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arXiv 1403.0508physics.optics
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高非线性光纤中四波混频下变频实现毫米波和太赫兹锁相

Optoelectronic down-conversion by four-wave mixing in a highly nonlinear fiber for millimeter-wave and THz phase-locking

Antoine Rolland, Lucien Pouget, Marc Brunel, Mehdi Alouini

摘要:

太赫兹光拍音到射频中频的光电下变频是用标准马赫-曾德尔调制器和零色散斜率光纤进行的。通过四波混频获得的两个交错的光谱被示出为包含超过75个谐波,使得能够方便地恢复在770 GHz的拍音在500 MHz左右的相位噪声。这种四波混频下变频技术在双频固体激光器中实现,以便将其168 GHz拍音直接锁相到10 MHz本地振荡器。

英文摘要:

Optoelectronic down-conversion of a THz optical beatnote to a RF intermediate frequency is performed with a standard Mach-Zehnder modulator followed by a zero dispersion-slope fiber. The two interleaved optical spectra obtained by four-wave mixing are shown to contain more than 75 harmonics enabling to conveniently recover the phase noise of a beatnote at 770 GHz at around 500 MHz. This four-wave mixing down-conversion technique is implemented in a two-frequency solid-state laser in order to directly phase-lock its 168 GHz beatnote to a 10 MHz local oscillator.

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