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Active phase stabilization, synchronization and phase locking of mode-locked Ti:sapphire lasers.

机译：锁模钛蓝宝石激光器的有源相位稳定，同步和锁相。

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摘要

This manuscript covers three main ideas: carrier - envelope phase stabilization, synchronization, and phase locking of Ti:sapphire lasers. In Chapter 1, I give a review of exactly what carrier - envelope phase stabilization means in both the time and frequency domains. I discuss various schemes to stabilize the carrier - envelope phase evolution in mode locked Ti:sapphire lasers along with some interesting examples of the technology.; In Chapter 2, I present preliminary experiments with the objective of synchronizing independent mode locked femtosecond lasers. The rms timing jitter between the two lasers is 4.3 fs, observed with a 1 ms averaging time over tens of seconds. With ∼3 microsecond averaging time, the rms timing jitter is 26 fs over tens of seconds. Novel multi-stage phase locked loops allow preservation of precision timing resolution over the maximum dynamic range of delay. Synchronization between two lasers of different repetition rates is also demonstrated.; Chapter 3 describes the work done on the generation of a synthetic optical pulse by coherently combining two independent mode locked lasers. This is done by first synchronizing the lasers, and then phase locking the comb offset frequency of the two combs. By red-shifting one laser, and blue-shifting the other, we are able to generate a larger coherent bandwidth by this technique. Coherence is demonstrated with a number of techniques is both time and frequency domains. Measurements reveal a synthesized pulse with a larger coherent bandwidth than either individual laser.; Chapter 4 represents a large step forward in our active synchronization technology. With improved electronics, better laser construction, and higher bandwidth servos, we find that the timing jitter between our independent mode locked femtosecond lasers to be 580 attoseconds with a 1 ms averaging time over several seconds. With 80 ns averaging time, we find the timing jitter to be only 1.75 fs over several seconds. We also demonstrate excellent repeatability and rapid arbitrary delay setting between the two lasers. The noise floor of the phase detector is the limiting factor achieving the lowest timing jitter.
机译：该手稿涵盖了三个主要思想：载体-Ti：蓝宝石激光器的包络相位稳定，同步和锁相。在第1章中，我将对时域和频域中的载波-包络相位稳定的确切含义进行回顾。我讨论了各种用于稳定载流子的模式-锁模Ti：蓝宝石激光器中的包络相演化以及该技术的一些有趣示例。在第2章中，我提出了初步实验，目的是同步独立锁模飞秒激光器。两个激光器之间的均方根时序抖动为4.3 fs，在几十秒内平均时间为1 ms。平均时间约为3微秒，均方根时序抖动在数十秒内为26 fs。新颖的多级锁相环可在最大的动态延迟范围内保持精确的定时分辨率。还说明了具有不同重复率的两个激光器之间的同步。第3章介绍了通过将两个独立的锁模激光器相干组合来产生合成光脉冲的工作。这是通过首先使激光器同步，然后锁相两个梳子的梳齿偏移频率来完成的。通过将一个激光器红移，而将另一个激光器蓝移，我们可以通过这种技术产生更大的相干带宽。在时域和频域均采用多种技术证明了一致性。测量表明，合成脉冲的相干带宽比任何单个激光器都大。第4章代表了我们的主动同步技术的一大进步。通过改进的电子设备，更好的激光器结构和更高带宽的伺服器，我们发现独立锁模飞秒激光器之间的定时抖动为580阿秒，平均时间为1毫秒，几秒钟。平均时间为80 ns，我们发现几秒钟内的时序抖动仅为1.75 fs。我们还展示了出色的可重复性和两个激光器之间的快速任意延迟设置。鉴相器的本底噪声是实现最低时序抖动的限制因素。

著录项

  • 作者

    Shelton, Robert Keith.;

  • 作者单位

    University of Michigan.;

  • 授予单位 University of Michigan.;
  • 学科 Physics Optics.; Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 121 p.
  • 总页数 121
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;无线电电子学、电信技术;
  • 关键词

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