Frequency stabilization of a primary subterahertz oscillator by a frequency comb of a femtosecond laser

Tretyakov, M.Yu.; Shkaev, A. P.; Kiselev, A. M.; Bodrov, S. B.; Андрианов, А. В.; Makarov, D. S.

doi:10.1134/s0021364010050048

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…In this article, we report dual THz comb spectroscopy with free-running dual lasers by modifying the adaptive sampling technique for THz comb. Dual THz-comb-referenced spectrum analysers [17][18][19][20][21][22] are effectively used to generate an adaptive sapling clock for dual THz comb spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers

Yasui

Ichikawa

Hsieh

et al. 2015

Sci Rep

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Terahertz (THz) dual comb spectroscopy (DCS) is a promising method for high-accuracy, high-resolution, broadband THz spectroscopy because the mode-resolved THz comb spectrum includes both broadband THz radiation and narrow-line CW-THz radiation characteristics. In addition, all frequency modes of a THz comb can be phase-locked to a microwave frequency standard, providing excellent traceability. However, the need for stabilization of dual femtosecond lasers has often hindered its wide use. To overcome this limitation, here we have demonstrated adaptive-sampling THz-DCS, allowing the use of free-running femtosecond lasers. To correct the fluctuation of the time and frequency scales caused by the laser timing jitter, an adaptive sampling clock is generated by dual THz-comb-referenced spectrum analysers and is used for a timing clock signal in a data acquisition board. The results not only indicated the successful implementation of THz-DCS with free-running lasers but also showed that this configuration outperforms standard THz-DCS with stabilized lasers due to the slight jitter remained in the stabilized lasers.

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Section: Introductionmentioning

confidence: 99%

Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers

Yasui

Ichikawa

Hsieh

et al. 2015

Sci Rep

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“…A small Rydberg excitation volume was formed using a crossed-beam geometry [12]. The two pulsed laser beams were focused to a waist of 9−10 µm in diameter and intersected at right angles inside the cold atom cloud.…”

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confidence: 99%

“…Microwave spectroscopy was applied for diagnostics of the electromagnetic fields in the excitation volume: dc electric field was calibrated with 0.2% uncertainty using Stark spectroscopy of the microwave transition 37P 3/2 → 37S 1/2 ; MOT magnetic field was not switched off, but the microwave probing allowed us to align the excitation point to a nearly zero magnetic field [12].…”

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confidence: 99%

Observation of the Stark-Tuned Förster Resonance between Two Rydberg Atoms

et al. 2010

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Cold atoms in highly excited Rydberg states are promising candidates to implement quantum logic gates of a quantum computer via long-range dipole-dipole interaction. Two-qubit gates require a controlled interaction of only two close Rydberg atoms. We report on the first spectroscopic observation of the resonant dipole-dipole interaction between two cold rubidium Rydberg atoms confined in a small laser excitation volume. The interaction strength was controlled by fine-tuning of the Rydberg levels into a Förster resonance using the Stark effect. The observed resonance line shapes are in good agreement with numerical Monte Carlo simulations.

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“…The possibility of primary subterahertz oscillator frequency phase-locking against down-converted femtosecond laser frequency comb was demonstrated in our previous paper. 12 The current paper reports on the operating specimen of the subterahertz synthesized radiation source built using the mentioned technique (a backward wave oscillator (BWO) was used as a primary source). Precise digital frequency control of the constructed synthesizer is illustrated by means of step-by-step recording of a narrow response curve of the Fabri-Perot resonator near the eigenfrequency of the transverse electromagnetic mode TEM 00q .…”

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confidence: 99%

“…The optical frequency comb is generated by a Ti:sapphire femtosecond laser with a wavelength of $790 nm, pulse length $50 fs, average laser power $100 mW, and pulse repetition rate $92 MHz. 12 The pulse repetition rate of the femtosecond laser is stabilized by the phase-locked loop against a radiofrequency synthesizer. The drift of the pulse repetition rate f pulse in usual conditions is mainly caused by variation of the pulse path optical length due to the thermal expansion of the optical elements.…”

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confidence: 99%

Femtosecond laser comb based subterahertz synthesizer

Makarov

Tretyakov

Shkaev

et al. 2014

Applied Physics Letters

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Frequency stabilization of a primary subterahertz oscillator by a frequency comb of a femtosecond laser

Cited by 9 publications

References 16 publications

Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers

Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers

Observation of the Stark-Tuned Förster Resonance between Two Rydberg Atoms

Femtosecond laser comb based subterahertz synthesizer

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