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Pulse compression based on laser-induced optical breakdown in suspension is investigated. The physical mechanism behind it is analyzed theoretically and validated in the Q-switched Nd:YAG laser system. A 12-ns pump pulse is suppressed to 5ns With good fidelity in the front edge and sharp steepness in the trailing edge. The HT-270, which has a small gain coefficient and absorption coefficient, is used as a solvent, and therefore the disturbance induced by stimulated Brillouin scattering and absorption are minimized and the transmittivity is enhanced. 相似文献
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Measurement of stimulated Brillouin scattering (SBS) threshold based on waveform variation of SBS optical limiting 下载免费PDF全文
This paper proposes a method for measuring the stimulated
Brillouin scattering (SBS) threshold based on waveform variation of
SBS optical limiting. The output waveforms for different pump power
densities are numerically simulated, and validated in the Nd:YAG
seed-injected laser system. The results indicate that SBS does not
take place in the case of a low pump power density and thus the
output power scales up linearly with pump power. Once the pump power
density exceeds the SBS threshold, SBS takes place and thereby the
energies are transferred from pump to Stokes. As a result, a small
shoulder appears in the trailing edge of the output waveform, which
provides another method to determine the SBS threshold. 相似文献
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Investigation on the effect of beam divergence angle upon output waveform based on stimulated Brillouin scattering optical limiting 下载免费PDF全文
This paper investigates the effect of beam divergence angle on
output waveform based on stimulated Brillouin scattering optical
limiting. Output waveforms in the case of different pump divergence
angles are numerically simulated, and validated in a Nd:YAG
seed-injected laser system. The results indicate that a small pump
divergence angle can lead to good interaction between pump and
Stokes, and a platform can be easily realized in the transmitted
waveform. In contrast, a peak followed by the platform appears when
the divergence angle becomes large. 相似文献
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