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As seen in: Optica
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Articles

Kerr nonlinearity and the suppression of stimulated Brillouin scattering in narrow-linewidth high-power pulsed fiber amplifiers

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By Marc D. Mermelstein, MDM Optics
| Optica Verified
A numerical study is presented on the interaction of the Kerr nonlinearity and stimulated Brillouin scattering (SBS) in high-energy, high-peak-power, and narrow-linewidth pulsed Yb-doped fiber amplifiers. Numerical simulations demonstrate that for high-power nanosecond pulses, a strong Kerr-induced nonlinear phase shift generates a frequency sweep that exceeds the Brillouin gain bandwidth, thereby diminishing the SBS gain.
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SRS and interpulse power limits to the energy extraction from pulsed kW Yb-doped fiber amplifiers

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By Marc D. Mermelstein, MDM Optics
| Optica Verified
A space-time finite difference model is exercised to examine the performance of large mode area (LMA), high-power, Yb-doped pulsed fiber amplifiers. The simulations include forward and backward amplified spontaneous emission (ASE) and stimulated Raman scattering (SRS) and exhibit good agreement with experimental measurements.
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Material-dependent TMI and SBS threshold power simulations of Yb-doped fiber amplifiers

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By Marc D. Mermelstein, MDM Optics
| Optica Verified
The influence of engineered glass compositions for the enhancement of the TMI and SBS threshold powers in kW class Yb-doped fiber amplifiers is explored with validated simulations. A reduction in the thermo-optic coefficient and an increase in the thermal conductivity raises the TMI threshold power while the SBS threshold power is increased by a reduction in the Brillouin gain.
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