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 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.

DOI: 10.1126/science.aam7424

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@article{Link2017DualcombSO, title={Dual-comb spectroscopy of water vapor with a free-running semiconductor disk laser.}, author={S M Link and D J H C Maas and Dominik Waldburger and U Keller}, journal={Science}, year={2017}, volume={356 6343}, pages={1164-1168} }