Femtosecond fiber laser based methane optical clock

Gubin, M. A.; Kireev, A. N.; Konyashchenko, A. V.; Kryukov, P. G.; Shelkovnikov, A.; Tausenev, A. V.; Tyurikov, D A

doi:10.1007/s00340-009-3525-9

Cited by 30 publications

(11 citation statements)

References 22 publications

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“…With the developed MIR frequency comb source, and signal improvement techniques such as multipass [9] or cavity enhancement [7,8], as well as the development of a fast and sensitive MIR detector, several parts per trillion level of the detection sensitivity is possible. Many techniques can benefit from the developed MIR frequency comb source, such as frequency metrology and frequency standard [15], dual frequency comb spectroscopy [5,8,9], upconversion spectroscopy [10,11], and provide an ultrafast, highly sensitive platform for the gas detection and its applications. …”

Section: DCmentioning

confidence: 99%

“…If the pump and signal fields are phase coherent and originated from the same source, the generated idler field is carrier envelope phase slip free and requires only stabilization of the comb spacing, which is relatively easy to implement by stabilizing the source repetition rate. Hence it was shown to provide a frequency synthesizer in the MIR and can be used in frequency standard applications [15]. Several MIR sources based on DFG have been reported [12][13][14]; however in some cases involving Raman shifting the coherence was reduced and even lost [13].…”

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confidence: 99%

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High-power mid-infrared frequency comb source based on a femtosecond Er:fiber oscillator

et al. 2013

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We report on a high-power mid-infrared frequency comb source based on a femtosecond Er:fiber oscillator with a stabilized repetition rate at 250 MHz. The mid-infrared frequency comb is produced through difference frequency generation in a periodically poled MgO-doped lithium niobate crystal. The output power is about 120 mW with a pulse duration of about 80 fs, and spectrum coverage from 2.9 to 3.6 µm. The coherence properties of the produced high-power broadband mid-infrared frequency comb are maintained, which was verified by heterodyne measurements. As the first application, the spectrum of a ~200 ppm methane-air mixture in a short 20 cm glass cell at ambient atmospheric pressure and temperature was measured.Currently there is a large demand for gas detection systems in the mid-infrared (MIR) in many areas of science and technology. For these applications high repetition rate femtosecond lasers and frequency combs are being developed actively due to fast data acquisition rates, high sensitivity, and multi-target detection properties inherent of broadband frequency comb spectroscopy [1,2]. The 3 to 4 µm MIR range is of particular interest since it contains strong absorption features of the C-H stretching vibrational mode of methane (v3 band) and many other more complex hydrocarbons. For a multitude of measuring tasks in the booming natural gas industry, agriculture, atmospheric and geosciences researches, methane detection with real time monitoring, and quantifying different hydrocarbon isotopes are important [3,4]. In addition there is a growing interest to detect volatile organic compounds such as benzene, toluene and ethyl benzene, which are precursors of atmospheric nanoaerosols and can contribute to poor indoor air quality.Different versions of frequency comb spectroscopies have been developed since the invention of frequency comb [2,[5][6][7][8][9][10][11]. Broadband MIR frequency combs provide useful light sources for many spectroscopic applications. In particular, several MIR sources using single pass difference frequency generation (DFG) have been developed and are attractive because of their relative simplicity and the benefit of passive carrier-envelope offset frequency stabilization [12][13][14]. If the pump and signal fields are phase coherent and originated from the same source, the generated idler field is carrier envelope phase slip free and requires only stabilization of the comb spacing, which is relatively easy to implement by stabilizing the source repetition rate. Hence it was shown to provide a frequency synthesizer in the MIR and can be used in frequency standard applications [15]. Several MIR sources based on DFG have been reported [12][13][14]; however in some cases involving Raman shifting the coherence was reduced and even lost [13]. In addition, the available power levels have been moderate with about 1.5 mW at 4.7 µm having been reached [14].In this letter, we demonstrate a high-power MIR frequency comb source based on a femtosecond Er:fiber oscillator with a stabilized repetition ...

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Section: DCmentioning

confidence: 99%

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confidence: 99%

High-power mid-infrared frequency comb source based on a femtosecond Er:fiber oscillator

et al. 2013

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“…For frequency measurements from 87 to 90 THz the PPLN poling period was 29.9 μm, and from 90 to 92 THz it was 30.2 μm. There are a number of other approaches that can generate MIR combs [8,19,[34][35][36][37] both broader and brighter than the approach taken here, but more development of these sources is needed to establish the very low phase noise across the comb required for fully resolved and accurate, high-SNR dual-comb spectroscopy. A Ge wedge blocks the residual NIR light, leaving 30 μW of MIR light across 7500 teeth, or 4 nW per tooth.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy of the methaneν3band with an accurate midinfrared coherent dual-comb spectrometer

et al. 2011

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We demonstrate a high-accuracy dual-comb spectrometer centered at 3.4 μm. The amplitude and phase spectra of the P, Q, and partial R branches of the methane ν 3 band are measured at 25 to 100 MHz point spacing with resolution under 10 kHz and a signal-to-noise ratio of up to 3500. A fit of the absorbance and phase spectra yields the center frequency of 132 rovibrational lines. The systematic uncertainty is estimated to be 300 kHz, which is 10 −3 of the Doppler width and a 10-fold improvement over Fourier transform spectroscopy. These data quantify the accuracy and resolution achievable with direct comb spectroscopy in the midinfrared.

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“…In that case, the IR frequency is compared to a high-harmonic of the comb repetition rate with a sum or difference frequency generation in a non linear crystal and a Ti:Sa optical frequency comb. It has been demonstrated at 10 µm with a CO 2 laser [4], at 3.4 µm using a HeNe laser [5], and recently extended to quantum cascade lasers at 5 µm [6], and 3.4 µm using a fiber comb [7].…”

Section: -Km Optical Linkmentioning

confidence: 99%

Mid-IR frequency measurement using an optical frequency comb and a long-distance remote frequency reference

Chanteau

Lopez

Auguste

et al. 2012

2012 European Frequency and Time Forum

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We have built a frequency chain which enables to measure the absolute frequency of a laser emitting in the 28-31 THz frequency range and stabilized onto a molecular absorption line. The set-up uses an optical frequency comb and an ultrastable 1.55 µm frequency reference signal, transferred from LNE-SYRTE to LPL through an optical link. We are now progressing towards the stabilization of the mid-IR laser via the frequency comb and the extension of this technique to quantum cascade lasers. Such a development is very challenging for ultrahigh resolution molecular spectroscopy and fundamental tests of physics with molecules.I.

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Femtosecond fiber laser based methane optical clock

Cited by 30 publications

References 22 publications

High-power mid-infrared frequency comb source based on a femtosecond Er:fiber oscillator

High-power mid-infrared frequency comb source based on a femtosecond Er:fiber oscillator

Spectroscopy of the methaneν3band with an accurate midinfrared coherent dual-comb spectrometer

Mid-IR frequency measurement using an optical frequency comb and a long-distance remote frequency reference

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