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首页> 外文会议>2013 Conference on Lasers and Electro-Optics Europe amp; International Quantum Electronics Conference >Direct carrier-envelope phase control of an amplified laser system
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Direct carrier-envelope phase control of an amplified laser system

机译：放大激光系统的直接载波包络相位控制

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Carrier-envelope control is one of the key technologies for attosecond pulse generation. Although the timing jitter between the carrier and the envelope has recently been demonstrated down to sub-10-attosecond range [1], CEP control is still limited to a rather narrow class of lasers, including Ti:sapphire and some other selected broadband laser materials. Typically, stabilization of a CPA laser source relies on an intricate combination of two servo loops, a fast oscillator loop and a slow amplifier loop [2]. While the second loop partially removes residual phase drift in the amplifier, unfortunately, it also corrupts the residual phase noise in the amplified pulse train due to the limited feedback bandwidth [3]. While oscillators can nowadays be stabilized down to −10 mrad residual CEP jitter, a 100 mrad stability for an amplified laser source is already a challenge. Here we demonstrate a direct method to stabilize the CEP of an Yb:KGW MOP A laser system, resulting in sub-100 mrad stability. To the best of our knowledge, this value surpasses most previously measured CEP jitter for Ti:sapphire CPA systems as well as any previous attempt to stabilize Yb-based oscillator and amplifier systems [4]. This is a crucial step in widening the utility of amplifier femtosecond Yb sources, which are easily scalable in average power and pulse energy but could not be meaningfully employed in attosecond optics until now, given the difficulty of their CEP control.
机译：载波包络控制是产生阿秒脉冲的关键技术之一。尽管最近已经证明了载波与包络之间的定时抖动可降至亚秒级10 ats以下[1]，但CEP控制仍仅限于相当窄的激光器类别，包括Ti：蓝宝石和某些其他选定的宽带激光器材料。通常，CPA激光源的稳定取决于两个伺服环路，快速振荡器环路和慢速放大器环路的复杂组合[2]。尽管第二环路部分地消除了放大器中的残留相位漂移，但不幸的是，由于有限的反馈带宽，它也破坏了放大脉冲序列中的残留相位噪声[3]。虽然如今振荡器可以稳定到-10 mrad的残留CEP抖动，但放大激光源的100 mrad稳定性已经是一个挑战。在这里，我们演示了一种稳定Yb：KGW MOP A激光系统CEP的直接方法，可产生低于100 mrad的稳定性。据我们所知，该值超过了先前为Ti：蓝宝石CPA系统测得的CEP抖动，以及任何先前稳定基于Yb的振荡器和放大器系统的尝试[4]。这是扩大放大器飞秒Yb光源效用的关键步骤，飞秒Yb光源在平均功率和脉冲能量上很容易扩展，但鉴于其CEP控制的困难，直到现在才可以在阿秒光学系统中有意义地使用。

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