Frequency combs and precision spectroscopy of atomic hydrogen

2019 ◽  
pp. 142-215
Author(s):  
Thomas Udem
Keyword(s):  
High Resolution ◽  
Visible Light ◽  
Laser Spectroscopy ◽  
Quantum Electrodynamics ◽  
Atomic Hydrogen ◽  
Frequency Comb ◽  
Atomic Clock ◽  
Laser Frequency ◽  
High Resolution Spectroscopy ◽  
Frequency Combs

A laser frequency comb allows the phase coherent conversion of the very rapid oscillations of visible light of some 100s of THz down to frequencies that can be handled with conventional electronics. This capability has enabled the most precise laser spectroscopy experiments yet, which have allowed the testing of quantum electrodynamics, to determine fundamental constants and to construct an optical atomic clock. The chapter reviews the development of the frequency comb, derives its properties, and discusses its application for high resolution spectroscopy of atomic hydrogen.

A proposed laser frequency comb-based wavelength reference for high-resolution spectroscopy

2007 ◽  
Author(s):  
Steve Osterman ◽  
Scott Diddams ◽  
Matthew Beasley ◽  
Cynthia Froning ◽  
Leo Hollberg ◽  
...  
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
Laser Frequency ◽  
High Resolution Spectroscopy

scholarly journals High-resolution spectroscopy with a femtosecond laser frequency comb

2005 ◽  
Vol 30 (13) ◽  
pp. 1734 ◽  
Author(s):  
V. Gerginov ◽  
C. E. Tanner ◽  
S. A. Diddams ◽  
A. Bartels ◽  
L. Hollberg
Keyword(s):  
High Resolution ◽  
Femtosecond Laser ◽  
Frequency Comb ◽  
Laser Frequency ◽  
High Resolution Spectroscopy

Precision Mid-Infrared Frequency Comb Spectroscopy using a Cross-Dispersed Spectrometer

2021 ◽  
Author(s):  
D. Michelle Bailey ◽  
Gang Zhao ◽  
Adam J. Fleisher
Keyword(s):  
Frequency Comb ◽  
Difference Frequency Generation ◽  
Laser Frequency ◽  
Trace Gas ◽  
Molecular Fingerprint ◽  
Mid Infrared ◽  
Optical Frequency Combs ◽  
Frequency Combs ◽  
Infrared Spectral ◽  
Fingerprint Region

<p>Advances in optical technology have led to the commercialization and widespread use of broadband optical frequency combs for multiplexed measurements of trace-gas species. Increasingly available in the mid-infrared spectral region, these devices can be leveraged to interrogate the molecular fingerprint region where many fundamental rovibrational transitions occur. Here we present a cross-dispersed spectrometer employing a virtually imaged phased array etalon and ruled diffraction grating coupled with a difference frequency generation comb centered near 4.5 µm. The spectrometer achieves sub-GHz spectral resolution with a 30 cm<sup>-1</sup> instantaneous bandwidth. Laboratory results for nitrous oxide isotopic abundance retrieval will be presented. Challenges relating to characterizing the instrument lineshape function, constructing a frequency axis traceable to the comb, and accurate spectral modelling will be addressed and progress towards incorporating a more compact laser frequency comb source into the system will be discussed.</p>

High Harmonic Frequency Combs for High Resolution Spectroscopy

2009 ◽  
pp. 843-845
Author(s):  
A. Ozawa ◽  
J. Rauschenberger ◽  
Ch. Gohle ◽  
M. Herrmann ◽  
D. R. Walker ◽  
...  
Keyword(s):  
High Resolution ◽  
High Harmonic ◽  
High Resolution Spectroscopy ◽  
Harmonic Frequency ◽  
Frequency Combs

Real-time spectral interleaved electro-optic dual-comb spectroscopy

2020 ◽  
Author(s):  
Bingxin Xu ◽  
Xinyu Fan ◽  
Shuai Wang ◽  
Zuyuan He
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Figure Of Merit ◽  
Frequency Comb ◽  
Sampling Rate ◽  
Optical Metrology ◽  
Broad Bandwidth ◽  
Frequency Combs ◽  
Electro Optic ◽  
Spectral Sampling

Abstract Optical frequency comb with evenly spaced lines over a broad bandwidth has revolutionized the fields of optical metrology and spectroscopy. Here, we propose an electro-optic dual-comb spectroscopy to real-time interleave the spectrum with high resolution, in which two electro-optic frequency combs are seed by swept light source. An interleaved spectrum with a high resolution is real-time recorded by the sweeping probe comb without gap time, which is multi-heterodyne detected by the sweeping local comb. The proposed scheme measures a spectrum spanning 304 GHz in 1.6 ms with a resolution of 1 MHz, and reaches a spectral sampling rate of 1.9*108 points/s under Nyquist-limitation. A reflectance spectrum is measured with a calculated figure-of-merit of 4.2*108, which shows great prospect for fast and high-resolution applications.

Astronomical Laser Frequency Comb for High Resolution Spectrograph of a 2.16-m Telescope

2016 ◽  
Vol 36 (6) ◽  
pp. 0614001 ◽  
Author(s):  
吴元杰 Wu Yuanjie ◽  
叶慧琪 Ye Huiqi ◽  
韩建 Han Jian ◽  
邹璞 Zou Pu ◽  
傅凌统 Fu Lingtong ◽  
...  
Keyword(s):  
High Resolution ◽  
Frequency Comb ◽  
Laser Frequency
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