Excited-state absorption at 1.57 mu m in U2+: CaF2 and Co2+: ZnSe saturable absorbers

Citation
Z. Burshtein et al., Excited-state absorption at 1.57 mu m in U2+: CaF2 and Co2+: ZnSe saturable absorbers, OPT MATER, 15(4), 2001, pp. 285-291
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
OPTICAL MATERIALS
ISSN journal
0925-3467 → ACNP
Volume
15
Issue
4
Year of publication
2001
Pages
285 - 291
Database
ISI
SICI code
0925-3467(200101)15:4<285:EAA1MM>2.0.ZU;2-9
Abstract
Appreciable excited-state absorption (ESA) in U2+:CaF2 and Co2+:ZnSe satura ble absorbers was measured at lambda = 1.573 mum by optical transmission ve rsus light fluence curves of 30-40 ns long pulses. The ground- and excited- state absorption cross-sections obtained were (9.15 +/- 0.3) x 10(-20) and (3.6 +/- 0.2) x 10(-20) cm(2), respectively, for U2+:CaF2, and (57 +/- 4) x 10(-20) and (12.5 +/- 1) x 10(-20) cm(2) for Co2+:ZnSe. Thus, ESA is not n egligible in U2+:CaF2 and Co2+:ZnSe, as previously estimated. (C) 2001 Else vier Science B.V. All rights reserved.