Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Guelachvili, Guy"'
Publikováno v:
Optics Letters 43, 162-165 (2018)
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 rubidium vapor.
Comment: 5 pages, 2 figures
Comment: 5 pages, 2 figures
Externí odkaz:
http://arxiv.org/abs/1706.02974
Autor:
Ideguchi, Takuro, Holzner, Simon, Yan, Ming, Guelachvili, Guy, Hänsch, Theodor W., Picqué, Nathalie
We demonstrate a novel technique of coherent Raman spectroscopy with a femtosecond laser. We apply to a molecular sample a sequence of pairs of ultrashort excitation and probe pulses, with a linearly increasing time delay between the two pulses from
Externí odkaz:
http://arxiv.org/abs/1403.3814
We characterize a new mid-infrared frequency comb generator based on difference frequency generation around 3.2 microns. High power per comb mode (>10-7 W/mode) is obtained over a broad spectral span (>700 nm). The source is used for direct absorptio
Externí odkaz:
http://arxiv.org/abs/1302.6270
Autor:
Ideguchi, Takuro, Holzner, Simon, Bernhardt, Birgitta, Guelachvili, Guy, Picqué, Nathalie, Hänsch, Theodor W.
Publikováno v:
Nature 502, 355-358 (2013)
Optical spectroscopy and imaging of microscopic samples have opened up a wide range of applications throughout the physical, chemical, and biological sciences. High chemical specificity may be achieved by directly interrogating the fundamental or low
Externí odkaz:
http://arxiv.org/abs/1302.2414
Publikováno v:
Optics Letters 37, 4847-4849 (2012)
Dual-comb spectroscopy is extended to the visible spectral range with a set-up based on two frequency-doubled femtosecond ytterbium-doped fiber lasers. The dense rovibronic spectrum of iodine around 19240 cm-1 is recorded within 12 ms at Doppler-limi
Externí odkaz:
http://arxiv.org/abs/1208.4454
Autor:
Ideguchi, Takuro, Bernhardt, Birgitta, Guelachvili, Guy, Hänsch, Theodor W., Picqué, Nathalie
Publikováno v:
Optics Letters 37, 4498-4500 (2012)
We report on the first demonstration of nonlinear dual-frequency-comb spectroscopy. In multi-heterodyne femtosecond Raman-induced Kerr-effect spectroscopy, the Raman gain resulting from the coherent excitation of molecular vibrations by a spectrally-
Externí odkaz:
http://arxiv.org/abs/1208.1145
Publikováno v:
Nature Communications 5, 3375 (2014)
With the advent of laser frequency combs, coherent light sources that offer equally-spaced sharp lines over a broad spectral bandwidth have become available. One decade after revolutionizing optical frequency metrology, frequency combs hold much prom
Externí odkaz:
http://arxiv.org/abs/1201.4177
Autor:
Bernhardt, Birgitta, Ozawa, Akira, Jacquet, Patrick, Jacquey, Marion, Kobayashi, Yohei, Udem, Thomas, Holzwarth, Ronald, Guelachvili, Guy, Hänsch, Theodor W., Picqué, Nathalie
The sensitivity of molecular fingerprinting is dramatically improved when placing the absorbing sample in a high-finesse optical cavity, thanks to the large increase of the effective path-length. As demonstrated recently, when the equidistant lines f
Externí odkaz:
http://arxiv.org/abs/0908.1928
Molecular fingerprinting through absorption spectroscopy is a powerful analytical method. Wide spectral ranges are explored with Doppler-limited resolution. Fast data acquisition, accurate measurements of frequency, intensity, and line shape; time-re
Externí odkaz:
http://arxiv.org/abs/0803.1255
Publikováno v:
Optics Letters 33, 3 (2008) 285-287
Supercontinua generated in highly non-linear fibers by ultrashort-pulse lasers can be used for high resolution Fourier transform absorption spectroscopy. The practical advantages of these bright ultrabroadband light sources for spectroscopy are repor
Externí odkaz:
http://arxiv.org/abs/0711.3853