Frequency-comb infrared spectrometer for rapid, remote chemical sensing

Schließer, Albert; Brehm, M.; Keilmann, F.; Weide, Daniel W. van der

doi:10.1364/opex.13.009029

Cited by 349 publications

(224 citation statements)

References 16 publications

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“…Over 50 years since its inception, FTS remains relevant and continues to find new applications, in part, because of its continual refinement. The recent advances in spectroscopy using dual frequency combs offers an interesting new approach to FTS [1][2][3][4][5][6][7][8][9]. This dual-comb spectroscopy approach can also be viewed as a form of infrared time-domain spectroscopy (TDS) analogous to THz TDS [10][11][12] , or as a massively parallel multiheterodyne laser spectrometer [13].…”

Section: Introductionmentioning

confidence: 99%

Coherent dual-comb spectroscopy at high signal-to-noise ratio

2010

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Two coherent frequency combs are used to measure the full complex response of a sample in a configuration analogous to a dispersive Fourier transform spectrometer, infrared time domain spectrometer, or a multiheterodyne laser spectrometer. This dual comb spectrometer retains the frequency accuracy and resolution of the reference underlying the stabilized combs. We discuss the specific design of our coherent dual-comb spectrometer and demonstrate the potential of this technique by measuring the overtone vibration of hydrogen cyanide, centered at 194 THz (1545 nm). We measure the fully normalized, complex response of the gas over a 9 THz bandwidth at 220 MHz frequency resolution yielding 41,000 resolution elements. The average spectral signal-to-noise ratio (SNR) over the 9 THz bandwidth is 2,500 for both the magnitude and phase of the measured spectral response and the peak SNR is 4,000. This peak SNR corresponds to a fractional absorption sensitivity of 0.05% and a phase sensitivity of 250 microradians. As the spectral coverage of combs expands, coherent dual-comb spectroscopy could provide high frequency accuracy and resolution measurements of a complex sample response across a range of spectral regions.Work of U.S. government, not subject to copyright.

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Section: Introductionmentioning

confidence: 99%

Coherent dual-comb spectroscopy at high signal-to-noise ratio

2010

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“…OCIS codes: (320.5540) Pulse shaping; (320.7100) Ultrafast Measurements; (070.7145) Ultrafast processing; (060.0060) Fiber optics and optical communications; (130.3990) Micro-optical devices Optical frequency combs consisting of periodic discrete spectral lines with fixed frequency positions are powerful tools for high precision frequency metrology, spectroscopy, broadband gas sensing, optical clocks, and other applications [1][2][3][4][5][6][7]. Frequency combs generated in mode locked lasers can be self-referenced to have both stabilized optical frequencies and repetition rates (with repetition rates below ~1 GHz in most cases) [8].…”

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confidence: 99%

Spectral line-by-line pulse shaping of on-chip microresonator frequency combs

et al. 2011

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We report, for the first time to the best of our knowledge, spectral phase characterization and line-by-line pulse shaping of an optical frequency comb generated by nonlinear wave mixing in a microring resonator. Through programmable pulse shaping the comb is compressed into a train of near-transform-limited pulses of ≈ 300 fs duration (intensity full width half maximum) at 595 GHz repetition rate. An additional, simple example of optical arbitrary waveform generation is presented. The ability to characterize and then stably compress the frequency comb provides new data on the stability of the spectral phase and

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“…Fields that use this tool range from precision metrology 1 (development of frequency standards 2 and high-precision sensing, such as gravitometry 3 ) to trace analysis 4 and chemical sensing 5 . Characterizing and manipulating particles using light is also the foundation of modern fields such as quantum optics 6 , computing 7 and information processing 8,9 .…”

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confidence: 99%

Forbidden atomic transitions driven by an intensity-modulated laser trap

2015

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Spectroscopy is an essential tool in understanding and manipulating quantum systems, such as atoms and molecules. The model describing spectroscopy includes the multipole-field interaction, which leads to established spectroscopic selection rules, and an interaction that is quadratic in the field, which is not often employed. However, spectroscopy using the quadratic (ponderomotive) interaction promises two significant advantages over spectroscopy using the multipole-field interaction: flexible transition rules and vastly improved spatial addressability of the quantum system. Here we demonstrate ponderomotive spectroscopy by using optical-lattice-trapped Rydberg atoms, pulsating the lattice light and driving a microwave atomic transition that would otherwise be forbidden by established spectroscopic selection rules. This ability to measure frequencies of previously inaccessible transitions makes possible improved determinations of atomic characteristics and constants underlying physics. The spatial resolution of ponderomotive spectroscopy is orders of magnitude better than the transition frequency would suggest, promising single-site addressability in dense particle arrays for quantum computing applications.

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Frequency-comb infrared spectrometer for rapid, remote chemical sensing

Cited by 349 publications

References 16 publications

Coherent dual-comb spectroscopy at high signal-to-noise ratio

Coherent dual-comb spectroscopy at high signal-to-noise ratio

Spectral line-by-line pulse shaping of on-chip microresonator frequency combs

Forbidden atomic transitions driven by an intensity-modulated laser trap

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