Precision Metrology Using Coherent Transient Effects and Cold Atom Interferometry Based On Homebuilt, Auto-locked Laser Systems

使用基于自制自动锁定激光系统的相干瞬态效应和冷原子干涉测量的精密计量

• 批准号: RGPIN-2020-06114
• 负责人: Kumarakrishnan, Anantharaman
• 金额: $ 2.48万
• 依托单位: York University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=718240
• 关键词: Precision; Metrology; Using; Coherent; Transient

The invention of the laser has transformed our understanding of light-matter interactions, leading to revolutionary advances in fundamental science, and resulting in far-reaching technological breakthroughs. The applicant's group has developed a new class of low cost, homebuilt, vacuum-sealed, auto-locking laser systems (ALS) that can be frequency stabilized with respect to atomic, molecular, and temperature tunable solid-state frequency markers without human intervention. ALS technology has enabled the development of high power pulsed laser systems, control systems for opto-mechanical feedback, techniques for manipulation of laser intensity, frequency, and phase, and high-speed data acquisition systems. The deployment of ALS has transformed the applicant's research program and led to a series of rapidly evolving precision measurements relevant to atomic physics and industrial metrology. The overriding theme of this proposal is to realize applications of ALS by utilizing distinctive coherent transient techniques developed by the applicant in the following key areas: 1) Since ALS have outperformed widely established commercial laser systems that have been used for generations, they will be miniaturized so that portable units can be integrated into commercial gravimeters that are used for the non-invasive exploration of oil and natural gas, seismic monitoring of environmentally sensitive areas designated for resource extraction, and tidal forecasting. 2) ALS will be line narrowed by locking to external cavities so that they are suitable for state of the art, atom interferometric measurements of gravity using laser-cooled atoms. Such an ultracold atom sensor will used to certify industrial gravimeters that currently lack reliable means of calibration. 3) The phase noise of ALS will be characterized so that they can realize the most accurate measurements of atomic lifetimes using a particularly suitable and overlooked coherent transient technique. Such measurements will test theoretical calculations of atomic structure required to interpret parity non-conservation experiments that probe the standard model of physics. 4) Pulsed laser systems based on ALS will be used to develop, compare, and improve time domain magnetometers that can realize the most sensitive measurements of magnetic fields, and for achieving the most accurate measurements of diffusion coefficients that are required to understand the performance of magnetometers. Portable pulsed laser systems will be integrated with magnetometers used in airborne surveys for the detection of metal and mineral deposits, and used to develop versatile lidar systems that can operate over extended spectral ranges for environmental monitoring of atmospheric pollutants and trace gases. 5) Free space optical tweezers experiments that track kinematics of trapped particles on fast time scales will be developed for the rapid characterization and accurate mass determinations of contaminants and pathogens.

激光的发明改变了我们对光线相互作用的理解，从而导致了基本科学的革命进步，并带来了深远的技术突破。申请人组开发了一类新的低成本，自制，真空密封的自动锁定激光系统（ALS），可以相对于原子，分子和温度可调节的固态频率标记频率稳定，而无需人工干预。 ALS技术使高功率脉冲激光系统，用于光学机械反馈的控制系统，用于操纵激光强度，频率和相位的技术以及高速数据采集系统。 ALS的部署改变了申请人的研究计划，并导致了一系列与原子物理和工业计量学相关的快速发展的精确测量。该提案的重要主题是通过利用申请人在以下关键领域中开发的独特相干瞬态技术来实现ALS的应用：1）由于ALS已超过了已广泛建立的商业激光系统，这些系统已被用于几代人使用，因此可以将其用于不合时宜的环境，以便在商业环境中使用，以探索机油，以探索自然层次的机构，以供机油，以探索机构的域名。指定用于资源提取的敏感区域和潮汐预测。 2）ALS将通过锁定到外部空腔来缩小线条，以便使用激光冷原子对重力的原子干涉测量。这样的超低原子传感器将用于证明目前缺乏可靠校准手段的工业重量表。 3）ALS的相位噪声将被表征，以便他们可以使用一种特别合适且被忽略的相干瞬态技术实现原子寿命最准确的测量。这样的测量将测试解释探测物理标准模型的平等性非保守实验所需的原子结构的理论计算。 4）基于ALS的脉冲激光系统将用于开发，比较和改善时间域磁力计，以实现磁场最敏感的测量值，并实现最准确的测量扩散系数，以了解磁力计的性能所需的扩散系数。便携式脉冲激光系统将与用于检测金属和矿物沉积物的机载调查中使用的磁力计集成，并用于开发多功能激光雷达系统，该系统可以在扩展的光谱范围内运行，以用于对大气污染物和微量气体的环境监测。 5）将开发自由空间光学镊子在快速时间尺度上跟踪被困颗粒的运动学的实验，以快速表征和准确的污染物和病原体的质量确定。