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arXiv 2108.09653physics.optics
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二次谐波倍频的光谱压缩

Spectral compression by phase doubling in second harmonic generation

Xin Zeng, Shuzhen Cui, Xin Cheng, Yan Feng

摘要:

在二次谐波产生中,光场的相位被加倍,这具有重要的意义。本文利用倍频效应解决了单频激光器功率放大的一个长期难题。在高功率光纤放大器中,当对单频种子激光器进行(-π/2,π/2)二元相位调制以展宽频谱和抑制受激布里渊散射时,由于(-π/2,π/2)调制被加倍为(-π,π),相位调制后的二次谐波将恢复为单频。在实验中,由于电子带宽的限制,压缩率高达95%,这可以通过优化器件来提高。

英文摘要:

In second harmonic generation, the phase of the optical field is doubled which has important implication. Here the phase doubling effect is utilized to solve a long-standing challenge in power scaling of single frequency laser. When a (-π/2, π/2) binary phase modulation is applied to a single frequency seed laser to broaden the spectrum and suppress the stimulated Brillouin scattering in high power fiber amplifier, the second harmonic of the phase-modulated laser will return to single frequency, because the (-π/2, π/2) modulation is doubled to (-π, π) for the second harmonic. A compression rate as high as 95% is demonstrated in the experiment limited by the electronic bandwidth of the setup, which can be improved with optimized devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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