&gt;2 kW High Stability Robust Fiber Cladding Mode Stripper With Moderate Package Temperature Rising

Liu, Yu; Huang, Shan; Wu, Wenjie; Zhao, Pengfei; Tang, Xuan; Feng, Xi; Li, Min; Shen, Biao; Song, Huaqing; Tao, Rumao; Wang, Jianjun

doi:10.1109/lpt.2020.3011592

Cited by 14 publications

(4 citation statements)

References 19 publications

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“…According to [24], M 2 should be less than 1.1 when LP11 is 3%, which is less than the measured M 2 . This is because of the presence of residual cladding signal light due to the limited stripping efficiency of CPS [27], which was not considered during mode decomposition.…”

Section: Resultsmentioning

confidence: 99%

Power scaling of high-power linearly polarized fiber lasers with <10 GHz linewidth

Chu

Shu

et al. 2023

Front. Phys.

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In this work, an all-fiberized polarization-maintained (PM) fiber laser has been demonstrated with a near-top-hat-shaped spectrum. By optimizing the modulation signal to generate near-top-hat-shaped spectrums, a 3-kW PM fiber laser has been achieved at <10 GHz linewidth with the polarization extinction ratio of 96% and beam quality of 1.156, which is the highest output power ever reported with approximately 10 GHz linewidth, and further scaling of output power is limited by stimulated Brillouin scattering. By decomposing the mode content, the proportion of the fundamental mode in the output laser is above 97%. The stimulated Raman scattering suppression ratio reaches 62 dB at the maximal output power.

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Section: Resultsmentioning

confidence: 99%

Power scaling of high-power linearly polarized fiber lasers with <10 GHz linewidth

Chu

Shu

et al. 2023

Front. Phys.

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“…A 50 W fiber-pigtailed 976 nm laser diode (LD) was used to pump the oscillator. A homemade cladding light stripper (CLS) was used to strip the residual pump light and cladding signal light [8]. An isolator (ISO) was used to block off the backward light from the main amplifier and protect the oscillator.…”

Section: Methodsmentioning

confidence: 99%

SRS-Induced Spatial-Spectral Distortion and Its Mitigation Strategy in High-Power Fiber Amplifiers

Zhang

Xie

et al. 2022

IEEE Photonics J.

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The spatial-spectral evolution properties of laser beam in the presence of stimulated Raman scattering (SRS) effect have been studied in large mode area (LMA) fiber. With the employment of long/short pass filters, spatial evolution of the signal and Raman light has been studied individually. After the onset of SRS, the simultaneous optimizing of signal light and degrading of Raman light was observed, which has been attributed to the SRS effect of multimode laser beams in LMA fiber. The spectral evolution characteristics indicated that the SRS effect in LMA fiber will trigger other nonlinear effects, mainly inter-modal four-wave-mixing effect and cross-phase-modulation induced modulation instability. Furthermore, the impacts of bending strategy and multimode LMA fiber on SRS-induced spatialspectral distortion have also been studied, which shows that the SRS-induced mode distortion can be suppressed by increasing the fiber size while the bending strategy plays a limited role.

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“…However, considering the excessive length of CPS is not conducive to nonlinear suppression, another report revealed a possible solution of 1.01 kW by employing continuous gradient chemical etching, in which a CPS of only 150 mm was utilized [186]. The highest power extraction experimentally demonstrated recently showed a cladding power stripping ability of up to 2.16 kW through merely 200 mm of package length [187,188]. These advances in CPSs indicate the feasibility to meet the requirements of 10-kilowatt-level applications.…”

Section: Cladding Power Stripper (Cps)mentioning

confidence: 99%

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

et al. 2022

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The success of high-power fiber lasers is fueled by maturation of active and passive fibers, combined with the availability of high-power fiber-based components. In this contribution, we first overview the enormous potential of rare-earth doped fibers in spectral coverage and recent developments of key fiber-based components employed in high-power laser systems. Subsequently, the emerging functional active and passive fibers in recent years, which exhibit tremendous advantages in balancing or mitigating parasitic nonlinearities hindering high-power transmission, are outlined from the perspectives of geometric and material engineering. Finally, novel functional applications of conventional fiber-based components for nonlinear suppression or spatial mode selection, and correspondingly, the high-power progress of function fiber-based components in power handling are introduced, which suggest more flexible controllability on high-power laser operations. Graphical abstract

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>2 kW High Stability Robust Fiber Cladding Mode Stripper With Moderate Package Temperature Rising

Cited by 14 publications

References 19 publications

Power scaling of high-power linearly polarized fiber lasers with <10 GHz linewidth

Power scaling of high-power linearly polarized fiber lasers with <10 GHz linewidth

SRS-Induced Spatial-Spectral Distortion and Its Mitigation Strategy in High-Power Fiber Amplifiers

Functional Fibers and Functional Fiber-Based Components for High-Power Lasers

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