A laser frequency comb allows the conversion of the very rapid oscillations of visible light of some 100’s of THz down to frequencies that can be handled with conventional electronics. This capability has enabled the most precise laser spectroscopy experiments yet and found a variety of scientific and technical applications. Among them are stringent tests of quantum electrodynamics, the determination of fundamental constants and the search for possible slow changes of these constants. Using an optical frequency reference in combination with a laser frequency comb has made it possible to construct all optical atomic clocks, which are now outperforming even the best cesium atomic clocks. In future direct frequency comb spectroscopy might enable high resolution laser spectroscopy in the extreme ultraviolet for the first time. Frequency combs are also used to calibrate astronomical spectrographs and might reach an accuracy that is sufficient to observe the change of the expansion rate of the universe in real time.

© 2013 IEICE

PDF Article
More Like This
Novel Frequency Combs for Applications Beyond the Optics Lab

Ronald Holzwarth
WC3 Advanced Solid-State Photonics (ASSP) 2009

Optical Frequency Combs for Space Applications

M. Giunta, M. Lezius, Ch. Deutsch, T. Wilken, T.W. Hänsch, A. Kohfeldt, A. Wicht, V. Schkolnik, M. Krutzik, H. Duncker, O. Hellmig, K. Lampmann, A. Wenzlawski, P. Windpassinger, K. Sengstock, A. Peters, and R. Holzwarth
STh4H.5 CLEO: Science and Innovations (CLEO_SI) 2016

Frequency Combs in Telecommunications Applications

Nikola Alic
FM3C.6 Frontiers in Optics (FiO) 2014


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access Optica Member Subscription