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21 papers
Supercontinuum generation in angle-etched diamond waveguides
Amirhassan Shams-Ansari, Pawel Latawiec, Yoshitomo Okawachi +8
We experimentally demonstrate on-chip supercontinuum generation in the visible region in angle etched diamond waveguides. We measure an output spectrum spanning 670 nm to 920 nm in…
Frequency comb spectroscopy
Nathalie Picqué, Theodor W. Hänsch
A laser frequency combs is a broad spectrum composed of equidistant narrow lines. Initially invented for frequency metrology, such combs enable new approaches to spectroscopy over…
Mid-infrared feed-forward dual-comb spectroscopy at 3 m
Zaijun Chen, Theodor W. Hänsch, Nathalie Picqué
Mid-infrared high-resolution spectroscopy has proven an invaluable tool for the study of the structure and dynamics of molecules in the gas phase. The advent of frequency combs adv…
Doppler-free Fourier transform spectroscopy
Samuel A. Meek, Arthur Hipke, Guy Guelachvili +2
The feasibility of sub-Doppler broadband multi-heterodyne spectroscopy with two laser frequency combs is demonstrated with two-photon excitation spectra of the 5S-5D transitions of…
A phase-stable dual-comb interferometer
Zaijun Chen, Ming Yan, Theodor W. Hänsch +1
Improvements to dual-comb interferometers will benefit precision spectroscopy and sensing, distance metrology, tomography, telecommunications etc. A specific requirement of such in…
Dual-Comb Coherent Raman Spectroscopy with Lasers of 1-GHz Pulse Repetition Frequency
Kathrin J. Mohler, Bernhard J. Bohn, Ming Yan +2
We extend the technique of multiplex coherent Raman spectroscopy with two femtosecond mode-locked lasers to oscillators of a pulse repetition frequency of 1 GHz. We demonstrate spe…