All-solid-state rapidly tunable coherent 6-10 μm light source for lidar environmental sensing

Saito, Norihito; Yumoto, Masaki; Tomida, T.; Takagi, Utako; Wada, Satoshi

doi:10.1117/12.977170

Cited by 9 publications

(2 citation statements)

References 16 publications

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“…Two other collaborations, the FAMU collaboration at RAL (UK) [20,[29][30][31] and another one at J-PARC (Japan) [32][33][34], are also aiming at a precision measurement of the HFS in µp. For all three experimental collaborations, the main challenge is posed by the small laserinduced transition probability resulting from the small matrix element (magnetic dipole-type transition, M 1), in conjunction with a transition wavelength at 6.8 µm where no adequate (sufficiently powerful) laser technologies are available, and the large volume where µp atoms A negative muon beam is stopped in a H 2 gas target at cryogenic temperatures, pressures of about 1 bar, and a thickness of about 1 mm.…”

Section: Introductionmentioning

confidence: 99%

Laser excitation of the 1s-hyperfine transition in muonic hydrogen

et al. 2022

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The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen (\muμp) with 1 ppm accuracy by means of pulsed laser spectroscopy to determine the two-photon-exchange contribution with 2\times10^{-4}2×10−4 relative accuracy. In the proposed experiment, the \muμp atom undergoes a laser excitation from the singlet hyperfine state to the triplet hyperfine state, {then} is quenched back to the singlet state by an inelastic collision with a H_22 molecule. The resulting increase of kinetic energy after the collisional deexcitation is used as a signature of a successful laser transition between hyperfine states. In this paper, we calculate the combined probability that a \muμp atom initially in the singlet hyperfine state undergoes a laser excitation to the triplet state followed by a collisional-induced deexcitation back to the singlet state. This combined probability has been computed using the optical Bloch equations including the inelastic and elastic collisions. Omitting the decoherence effects caused by {the laser bandwidth and }collisions would overestimate the transition probability by more than a factor of {two in the experimental conditions. Moreover,} we also account for Doppler effects and provide the matrix element, the saturation fluence, the elastic and inelastic collision rates for the singlet and triplet states, and the resonance linewidth. This calculation thus quantifies one of the key unknowns of the HFS experiment, leading to a precise definition of the requirements for the laser system and to an optimization of the hydrogen gas target where \muμp is formed and the laser spectroscopy will occur.

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Section: Introductionmentioning

confidence: 99%

Laser excitation of the 1s-hyperfine transition in muonic hydrogen

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Two other collaborations, the FAMU collaboration at RAL (UK) [20,[29][30][31] and another one at J-PARC (Japan) [32][33][34], are also aiming at a precision measurement of the HFS in µp. For all three experimental collaborations, the main challenge is posed by the small laser-induced transition probability resulting from the small matrix element (magnetic dipole-type transition, M 1), in conjunction with a transition wavelength at 6.8 µm where no adequate (sufficiently powerful) laser technologies are available, and the large volume where µp atoms are formed.…”

mentioning

confidence: 99%

Laser excitation of the 1s-hyperfine transition in muonic hydrogen

Amaro,

Adamczak,

Ahmed

et al. 2021

Preprint

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The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen (µp) with 1 ppm accuracy by means of pulsed laser spectroscopy to determine the two-photon-exchange contribution with 2 × 10 −4 relative accuracy. In the proposed experiment, the µp atom which undergoes a laser excitation from the singlet hyperfine state to the triplet hyperfine state, is quenched back to the singlet state by an inelastic collision with a H 2 molecule. The resulting increase of kinetic energy after the collisional deexcitation is used as a signature of a successful laser transition between hyperfine states. In this paper we calculate the combined probability that a µp atom initially in the singlet hyperfine state undergoes a laser excitation to the triplet state followed by a collisional-induced deexcitation back to the singlet state. This combined probability has been computed using the optical Bloch equations including the inelastic and elastic collisions. Omitting the

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Solid‐state Crystalline Mid‐IR Lasers

2020

Laser‐based Mid‐infrared Sources and Applications

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All-solid-state rapidly tunable coherent 6-10 μm light source for lidar environmental sensing

Cited by 9 publications

References 16 publications

Laser excitation of the 1s-hyperfine transition in muonic hydrogen

Laser excitation of the 1s-hyperfine transition in muonic hydrogen

Laser excitation of the 1s-hyperfine transition in muonic hydrogen

Solid‐state Crystalline Mid‐IR Lasers

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