Optical parametric oscillator for molecular spectroscopy

用于分子光谱的光学参量振荡器

• 批准号: 440461823
• 金额: --
• 依托单位: Heinrich-Heine-Universität Düsseldorf
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/440461823?language=en
• 关键词: Optical; parametric; oscillator; molecular; spectroscopy

The optical parametric oscillator applied for shall be used for different purposes:Research Project I: Precision Measurement of Rotation-Vibration Transitions in Hydrogen MoleculesPrecision spectroscopy of rotational-vibration transition frequencies in hydrogen molecules opens a new approach to several fundamental constants (Rydberg constant, mass ratios of deuteron to proton, electron to proton, proton charge radius, deuteron charge radius, and quadrupole moment of deuteron). The optical parametric oscillator is required (i) for the internal state preparation of hetero- and homonuclear hydrogen molecules, (ii) for non-destructive read-out of the state of heteronuclear molecule ions using a novel method, and (iii) for conducting feasibility studies on novel (electrically dipole-forbidden) transitions.The obtained results are completely independent from complementary measurements of proton, deuteron and electron masses with Penning traps, as well as from hydrogen and deuterium spectroscopy. Thus hydrogen molecular ion spectroscopy is an important verification of these measurements and improves the consistency and probably also the accuracy of the fundamental constants.In addition, hydrogen molecular ions are also test systems that can be used to test novel techniques, which can then be transferred to other molecular ions.Research Project II: Studies on optical materials for monolithic optical resonatorsIn the future, systematic measurements of the optical absorption of silicon crystals in the near and mid infrared range are planned (1.4 to 4.0 µm, emission range of the requested optical parametric oscillator), both at room and cryogenic temperatures. The aim is to identify crystals of different manufacturers and associated wavelengths with very low absorption losses. Once a suitable material has been identified, a monolithic resonator is designed, constructed, operated and characterized under suitable vacuum conditions.A passive monolithic resonator opens up new possibilities for fundamental physics. It can be used to detect a time-dependent (hypothetical) fundamental field coupling to the fine structure constant. Dark matter could contain such fields.

申请的光学参量振荡器应用于不同的目的：研究项目一：氢分子转振跃迁的精密测量氢分子转振跃迁频率的精密光谱学为几个基本常数（里德伯常数、氘核与质子的质量比、电子与质子的质量比、质子电荷半径、氘核电荷半径、氘核四极矩）开辟了新的途径。光学参量振荡器是（i）用于制备异质和同质氢分子的内态，（ii）用于使用新方法非破坏性读出异质分子离子的状态，以及（iii）用于对新的异质分子离子进行可行性研究所必需的。（电偶极禁戒）跃迁。所获得的结果是完全独立于互补测量的质子，氘和电子质量与潘宁陷阱，以及从氢和氘光谱。因此，氢分子离子光谱学是这些测量的重要验证，并提高了基本常数的一致性和可能的准确性。此外，氢分子离子也是测试新技术的测试系统，可以用于测试新技术，然后可以转移到其他分子离子。研究项目二：单片光学谐振器光学材料的研究今后，计划对硅晶体在近红外和中红外范围内的光吸收进行系统的测量（1.4至4.0 µm，要求的光学参量振荡器的发射范围），在室温和低温下。目的是识别不同制造商的晶体和具有非常低吸收损耗的相关波长。一旦确定了合适的材料，就可以在合适的真空条件下设计、构造、操作和表征单片谐振器。无源单片谐振器为基础物理学开辟了新的可能性。它可以用来检测耦合到精细结构常数的依赖于时间的（假设的）基本场。暗物质可能包含这样的场。