplicity of implementation, random fiber lasers (RFLs) based on random distributed feedback and Raman gain have earned more and more attention in the past few years, and a variety of RFLs with substantially different spectral properties have been developed. In this presentation, we demonstrate a high power linearly polarized RFL with flexible spectral manipulation property, in which the central wavelength and the linewidth of the spectrum can be tuned independently through a bandwidth-adjustable tunable optical filter (BA-TOF). The central wavelength of the RFL can be continuously tuned from 1095 to 1115 nm, while the full width at half-maximum (FWHM) linewidth has a maximal tuning range from ~0.6 to more than 2 nm. Moreover, the output power of 1102.5–1112.5 nm reaches ~23 W with polarization extinction ratio (PER) value > 20 dB. To the best of our knowledge, this is the first demonstration of a powerful linearly polarized RFL with both wavelength and linewidth tunability.

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Near-diffraction-limited linearly polarized narrow-linewidth random fiber laser with record kilowatt output

Cited by 51 publications

References 33 publications

All-fiberized and narrow-linewidth 5 kW power-level fiber amplifier based on a bidirectional pumping configuration

All-fiberized and narrow-linewidth 5 kW power-level fiber amplifier based on a bidirectional pumping configuration

Ultrafast convergent power-balance model for Raman random fiber laser with half-open cavity

Flexible spectral manipulation property of a high power linearly polarized random fiber laser

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