啁啾脉冲功率谱与脉冲信噪比
POWER SPECTRUM AND SIGNAL-NOISE RATIO OF CHIRPED PULSE
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摘要: 啁啾脉冲放大(CPA)技术的关键在于提高高功率短脉冲的信噪比。分析了典型的光纤-光栅展宽脉冲的理想压缩特性,考察由逆傅氏变换相联系的啁啾脉冲功率谱I(ω)与理想压缩脉冲I(t)关系式,提出通过谱整形等方法消除功率谱调制使之具有理想外形是获得高信噪比的基本方法。Abstract: The development of chirped -pulse amplification (CPA) technique requires to optimize CPA for the production of high power ultrashort light pulses with low pedestal. In an ideal CPA system, compressed pulse will be determined solely by the power spectrum of the amplified pulse. The temporal pulse shape I (t) can be given by the power spectrum I (ω). It's shown that I (ω) of Gaussian spectral lineshape without modulation may produce clean, high contrast pulses.
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Key words:
- chirped-pulse amplification /
- power spectrum /
- signal -to -noise ratio
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