Assessment of a Rubidium ESFADOF Edge-Filter as ... - tuprints

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Table 5.1: Summary of the observed transition lines: The line numbers correspond to the one used in Fig. 5.17 and the recorded spectra have been compared with Kurucz atomic line database [144]. Values are taken from the Kurucz atomic line database. As electron capture by the Rb + -ions into high lying Rydberg-states drive the excitation of these high levels, it is reasonable that all energetically close levels are excited [200, 201]. The pump transition is bold. Line number λ Vac / nm Transition Line number λ Vac / nm Transition 1 358.8070 7P 3/2 → 5S 1/2 16 572.5695 7D 5/2 → 5P 3/2 2 359.2593 7P 1/2 → 5S 1/2 17 572.6190 7D 3/2 → 5P 3/2 3 420.2972 6P 3/2 → 5S 1/2 18 607.2427 8S 1/2 → 5P 1/2 4 421.6706 6P 1/2 → 5S 1/2 19 616.1324 8S 1/2 → 5P 3/2 5 516.6504 4D 3/2 → 5S 1/2 20 620.8022 6D 3/2 → 5P 1/2 6 516.6621 4D 5/2 → 5S 1/2 21 630.0066 6D 5/2 → 5P 3/2 7 517.1088 11S 1/2 → 5P 1/2 22 630.0963 6D 3/2 → 5P 3/2 8 532.3850 10S 1/2 → 5P 1/2 23 728.1995 7S 1/2 → 5P 1/2 9 536.4084 8D 3/2 → 5P 1/2 24 741.0207 7S 1/2 → 5P 3/2 10 539.2057 10S 1/2 → 5P 3/2 25 762.1021 5D 3/2 → 5P 1/2 11 543.3035 8D 5/2 → 5P 3/2 26 775.9782 5D 5/2 → 5P 3/2 12 543.3333 8D 3/2 → 5P 3/2 27 776.1564 5D 3/2 → 5P 3/2 13 558.0326 9S 1/2 → 5P 1/2 28 780.2405 5P 3/2 → 5S 1/2 14 564.9329 7D 3/2 → 5P 1/2 29 794.9783 5P 1/2 → 5S 1/2 15 565.5309 9S 1/2 → 5P 3/2 the violet emission from heavily optically pumped Rb vapors [200], and by Ban et al. , who investigated the Rb 2 diffuse band emission [201], sheds more light on the above observations. The measured fluorescence spectra of Fig. 5.17 agree in detail with the ones published by the cited authors and suggest the induction of a plasma inside the vapor cell. In addition, the sudden spatially extended phase change of the Rb vapor can not be explained by energy-pooling processes, though they are responsible for the induction of the reaction chains, which maintain the laser-induced plasma [190]. A more detailed discussion of the underlying physical processes sheds more light on these observations. In fact, the energy pooling process, which is driven by the optical pumping on the 5S 1/2 → 5P 3/2 transition, is the key-process for the formation of the laser-induced plasma, as it moderately populates some excited atomic levels, from which ionization processes occur [190]. Specifically, the Rb(6P), Rb(5D) and Rb(7S) levels are energetically close to the Rb(5P) + Rb(5P) molecular asymptotes. By taking optical pumping into consideration (hν P represents the energy of the 780 nm pump photon) these levels are populated by the following reaction chains [140, 201, 202]:
Fig. 5.18: Rubidium Grotian energy level diagram together with some ionization potentials: Photonic transitions are indicated by solid arrows and the main energy pooling pathway, reaction 5.13, is indicated by the broken arrow. The solid line marks the ionization potential of one single Rb atom and the dashed line marks the energy sum of the quoted energy-pooling process. Dotted lines mark the corresponding threshold energies E Ion for the listed ionization processes. The photoionization process result in an energy excess of ∆E Ph = 0.5989 eV, which is transferred to the electron. Reactions and energetics accord with Refs. [186, 190, 201].
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INSTITUT FÜR ANGEWANDTE PHYSIK TEC
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Abstract Global and local climate c
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Pentru Alexandru şi Florina
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II Contents 4.3 Measurement Unit .
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2 1 Introduction wide sea currents
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2 Remote Sensing of the Water Colum
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2.1 Measurement Principle 7 highly
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2.1 Measurement Principle 9 Fry and
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2.2 System Requirements 11 operatin
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2.2 System Requirements 13
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2.2 System Requirements 15 Table 2.
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2.2 System Requirements 17 1. Rayle
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2.2 System Requirements 19 wave. Th
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2.2 System Requirements 21 cent pro
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2.2 System Requirements 23 Fig. 2.6
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2.2 System Requirements 25 Both the
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2.3 Ideal Edge-Filter 27 of the Bri
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2.3 Ideal Edge-Filter 29 respective
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32 3 (Excited State) Faraday Anomal
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60 4 Experimental Investigations of
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Page 149 and 150: 6 Conclusion and Outlook The presen
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Page 170 and 171: 160 References [10] G.L. Mellor and
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168 References [125] Cord Fricke-Be
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170 References [158] Triad Technolo
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172 References [186] M. Cheret, L.
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Curriculum Vitae Alexandru Lucian P
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178 1 Publications Conference Proce
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Supervised Theses Denise Stang, Wei
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184 1 Danksagung Bei Herrn Arno Wei
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