Abstract

Multipass cells offer a simple manner to enhance the sensitivity of dual-comb Fourier transform spectrometer. 1.5 µm spectra spanning 125 nm and exhibiting a noise-equivalent absorption coefficient of 4·10<sup>-9</sup>cm<sup>-1</sup>Hz<sup>-1/2</sup>are recorded within 63 µs.

© 2010 The Optical Society

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