The ability to measure and control the carrier–envelope phase (CEP) of few-cycle laser pulses is of paramount importance for both frequency metrology and attosecond science. Here, we present a phase meter relying on CEP-dependent photocurrents induced by circularly polarized few-cycle pulses focused between electrodes in ambient air. The new device facilitates compact, single-shot CEP measurements under ambient conditions and promises CEP tagging at repetition rates orders of magnitude higher than most conventional CEP detection schemes, as well as straightforward implementation at longer wavelengths.

中文翻译：

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环境空气中的单脉冲载波-包络相位测量

测量和控制短周期激光脉冲的载波-包络相位（CEP）的能力对于频率计量学和阿秒科学都至关重要。在这里，我们介绍了一种相位计，该相位计依赖于CEP依赖性光电流，该电流由聚焦在环境空气中的电极之间的圆极化几个周期脉冲感应。这种新设备有助于在环境条件下进行紧凑的单次CEP测量，并有望以比大多数传统CEP检测方案高几个数量级的重复率进行CEP标记，并可以在更长的波长上直接实施。