Dual-comb spectroscopy of water vapor with a free-running semiconductor disk laser

Dual-comb spectroscopy offers the potential for high accuracy combined with fast data acquisition. Applications are often limited, however, by the complexity of optical comb systems. Here we present dual-comb spectroscopy of water vapor using a substantially simplified single-laser system. Very good...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2017-06, Vol.356 (6343), p.1164-1168
Main Authors: Link, S. M., Maas, D. J. H. C., Waldburger, D., Keller, U.
Format: Article
Language:English
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Summary:Dual-comb spectroscopy offers the potential for high accuracy combined with fast data acquisition. Applications are often limited, however, by the complexity of optical comb systems. Here we present dual-comb spectroscopy of water vapor using a substantially simplified single-laser system. Very good spectroscopy measurements with fast sampling rates are achieved with a free-running dual-comb mode-locked semiconductor disk laser. The absolute stability of the optical comb modes is characterized both for free-running operation and with simple microwave stabilization. This approach drastically reduces the complexity for dual-comb spectroscopy. Band-gap engineering to tune the center wavelength from the ultraviolet to the mid-infrared could optimize frequency combs for specific gas targets, further enabling dual-comb spectroscopy for a wider range of industrial applications.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.aam7424