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首页> 美国政府科技报告 >Spectral Purity and Sources of Noise in Femtosecond Demodulation THz Sources Driven by Ti:Sapphire Mode-Locked Lasers. Appendix 1: High Resolution Sub-Millimeter Spectroscopy Using Mode-Locked Laser Driven Electro-Optic Antennas
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Spectral Purity and Sources of Noise in Femtosecond Demodulation THz Sources Driven by Ti:Sapphire Mode-Locked Lasers. Appendix 1: High Resolution Sub-Millimeter Spectroscopy Using Mode-Locked Laser Driven Electro-Optic Antennas

机译：Ti：蓝宝石锁模激光器驱动的飞秒解调THz光源的光谱纯度和噪声源。附录1：使用锁模激光驱动的电光天线的高分辨率亚毫米光谱

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Direct measurements of the spectral purity in THz femtosecond demodulation sources are reported and compared to theory. Because these sources operate at very high harmonics (approximately 102 - 104) of the mode-lock frequency, a high spectral purity source is very dependent on a low jitter femtosecond laser. Conversely, the spectral content of the THz sources provides detailed information about timing jitter and stringent tests of models used to describe the jitter. We find that both the behavior of the central core and the noise skirts of the power spectrum of our sources can be quantitatively related to measured ripple and continuum amplitude noise on the Ar+ pump laser by use of modulation theory.

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