Various techniques for multiline operation of TEA CO2 lasers

Gupta, P. K.; Chatterjee, U.

doi:10.1016/0030-3992(90)90095-l

Cited by 6 publications

(2 citation statements)

References 39 publications

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“…Based on these results we see that several laser choices are possible. Toward n = 10, power in the Watt range is enough and some CO 2 lasers exist that can even allow a continuous deexcitation scheme for high n values [14,15]. But lower n are better to minimize photoioniza-tion.…”

Section: Saturation Energy Requiredmentioning

confidence: 99%

Laser-stimulated deexcitation of Rydberg antihydrogen atoms

Comparat

Malbrunot

2019

Phys. Rev. A

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Antihydrogen atoms are routinely formed at CERN in a broad range of Rydberg states. Groundstate anti-atoms, those useful for precision measurements, are eventually produced through spontaneous decay. However given the long lifetime of Rydberg states the number of ground-state antihydrogen atoms usable is small, in particular for experiments relying on the production of a beam of antihydrogen atoms. Therefore, it is of high interest to efficiently stimulate the decay in order to retain a higher fraction of ground-state atoms for measurements. We propose a method that optimally mixes the high angular momentum states with low ones enabling to stimulate, using a broadband frequency laser, the deexcitation toward low-lying states, which then spontaneously decay to ground-state. We evaluated the method in realistic antihydrogen experimental conditions. For instance, starting with an initial distribution of atoms within the n = 20 − 30 manifolds, as formed through charge exchange mechanism, we show that more than 80% of antihydrogen atoms will be deexcited to the ground-state within 100 ns using a laser producing 2 J at 828 nm. arXiv:1810.06736v2 [physics.atom-ph]

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Section: Saturation Energy Requiredmentioning

confidence: 99%

Laser-stimulated deexcitation of Rydberg antihydrogen atoms

Comparat

Malbrunot

2019

Phys. Rev. A

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“…Several techniques for multiline operation of pulsed CO 2 lasers have been so far developed and reported (Biswas 1990; Gupta and Chatterjee 1990;Wang et al 2009;Churakov et al 1987;Ruschin et al 1985;Chongyi et al 1984) among which, the spatial separation of optical paths technique is the only one with non-overlapping paths for different lines in the active medium. In all of the other techniques, however, the active medium is communally used by two or more oscillating lines, resulting in lasing under gain competition due to a same laser upper lever for whole of the oscillating lines.…”

Section: Introductionmentioning

confidence: 99%

Temporal controlling of a bifurcated dual-band two-line TEA CO2 laser

et al. 2015

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The influence of N 2 and He ratios in laser gas mixture on the pulse shape and onset delay time of the 10P(20) and 9P(20) lines in a bifurcated dual-band two-line TEA CO 2 laser was investigated. It was shown that the pulse shape as well as delay in onset time of 9P(20) line is strongly dependent on the ratios of N 2 and He components. So that, duration and onset delay time of the 9P(20) line can be respectively controlled in 100-400 ns range and 0.1 up to several ls, by varying the N 2 :He ratio in the gas mixture.

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Various techniques for multiline operation of TEA CO2 lasers

Cited by 6 publications

References 39 publications

Laser-stimulated deexcitation of Rydberg antihydrogen atoms

Laser-stimulated deexcitation of Rydberg antihydrogen atoms

Temporal controlling of a bifurcated dual-band two-line TEA CO2 laser

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