Stabilized Lasers as Sensors and Frequency Standards

稳定激光器作为传感器和频率标准

• 批准号: 0217882
• 负责人: Jean-Claude Diels
• 金额: $ 27万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0217882&HistoricalAwards=false
• 关键词: Stabilized; Lasers; Sensors; Frequency; Standards

Mode-locked lasers can produce a comb of regularly spaced modes in frequency. We propose to investigate new approaches to stabilize frequency combs provided by mode-locked ring and linear solid state lasers, as well as locking the comb to an atomic standard. The stability is achieved by locking the frequency and repetition rates to a reference cavity. We have recently demonstrated that femtosecond laser stabilization to reference cavities provides an exceptionally fast feedback control to ensure stable operation on short time scales. Accuracy will be achieved by locking the reference cavity to atomic resonances provided by lambda (L) structures. A first part of the work will be an extension of our previous work involving Ti:sapphire mode-locked lasers, improving the present performances, and developing the methods and tools for long term stabilization and accuracy.In parallel, we will start the development of a compact system based on optical parametric oscillators, which has the advantages of orthogonal controls of wavelength and repetition rate, as well as offering access to a broad range of visible and infrared wavelengths.We will evaluate applications for these stabilized mode-locked lasers. In particular, the stabilized ring optical parametric oscillator will enable the measurement of phase shifts with a much better sensitivity than the value of 10-9 that we obtained with unstabilized ring lasers. A specific application is as a laser gyroscope that could be used for geodesic applications. Having at the end of the program simultaneously stabilized at least two independent mode-locked lasers, we will be able to study the synchronization of these lasers through injection lock-in. This will answer a question for ultrafast telecommunication: how much (or how little) optical power is required to phase lock two independent sources, once their modes coincide to a few Hz?

锁模激光器可以产生频率上规则间隔的模式的梳。我们建议研究新的方法来稳定锁模环形和线性固体激光器提供的频率梳，以及锁定到原子标准。 通过将频率和重复率锁定到参考腔来实现稳定性。 我们最近已经证明，飞秒激光稳定参考腔提供了一个非常快的反馈控制，以确保在短时间尺度上的稳定运行。 通过将参考腔锁定到由λ（L）结构提供的原子共振，将实现精确度。 第一部分的工作将是我们以前的工作的延伸，涉及钛：蓝宝石锁模激光器，提高目前的性能，并开发长期稳定和精度的方法和工具。在平行，我们将开始开发一个紧凑的系统的基础上的光学参量振荡器，它具有正交控制的波长和重复频率的优势，以及提供访问到一个广泛的可见光和红外波长。我们将评估这些稳定的锁模激光器的应用。 特别是，稳定的环形光参量振荡器将使相移的测量具有比我们用不稳定的环形激光器获得的10-9的值好得多的灵敏度。 一个具体的应用是作为激光陀螺仪，可用于测地线应用。在计划结束时，同时稳定了至少两个独立的锁模激光器，我们将能够通过注入锁定来研究这些激光器的同步。 这将回答超快通信的一个问题：一旦两个独立的源的模式重合到几Hz，需要多少（或多少）光功率来锁相？