Picosecond pulse generation in a benzene raman generator amplifier system

Meier, B.; Penzkofer, Alfons

doi:10.1007/bf00325533

Cited by 8 publications

(2 citation statements)

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“…The temporal fluorescence behavior was studied by using a mode‐locked titanium‐sapphire laser oscillator amplifier system (Hurricane from Spectra Physics) and an ultrafast streak‐camera (type C1587 temporal disperser with M1952 high speed streak unit from Hamamatsu) (46). Picosecond second harmonic pulses at 400 nm and Raman‐shifted pulses at 456 nm (Raman medium ethanol) (47) were used for excitation.…”

Section: Methodsmentioning

confidence: 99%

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions^†

Tyagi

Penzkofer²

2010

Photochem & Photobiology

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The spectroscopic behavior of lumichrome (7,8-dimethyl-alloxazine, LC) in aqueous solutions in a pH range from -1.08 to 14.6 is studied. Absorption spectra, fluorescence quantum distributions, quantum yields, and lifetimes are determined. The ionization stage of ground-state LC changes with rising pH from the cationic form (LCH(2)(+)) to the neutral form (LCH) with a mid-point pH of pK(c) ≈ -0.53, and to the anionic form (LC(-)) with a mid-point pH of pK(a) ≈ 12.5. Above pH 7 a partial ground-state tautomerization of LCH to 7,8-dimethyl-isoalloxazine (IAH) occurs by N1-N10 intra-molecular proton transfer. For pH > pK(a) ≈ 12.5 LCH and IAH change to the anionic forms LC(-) and IA(-), and above pH 14 LC(-) tautomerizes completely to IA(-). In the excited state some neutral lumichrome (LCH*) converts to cationic lumichrome (LCH(2)(+)) at low pH by proton transfer from H(3)O(+) to LCH*. No photoinduced excited-state tautomerization of lumichrome was observed. LCH for pH > 3 and IAH are reasonably fluorescent. The fluorescence efficiencies of LC(-) and IA(-) are lower than those of LCH and IAH. The fluorescence of LCH(2)(+) is strongly quenched likely by intra-molecular diabatic charge transfer and excited-state relaxation by potential surface touching with the ground state.

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Section: Methodsmentioning

confidence: 99%

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions^†

Tyagi

Penzkofer²

2010

Photochem & Photobiology

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“…In the past, SRS in gases [1], liquids [2] and solids Raman materials [3] has been often used for frequency shifting through the Stokes-and anti-Stokescomponents generated [4]. Generally speaking, SRS in solid-state crystals has a possibility of designing all-solid-state lasers emitting radiation in specified spectral regions [5,6].…”

Section: Introductionmentioning

confidence: 99%

High-peak power multi-wavelength picosecond pulses generated from a BaWO4 Raman-seeded optical parametric amplifier

Du¹,

Shi²,

Zhang³

et al. 2009

Optics Communications

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Europäische Regelungen für Unternehmensübernahmen — eine kapitalmarktorientierte Betrachtung —

Schwartze¹

1993

Ökonomische Analyse Des Unternehmensrechts

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Picosecond pulse generation in a benzene raman generator amplifier system

Abstract: Abstract. Picosecond ruby laser pulses generate simultaneously Stokes pulses of the 992 cm" 1 ring breathing mode and of the 3063 cm"

Cited by 8 publications

References 51 publications

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions^†

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions^†

High-peak power multi-wavelength picosecond pulses generated from a BaWO4 Raman-seeded optical parametric amplifier

Europäische Regelungen für Unternehmensübernahmen — eine kapitalmarktorientierte Betrachtung —

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Picosecond pulse generation in a benzene raman generator amplifier system

Abstract: Abstract. Picosecond ruby laser pulses generate simultaneously Stokes pulses of the 992 cm" 1 ring breathing mode and of the 3063 cm"

Cited by 8 publications

References 51 publications

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions†

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions†

High-peak power multi-wavelength picosecond pulses generated from a BaWO4 Raman-seeded optical parametric amplifier

Europäische Regelungen für Unternehmensübernahmen — eine kapitalmarktorientierte Betrachtung —

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Product

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Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions^†

Absorption and Emission Spectroscopic Characterization of Lumichrome in Aqueous Solutions^†