Laser Spectroscopy and Frequency Combs

21st International Conference on Laser Spectroscopy

Hänsch, Theodor W.^1 ; Picqué, Nathalie^1

Max-Planck-Institute of Quantum Optics Hans-Kopfermann-str. 1 85748 Garching Germany Ludwig-Maximilian University, Faculty of Physics, Schellingstr. 4, 80799 Munich, Germany^1

关键词: Commercial instruments;    Emerging applications;    Fourier spectrometer;    Fundamental research;    Nonlinear spectroscopy;    Optical atomic clocks;    Satellite navigation;    Two-photon spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/467/1/012001/pdf
DOI  :  10.1088/1742-6596/467/1/012001

来源: IOP

【 摘 要 】

The spectrum of a frequency comb, commonly generated by a mode-locked femtosecond laser consists of several hundred thousand precisely evenly spaced spectral lines. Such laser frequency combs have revolutionized the art measuring the frequency of light, and they provide the long-missing clockwork for optical atomic clocks. The invention of the frequency comb technique has been motivated by precision laser spectroscopy of the simple hydrogen atom. The availability of commercial instruments is facilitating the evolution of new applications far beyond the original purpose. Laser combs are becoming powerful instruments for broadband molecular spectroscopy by dramatically improving the resolution and recording speed of Fourier spectrometers and by creating new opportunities for highly multiplexed nonlinear spectroscopy, such as two-photon spectroscopy or coherent Raman spectroscopy. Other emerging applications of frequency combs range from fundamental research in astronomy, chemistry, or attosecond science to telecommunications and satellite navigation.