Two-photon pumped upconversion and nonlinear optical properties of a new lasing dye: HMASPS

Citation
D. Wang et al., Two-photon pumped upconversion and nonlinear optical properties of a new lasing dye: HMASPS, J MOD OPT, 48(11), 2001, pp. 1743-1748
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF MODERN OPTICS
ISSN journal
0950-0340 → ACNP
Volume
48
Issue
11
Year of publication
2001
Pages
1743 - 1748
Database
ISI
SICI code
0950-0340(20010915)48:11<1743:TPUANO>2.0.ZU;2-U
Abstract
Two-photon pumped frequency upconversion optical properties and two-photon absorption (TPA) induced nonlinear absorption of a new dye, trans-4-[p- (N- hydroxyethyl-N-methylamino)styryl]-N-methylpyridinium p-toluene sulfonate ( abbreviated to HMASPS) have been experimentally investigated. This new dye exhibits strong superradiation properties when the pumping power is above i ts threshold. The superradiation upconversion efficiency from 900 to 1150nm and the nonlinear absorption from 720 to 1100nm have been measured. The la rgest effective molecular TPA cross-section was measured to be 44.3x10(-48) cm(4).S.photon(-1) at 920nm. At 1064nm, it was 2.77x10(-48) cm(4).s.photon (-1), much smaller than that at 920nm. The highest conversion efficiency is 7% at 990nm, whereas 4.2% at 1064 nm.