Spectral, energy, and time parameters of two-photon fluorescence of 2,5-diphenyloxazole polycrystals
Journal Article
·
· Optics and Spectroscopy
OSTI ID:232930
- Lebedev Physics Institute, Moscow (Russian Federation)
Two-photon fluorescence (TPF) spectra of 2,5-diphenyloxazole polycrystals (known in the literature as PPO) were obtained and studied as a function of the pump power and time delay. The fluorescence spectrum shape observed upon two-photon excitation is shown to be distinctly different from that observed upon electron-beam excitation. It is shown that high pump powers result in stimulated fluorescence. PPO exhibits a high TPF quantum yield, the integrated conversion efficiency of exciting radiation to TPF being 40%. The TPF decay time is measured to be 20 ns. The spectral data obtained for PPO polycrystals can be used in the development of new TPF light sources tunable in the UV region. 10 refs., 4 figs., 1 tab.
- OSTI ID:
- 232930
- Journal Information:
- Optics and Spectroscopy, Journal Name: Optics and Spectroscopy Journal Issue: 6 Vol. 79; ISSN OPSUA3; ISSN 0030-400X
- Country of Publication:
- United States
- Language:
- English
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